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1/38 XC9519 series dual output step-up/inverting dc/dc converter general description the XC9519 series is a 2 channel (step-up and inverting) dc/dc converter ic. one dc/dc converter is a step-up dc/dc and the oth er is an inverting dc/dc converter. the step-up conv erter compares a built-in reference voltage 1.0v to the fbp voltage (accuracy 1.5% ) and a positive output voltage can be set freely with the external component s up to 18v. the inverting dc/dc converter compares a diff erence between a reference voltage and the fbn voltage (accuracy 1.5%) to the gnd, then a negative output voltage can be set until -1 5v with the external components. with a 1.2mhz frequency, the size of the external components can be reduced. as for operation mode, the device can be selected to use pwm control or automatic pwm/pfm switching control by the mode pin. in the automatic pwm/pfm switching control mode, control switch es from pwm to pfm during light loads. the series is highly efficient from light loads through to large output currents. in the pwm co ntrol mode, noise is easily reduced since the frequency is fixed. the control mode can be selected for each application. the soft start and current control functions are internally optimized. during st and-by, all circuits in the ic are shutdown to reduce current consumption to as lo w as 1.0 a or less. the device includes a gate control pin for the p-channel mo sfet which is used for a load disconnection at the stand-by mo de. the gainp and gainn pins are used for loop compens ation in order to optimize load transient response. with the built-in uvlo (under voltage lock out) function, the internal driver transistor is forced off when input voltage becomes 2.2v or lower. features input voltage : 2.7v ~ 5.5v output current : 500ma @v in =3.7v, v outp =5.0v, v outn =-5.0v positive output voltage : 4.0v (*1) ~ 18.0v (accuracy 1.5% @25 o c) negative output voltage : -15.0v (*2) ~ -4.0v (accuracy 1.5% @25 o c) oscillation frequency : 1.2mhz soft-start circuit built-in : step-up dc/dc converter 2.5ms (typ.) : inverting dc/dc converter 2.2ms (typ.) protection circuits : over curre nt limit (integral latching) short protection latching uvlo thermal shutdown over voltage protection function addition : control pin load disconnect pin phase compensation pin ceramic capacitor compatible operating ambient temperature : -40 ? ~ +85 ? package : qfn-24 environmentally friendly ?? : eu rohs compliant, pb free *1 v outpset ? v in + 0.2v (v outpset :positive output voltage range) *2 v in - v outnset + v fn ? 20v (v fn : forward voltage of sbd n , v outnset : nagative output voltage range) typical application circuit etr0710-008 typical performance characteristics enp fbn pgnd r fbp1 l p v in XC9519 fbp lxp enn bsw vref lxn pvin avin agnd sbd p c in_a r fbp2 l n r fbn2 r fbn1 c lp c ln sbd n v outp c l_vr gainp r zn c zp c zn r zp gainn voutp c in_p v outn mode voutn swp p-ch mos c fbp r sp c in_sw v outp =5.0v, v outn =-5.0v, i outp =i outn c lp , c ln =44.7 f, l p , l n =3.3 h (vlf5014s-3r3m2r0), sbd p , sbd n : cms03 p-ch mos: emh1303, r zp =7.5k , c zp =4.7nf, r zn =130k , c zn =0.47nf 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i out p , i out n (ma) efficiency:effi(% ) 3.6v 2.7v v in = 4.4v v enp ="h",v enn ="h" pwm/pfm (v mode ="h") pwm (v mode ="l") applications amoled - smartphones - tablet pcs - automotive navigation systems ccd image sensors - surveillance cameras e-paper -e-books
2/38 XC9519 series block diagram * diodes inside the circuit are an esd protection diode and a parasitic diode. product classification XC9519 ?????- designator item symbol description uvlo detect voltage a uvlo detect voltage 2.2v uvlo hysteresis width 0.2v ? oscillation frequency 12 1.2 mhz maximum current limit a 2.0a ?- (*1) package (order unit) zr -g qfn-24 (1,000/reel) (*2) ? ordering information (*1) the ?-g? suffix denotes halogen and antimony free as well as being fully rohs compliant. (*2) the XC9519 reels are shipped in a moisture-proof packing. internal on/off controller
3/38 XC9519 series pin configuration ? pin assignment pin number qfn-24 pin name function 1, 2 pvin power supply input 1 3 nc no connection 4, 5 lxn switching of inverting dc/dc converter 6 voutn detect monitoring of inve rting dc/dc output voltage 7 mode selection pin for control mode 8 vref reference output voltage 9 avin power supply input 2 10 fbn feedback pin for inverting dc/dc converter 11 gainn loop compensation pin for inverting dc/dc converter 12 agnd analog ground 13 gainp loop compensation pin for step-up dc/dc converter 14 fbp feedback pin for step-up dc/dc converter 15 enp chip enable pin for step-up dc/dc converter 16 bsw p-channel mos fet gate control pin 17 voutp output voltage sense for step-up dc/dc converter 18, 19 lxp switching output of step-up dc/dc converter 20 nc no connection 21, 22 pgnd power ground 23 enn chip enable pin for inverting dc/dc converter 24 swp detect monitoring voltage pin for p-channel mos fet drain *1: the back metal pad, agnd pin and two pgnd pins (no. 21 and 22) should be connected outside. *1
4/38 XC9519 series function 1. enp pin function ? v in enp v outp bsw 0v v in 0v 0v v in 2.5ms 2. enn pin function v in enn v outn 0v 0v 2.2ms 3. mode pin function enn pin status h inverting dc/dc converter active l inverting dc/dc converter stand-by * please do not leave the enp pin open. enp pin status h step-up dc/dc converter active l step-up dc/dc converter stand-by * please do not leave the enp pin open. mode pin status h auto pwm/pfm l pwm control * please do not leave the mode pin open.
5/38 XC9519 series absolute maximum ratings parameter symbol ratings units pvin pin voltage v pvin -0.3 ~ +6.0 v avin pin voltage v avin -0.3 ~ +6.0 v enp pin voltage v enp -0.3 ~ +6.0 v enn pin voltage v enn -0.3 ~ +6.0 v mode pin voltage v mode -0.3 ~ +6.0 v lxp pin voltage v lxp -0.3 ~ +22.0 v lxn pin voltage v lxn v pvin -22.0 ~ v pvin +0.3 v fbp pin voltage v fbp -0.3 ~ +6.0 v fbn pin voltage v fbn -0.3 ~ +6.0 v voutp pin voltage v outp -0.3 ~ +22.0 v voutn pin voltage v outn v avin -22.0 ~ v avin +0.3 v bsw pin voltage v bsw -0.3 ~ +6.0 v swp pin voltage v swp -0.3 ~ +6.0 v vref pin voltage v ref -0.3 ~ +6.0 v gainp pin voltage v gainp -0.3 ~ +6.0 v gainn pin voltage v gainn -0.3 ~ +6.0 v lxp pin current i lxp 4000 ma lxn pin current i lxn 4000 ma power dissipation pd 1500 (pcb mounted) * mw operating ambient temper ature topr -40 ~ +85 o c storage temperature tstg -55 ~ +125 o c * all voltages are described based on the agnd and p gnd pin. * the value is an example of data which is taken with t he pcb mounted. please refer to our web site for details. ta = 2 5
6/38 XC9519 series electrical characteristics (*1) if the applied voltage and its pin name are not stated, those pins are left open for measurement. parameter symbol conditions (*1) min. typ. max. units circuit input voltage v in 2.7 - 5.5 v - uvlo detect voltage v uvlo v enp =1.5v , v enn = v fbp = 0v, v fbn = 0.1v the voltage which l xp stops oscillation while v in is decreasing from 2.4v. 2.0 2.2 2.4 v uvlo release voltage v uvlor v enp =1.5v , v enn = v fbp = 0v, v fbn = 0.1v the voltage which l xp starts oscillation while v in is increasing from v uvlo . 2.2 2.4 2.6 v uvlo hysteresis range v uvloh v uvloh = v uvlor - v uvlo - 0.2 - v - supply current 1 i dd1 v in =v enp = v enn = v mode = 5.5v v fbp =5.5v, v fbn = -0.1v, v outp = v swp = 5.5v 50 170 450 a supply current 2 i dd2 v in = v enn = v mode = 5.5v, v enp = 0v v fbn = -0.1v 30 90 250 a supply current 3 i dd3 v in =v enp = v mode = 5.5v, v enn =0v v fbp = 5.5v, v outp = v swp = 5.5v 30 110 250 a stand-by current i stb v in =5.5v, v enp =v enn = v mode = 0v - 0 1.0 a enp ?h? voltage v enph v in = 5.5v, v enn = v mode = 0v, v fbp = 0v the voltage which l xp starts oscillation while v enp is increasing from 0.3v. 1.4 - 5.5 v enp ?l? voltage v enpl v in = 5.5v, v enn = v mode = 0v, v fbp = 0v the voltage which l xp stops oscillation while v enp is decreasing from 1.4v. agnd - 0.3 v enp ?h? current i enph v in = v enp = 5.5v -0.1 - 0.1 a enp ?l? current i enpl v in = v enp = 0v -0.1 - 0.1 a enn ?h? voltage v ennh v in = 5.5v, v enp = v mode = 0v, v fbn = 5.5v the voltage which l xn starts oscillation while v enn is increasing from 0.3v. 1.4 - 5.5 v enn ?l? voltage v ennl v in = 5.5v, v enp = v mode = 0v, v fbn = 5.5v the voltage which l xn stops oscillation while v enn is decreasing from 1.4v. agnd - 0.3 v enn ?h? current i ennh v in = v enn = 5.5v -0.1 - 0.1 a enn ?l? current i ennl v in = v enn = 0v -0.1 - 0.1 a mode ?h? voltage v modeh v in = v enp = 5.5v, v enn = 0v, the voltage which supply current decreases while v mode is increasing from 0.3v. 1.4 - 5.5 v mode ?l? voltage v model v in = v enp = 5.5v, v enn = 0v, the voltage which supply current increases while v mode is decreasing from 1.4v. agnd - 0.3 v mode ?h? current i modeh v in = v mode = 5.5v -0.1 - 0.1 a mode ?l? current i model v in = v mode = 0v -0.1 - 0.1 a fbp ?h? current i fbph v in =5.5v, v enp =v enn =v mode =0v, v fbp =5.5v -0.1 - 0.1 a fbp ?l? current i fbpl v in =5.5v, v enp =v enn =v mode =0v, v fbp =0v -0.1 - 0.1 a fbn ?h? current i fbnh v in =5.5v, v enp =v enn =v mode =0v, v fbn =5.5v -0.1 - 0.1 a fbn ?l? current i fbnl v in =5.5v, v enp =v enn =v mode =0v, v fbn =0v -0.1 - 0.1 a swp ?h? current i swph v in =5.5v, v enp =v enn =v mode =0v, v swp =5.5v -0.1 - 0.1 a swp ?l? current i swpl v in =5.5v, v enp =v enn =v mode =0v, v swp =0v -0.1 - 0.1 a integral latch time t lat v in =v enp =v enn = 5.5v, v mode =0v v fbp =0.9v, v fbn = 0.1v time to stop operation from the start of maximum current limit status. 1.0 2.0 3.0 ms thermal shutdown temperature t tsd - 150 - o c - thermal shutdown release temperature t tsdr - 130 - o c - thermal shutdown hysteresis range t hys t hys =t tsdr - t tsd - 20 - o c - ta=25 ? XC9519 series, common characteristics f osc =1.2mhz
7/38 XC9519 series electrical characteristics (continued) ? XC9519 series, step-up dc/dc converter parameter symbol conditions (*1) min. typ. max. units circuit output voltage range v outpset 4.0 (*2) - 18.0 v - fbp voltage v fbp v in = v enp = 3.6v, v enn = v mode = 0v v outp = v swp = 3.6v the voltage which l xp starts oscillation while v fbp is decreasing. 0.985 1.000 1.015 v ? oscillation frequency f oscp v in = v enp = 3.6v, v enn = v mode = 0v v outp = v swp = 3.6v, v fbp =0v 1020 1200 1380 khz ? pfm switching current i pfmp v in =v enp = v mode = 3.6v, v enn =0v 180 350 550 ma ? maximum duty cycle d maxp v in = v enp = 3.6v, v enn = v mode = 0v v outp = v swp = 3.6v, v fbp =0v 84 90 97 % ? lxp sw ?h? on resistance r lxph v in = v enp = 3.6v, v enn = v mode = 0v, i lxp = 100ma - 0.12 0.28 ? lxp sw ?h? leak current i leakh v in =5.5v, v enp =0v, v lxp =5.5v - 0.01 1.0 a ? maximum current limit (*3) i limp v in =v enp = 5.5v, v enn = v mode =0v v fbp = 0.9v, v outp = v swp = 5.5v 2000 - 4000 ma ? fbp voltage temperature characteristics v fbp / (v fbp ~ topr) -40 o c Q topr Q 85 o c - 100 - ppm / o c- soft-start time t ssp v in = 3.6v, v enn = v mode = 0v v outp = v swp = 3.6v, v fbp = 0.95v time to start l xp oscillation from the rise of v enp . (0v 3.6v) 0.8 2.5 5.2 ms ? short protection threshold voltage v shortp v in =v enp = 5.5v, v enn = v mode =0v v outp = v swp = 5.5v the voltage which the integral latch time becomes 200 s or less while v fbp is decreasing. 0.3 0.5 0.7 v ? over voltage protection limit v ovpp v in = v enp = 3.6v, v enn = v mode = 0v v outp = v swp = 3.6v, v gainp = 3.6v the voltage which l xp stops oscillation while v fbp is increasing. v fbp +0.03 v fbp +0.07 v fbp +0.10 v ? bsw pin current i bsw v in = v enp = 3.6v, v enn = v mode = 0v v outp = v swp = 3.6v, v bsw =3.6v 0.2 1.2 3.0 ma ? c l discharge resistance r dchgp v in = 6.0v, v enp =v enn = v mode = 0v v outp = 4.0v 50 200 500 ? note: (*1) if the applied voltage and its pin name are not stated, those pins are left open for measurement. (*2) input voltage or positive output voltage range should be v outpset R v in + 0.2v. (*3) maximum current limit denotes the level of detection at peak of coil current. ta=25
8/38 XC9519 series electrical characteristics (continued) parameter symbol conditions (*1) min. typ. max. units circuit output voltage range v outnset -15.0 (*2) - -4.0 v - fbn voltage v fbn v in = v enn = 3.6v, v enp = v mode = 0v the voltage which l xn starts oscillation while v fbn is increasing. -26 0 26 mv reference voltage v ref v in = v enn = 3.6v, v enp = v mode = 0v, v fbn = 0.1v 0.970 1.000 1.030 v output voltage accuracy v outna v outna =v ref -v fbn 0.985 1.000 1.015 v - oscillation frequency f oscn v in = v enn = 3.6v, v enp = v mode = 0v, v fbn = 0.1v 1020 1200 1380 khz pfm switching current i pfmn v in = v enn = v mode = 3.6v, v enp = 0v 220 350 550 ma maximum duty cycle d maxn v in = v enn = 3.6v, v enp = v mode = 0v, v fbn = 0.1v 84 90 97 % lxn sw ?l? on resistance r lxnl v in = v enn = 3.6v, v enp = v mode = 0v, i lxn = 100ma - 0.22 0.48 lxn sw ?l? leak current i leakl v in = v enn = 3.6v, v enp = v mode = 0v, v fbn = 0.1v - 0.01 1.0 a maximum current limit (*3) i limn v in = v enn = 5.5v, v enp = v mode = 0v v fbn = 0.1v 2000 - 4000 ma reference voltage temperature characteristics v ref / (v ref ~ to p r ) -40 o c Q topr Q 85 o c - 100 - ppm / o c - soft-start time t ssn v in = 3.6v, v enp = v mode = 0v, v fbn = 0.05v time to start l xn oscillation from the rise of v enp . (0v 3.6v) 0.8 2.2 4.0 ms short protection threshold voltage v shortn v in = v enn = 5.5v, v enp = v mode = 0v the voltage which the integral latch time becomes 200 s or less while v fbn is increasing. 0.3 0.5 0.7 v over voltage protection limit v ovpn v in = v enn = 3.6v, v enp = v mode = 0v, v gainn = 3.6v the voltage which l xn stops oscillation while v fbn is decreasing. v fbn -0.10 v fbn -0.07 v fbn -0.03 v c l discharge resistance r dchgn v in = 6.0v, v enp =v enn = v mode = 0v v outn = -4.0v 50 200 500 ? XC9519 series, inverting dc/dc converter ta=25 note: (*1) if the applied voltage and its pin name are not stated, those pins are left open for measurement. (*2) input voltage or positive output voltage range should be v in - v outnset + v fn Q 20v (v fn : forward voltage of external schottky barrier diode) . (*3) maximum current limit denotes the level of detection at peak of coil current.
9/38 XC9519 series operational explanation ? the XC9519 series consists of a reference voltage source, ramp wave circuit, error amplifier, pwm comparator, phase compensatio n circuit, driver transistor, current limiter circui t, short protection circuit, uv lo circuit, thermal shutdown circuit, over voltage prot ection, load disconnect control and others. (see the block diagram below.) by using the error amplifier, the fbp (fbn) pin voltage is compared with the internal reference voltage. the error amplifier ou tput is sent to the pwm comparator in order to determine the duty cycle of pwm switch ing. the signal from the error amplifier is compared with the ramp wave from the ramp wave circuit, and the resulting output is delivered to t he buffer driver circuit to prov ide on-time of the duty cycle at the lxp (lxn) pin. this process is continuously perform ed to ensure stable output voltage. the current feedback circuit monitors the driver transistor cu rrent for each switching operation, and modulates the error ampli fier output signal to provide multiple feedback signals. this enables a stable feedback loop even when using a low esr capacitor such as ceramic, which results in ensuring stable output voltage. * diodes inside the circuit are an esd protection diode and a parasitic diode. internal on/off controller
10/38 XC9519 series operational explanation (continued) the reference voltage source provides the reference volt age to ensure stable output voltage of the dc/dc converter. the step-up dc/dc converter error amplifier is an amplifier for output voltage monitoring. the fbp pin voltage is compared to t he reference voltage. when a voltage lower than the reference voltage is feedback to the fbp pin voltage, the output voltage of the error am plifier goes high. external compensation of the error amplifier frequency characteristic is also possible. the inverting dc/dc converter error amplifier is an amplifier fo r output voltage monitoring. the fbn pin voltage is compared to gnd. when a voltage higher than gnd is feedback to the fbn pin voltage, the output voltage of the error amplifier goes high. external compe nsation of the error amplifier frequency charac teristic is also possible. the ramp wave circuit determines switching frequency. the frequ ency is fixed 1.2mhz internally . clock pulses generated in this circuit are used to produce ramp waveforms needed for pwm operation, and to synchronize all the internal circuits. when the avin pin voltage becomes 2.2v or lower, the driver tran sistor is forced off to prevent false pulse output caused by un stable operation of the internal circuitry. when the avin pin voltage becomes 2.4v or higher , switching operation takes place. by rele asing the uvlo function, the ic performs the soft start function to initiate output startup operation. the soft start function operates even w hen the avin pin voltage falls momentarily below the uvlo detect voltage. the uvlo circuit does not cause a complete shutdown of the ic, but cau ses pulse output to be suspended; therefore, the internal circuitry remains in operation. for protection against heat damage of the ics, thermal shutdown fu nction monitors chip temperatur e. the thermal shutdown circui t starts operating and the driver transistor will be tur ned off when the chip?s temperature reaches 150 o c. when the temperature drops to 130 o c or less after shutting of the current flow, the ic performs the soft start function to initiate output startup operation. in pfm control operation, until coil cu rrent reaches to a specified level (i pfmp , i pfmn ), the ic keeps the driver trans istor on. in this case, time (t on ) that the driver transistor is kept on can be given by the following formula. t on = l i pfmp (i pfmn ) / v in < pfm duty limit > in pfm control operation, the maximum duty cycle (dty limit_pfm ) is set to 50% (typ.). therefore, under the condition that the duty increases (e.g. the condition that the step-up ratio is large), it?s possib le for the driver transistor to be turned off even when the co il current doesn?t reach to i pfmp (i pfmn ).
11/38 XC9519 series operational explanation (continued) < c l auto-discharge function > this function enables high-s peed discharge of the charge on the output capacitor (c l ) when an l level signal is input to the enp (enn) pin by means of the internal switch between the voutp pi n and agnd pin (between the voutn pin and avin pin). this function makes it possible to prevent malfunctioning of applicati ons caused by charge remaining on c l . the discharge time is determined by the c l discharge resistance (r dchc ) and c l . if ( = c l r dchg ) is the time constant of c l and r dchg , the equation for the output voltage discharge time can be obtained from the following cr discharge equation. c = ln v outset / v v: output voltage during discharge v outset : output voltage t: discharge time : c l r dchg [example] when the set voltage (v outpset )=5.0v, c lp =18.8 f, and the c l discharge resistance (r dchgp )=200 (typ.) of the dc/dc converter, the discharge time t from the start of c l high-speed discharge until the output voltage fall s to 1.0v can be calculated as follows: c = ln ( v outpset / v )= c lp r dchgp ln ( v outpset / v ) = 18.8 f200 ln ( 5.0v / 1.0v ) = 6.0510 -3 s = 6.05 ms (*1) (*1) calculated with i out = 0ma the step-up dc/dc converter and the inverting dc/dc converter ar e switching synchronously based on one internal clock. the phas e of the step-up driver on timing for the dc/dc converter is shift ed to completely opposite position (180 degrees different) upon th e phase of driver on timing for the inverting dc/dc converter. overvoltage protection monitors the output voltage v outp (v outn ) using the fbp (fbn) pin voltage, and prevents the output voltage v outp (v outn ) from rising too far above the set voltage. in particular, fluc tuations in the load cause the output voltage to rise, and when the fbp (fbn) pin voltage reaches the overvoltage protecti on detection voltage, the driver transistor of the step-up dc/dc converter (inverti ng dc/dc converter) is turned off to hold down the rise of output volt age. when the output voltage falls after overvoltage protection d etection, normal dc/dc converter operation resumes. the output voltage v out_ovp that is detected by overvoltage protection is obtained from the following equation: v out_ovp p (v out_ovpn )=v outpset (v outnset ) v ovp p (v ovpn ) v outpset (v outnset ): output voltage, v ovpp (v ovpn ): detect overvoltage protection voltage [example] in a step-up dc/dc converter with the i ndicated conditions, the output voltage v out_ovpp that is detected by overvoltage protection can be calculated as shown below. condition: output voltage (v outpset )=5.0v, v ovpp =v fbp +0.07v(typ.) , v fbp =1.0v(typ.) v out_ovpp = v outpset v ovp = 5.0v (1.0 + 0.07(typ.)) =5.0v 1.07 = 5.35v the load disconnect control circuit makes it possible to break continuity between v in and v outp by turning off the external p-ch mos fet when the step-up dc/dc converter is in the standby state. boost_i lx internal osc inverting_i lx 0a 0a inductor peak current inductor peak current 1.2mhz
12/38 XC9519 series operational explanation (continued) the current limiter circuit of the XC9519 series monitors the cu rrent flowing through the driver transistor, and features a com bination of the current limit mode and the operation suspension mode. when the driver current is greater than a specific level, the current limit function operates to turn off the pulses from the lxp (lxn) pin at any given timing. when the driver transistor is turned o ff, the limiter circuit is then released fr om the current limit detection state. at the next pulse, the driver transistor is turned on. however, the transistor is immediately turned off in the case of an ove r current state. when the over current state is eliminated, the ic resumes its normal operation. the ic waits for the over current state to end by repeating the steps through . if an over current state continues for the integral latch time and the above three steps are repeatedly performed, the ic performs the function of integral latching the off state of the driv er transistor, and goes into operation suspension mode. once the ic is in suspension mode, operations can be resumed by ei ther turning the ic off via the enp (enn) pin, or by restorin g power. care must be taken when laying out the pc board, in order to prev ent misoperation of the current limit mode. depending on the state of the pc board, latch time may become longer and latch operation may not work. in order to avoid the effect of noise, the board should be laid out so that input capacitors are placed as clos e to the ic as possible. (a) step-up dc/dc converter enp v lxp v outp i outp current limit level limit < 2.0ms(typ.) restart agnd,pgnd 0ma limit > 2.0ms(typ.) agnd,pgnd (b) inverting dc/dc converter v lxn v outn i outn current limit level limit < 2.0ms(typ.) restart agnd,pgnd 0ma limit > 2.0ms(typ.) agnd,pgnd enn the short-circuit protecti on circuit monitors the output voltage from the v outp (v outn ). in case where output is accidentally shorted to the gnd and when the fbp voltage decreases less than short protection thre shold voltage or fbn pin voltage becomes larger than short pr otection threshold voltage and a current more than the i lim flows to the driver transistor, the short-circui t protection quickly operates to turn off and to latch the driver transistor. once the ic is in suspension mode, operations can be resumed by ei ther turning the ic off via the enp (enn) pin, or by restorin g power.
13/38 XC9519 series external components the output voltage v outp of a step-up dc/dc converter can be set by connecting external dividing resistors r fbp1 and r fbp2 . the output voltage v outp is determined by the values of r fbp1 and r fbp2 as given in the equation below. adjust r fbp1 and r fbp2 so that (r fbp1 + r fbp2 ) < 500k . ?? v outp = v fbp (r fbp1 + r fbp2 ) / r fbp2 set the output voltage so that v outp ? v in + 0.2v is satisfied. ? adjust the value of the phase compensation speed-up capacitor c fbp so that f zfp =1 / (2 r fbp1 ) is about 40khz, and insert several k in series as r sp . if a high output voltage is set, inserting a phase compens ation speed-up capacitor ma y cause unstable operation. examples of setting c fbp and r sp are shown in the next section, ?step-up dc/dc co nverter error amplifier external compensation?. typical examples v outp r fbp1 r fbp2 4.0v 300k 100k 5.0v 300k 75k 9.0v 240k 30k 12.0v 330k 30k 15.0v 336k 24k 18.0v 408k 24k the output voltage v outn of an inverting dc/dc converter can be set by connecting external dividing resistors r fbn1 and r fbn2 . the output voltage v outn is determined by the values of r fbn1 and r fbn2 as given in the equation below. adjust r fbn1 and r fbn2 so that (r fbn1 + r fbn2 ) < 500k . ?? v outn = - (v ref - v fbn ) r fbn1 / r fbn2 set the output voltage so that ?? v in - v outn + v fn Q 20.0v (v fn : forward voltage of external diode sbd n ) is satisfied. typical examples v outn r fbn1 r fbn2 -4.0v 300k 75k -5.0v 300k 60k -9.0v 270k 30k -12.0v 360k 30k -15.0v 360k 24k
14/38 XC9519 series component selection method (continued) external compensation of the frequency characteristic of a step-up dc/dc converter error amplifier is possible with r zp and c zp . the values of r zp and c zp can be adjusted to obtain the optimum l oad-transient response (step re sponse). for adjustment using the input voltage and outp ut voltage, use the setting values below. v in output voltage range l p c lp r zp c zp c fbp r sp 2 4.7 f5.1k 4.7nf 47pf (*1) 4.7k 4.6v Q v outp Q 5.0v 3.3 h 4 4.7 f8.2k 4.7nf 47pf (*1) 4.7k 2 4.7 f5.1k 4.7nf - - 5.0v < v outp Q 9.0v 3.3 h 4 4.7 f7.5k 4.7nf - - 2 4.7 f 10k 4.7nf - - 9.0v < v outp Q 12.0v 3.3 h 4 4.7 f 18k 2.2nf - - 2 4.7 f 16k 2.2nf - - 12.0v < v outp Q 15.0v 3.3 h 4 4.7 f 27k 2.2nf - - 2 4.7 f 16k 2.2nf - - li-ion (2.7 4.4v) 15.0v < v outp Q 18.0v 3.3 h 4 4.7 f 24k 4.7nf - - v in output voltage range l p c lp r zp c zp c fbp r sp 2 4.7 f8.2k 4.7nf 47pf (*2) 4.7k 4.0v Q v outp Q 5.0v 3.3 h 4 4.7 f 13k 4.7nf 47pf (*2) 4.7k 2 4.7 f 16k 2.2nf - - 5.0v < v outp Q 9.0v 3.3 h 4 4.7 f 22k 2.2nf - - 2 4.7 f 18k 2.2nf - - 9.0v < v outp Q 12.0v 3.3 h 4 4.7 f 30k 2.2nf - - 2 4.7 f 24k 2.2nf - - 12.0v < v outp Q 15.0v 3.3 h 4 4.7 f 36k 2.2nf - - 2 4.7 f 22k 2.2nf - - 3.3v10% 15.0v < v outp Q 18.0v 3.3 h 4 4.7 f 36k 2.2nf - - v in v outp l p c lp r zp c zp c fbp r sp 2 4.7 f4.7k 4.7nf 68pf (*3) 4.7k 5.7v Q v outp Q 7.0v 3.3 h 4 4.7 f8.2k 4.7nf 68pf (*3) 4.7k 2 4.7 f5.1k 4.7nf - - 7.0v < v outp Q 9.0v 3.3 h 4 4.7 f 10k 4.7nf - - 2 4.7 f8.2k 4.7nf - - 9.0v < v outp Q 12.0v 3.3 h 4 4.7 f 16k 2.2nf - - 2 4.7 f 13k 2.2nf - - 12.0v < v outp Q 15.0v 3.3 h 4 4.7 f 24k 2.2nf - - 2 4.7 f 12k 2.2nf - - 5v10% 15.0v < v outp Q 18.0v 3.3 h 4 4.7 f 18k 4.7nf - - (*1) setting value with rfbp1 = 300k (*2) setting value with rfbp1 = 360k (*3) setting value with rfbp1 = 240k
15/38 XC9519 series component selection method (continued) external compensation of the frequency characteristic of an in verting dc/dc converter error amplifier is possible with r zn and c zn . the values of r zn and c zn can be adjusted to obtain the optimum l oad-transient response (step re sponse). for adjustment using the input voltage and outp ut voltage, use the setting values below. v in output voltage range l n c ln r zn c zn 2 4.7 f 51k 1.0nf -4.0v R v outn R -5.0v 3.3 h 4 4.7 f 110k 0.47nf 2 4.7 f 68k 0.47nf -5.0v > v outn R -9.0v 3.3 h 4 4.7 f 130k 0.47nf 2 4.7 f 120k 0.47nf -9.0v > v outn R -12.0v 3.3 h 4 4.7 f 200k 0.47nf 2 4.7 f 110k 1.0nf li-ion (2.7 4.4v) -12.0v > v outn R -15.0v 3.3 h 4 4.7 f 200k 0.47nf v in output voltage range l n c ln r zn c zn 2 4.7 f 51k 1.0nf -4.0v R v outn R -5.0v 3.3 h 4 4.7 f 110k 0.47nf 2 4.7 f 68k 0.47nf -5.0v > v outn R -9.0v 3.3 h 4 4.7 f 130k 0.47nf 2 4.7 f 120k 0.47nf -9.0v > v outn R -12.0v 3.3 h 4 4.7 f 200k 0.47nf 2 4.7 f 110k 1.0nf 3.3v10% -12.0v > v outn R -15.0v 3.3 h 4 4.7 f 200k 0.47nf v in output voltage range l n c ln r zn c zn 2 4.7 f 51k 1.0nf -4.0v R v outn R -5.0v 3.3 h 4 4.7 f 110k 0.47nf 2 4.7 f 68k 0.47nf -5.0v > v outn R -9.0v 3.3 h 4 4.7 f 130k 0.47nf 2 4.7 f 120k 0.47nf -9.0v > v outn R -12.0v 3.3 h 4 4.7 f 200k 0.47nf 2 4.7 f 110k 1.0nf 5v10% -12.0v > v outn R -15.0v 3.3 h 4 4.7 f 200k 0.47nf
16/38 XC9519 series typical application circuit (v in =3.6v, v outp =5.0v, v outn =-5.0v) v in =3.6v, v outp =5.0v, v outn =-5.0v ? capacitor ? coil, schottky diode, p-ch mosfet l p, l n : 3.3 h (vlf5014s-3r3m2r0, tdk-epc) (mss5121-332, coilcraft) sbd p, sbd n : xbs304s17r-g (torex) cms03 (toshiba) p-ch mos : emh1303 (sanyo) when selecting external components, refer to the specifications of each component and select so as not to exceed the ratings. ? resistor r fbp1 : 300k r fbn1 : 300k r zp : 8.2k r fbp2 : 75k r fbn2 : 60k r zn : 110k r sp : 4.7k c in_p : 10 f/ 10v (c2012jb1a106m, tdk-epc) c in_sw : 4.7 f/ 10v (c2012jb1a475m, tdk-epc) c in_a : 0.1 f/ 10v (c1005jb1a104k, tdk-epc) c lp : 44.7 f/ 10v (c2012jb1a475m, tdk-epc) c ln : 44.7 f/ 10v (c2012jb1a475m, tdk-epc) c l_vr : 0.22 f/ 6.3v (c1005jb0j224m, tdk-epc) c zp : 4.7nf/ 25v (c1005jb1e472k, tdk-epc) c zn : 0.47nf/ 50v (c1005jb1h471k, tdk-epc) c fbp : 47pf/ 50v (c1005ch1h470j, tdk-epc) for c in_p , c in_sw , c in_a , c l_vr , c lp , and c ln , use a b characteristic (jis st andards) or x7r/x5r (eia standards), and use a ceramic capacitor with minimal reduction of capacitanc e when a dc bias is applied.
17/38 XC9519 series typical application circuit (continued) (v in =3.6v, v outp =15.0v, v outn =-15.0v) v in =3.6v, v outp =15.0v, v outn =-15.0v ? capacitor ? coil, schottky diode, p-ch mosfet l p, l n : 3.3 h (vlf5014s-3r3m2r0, tdk-epc) (mss5121-332, coilcraft) sbd p, sbd n : xbs304s17r-g (torex) cms03 (toshiba) p-ch mos : emh1303 (sanyo) when selecting external components, refer to the specifications of each component and select so as not to exceed the ratings. ? resistor r fbp1 : 336k r fbn1 : 360k r zp : 27k r fbp2 : 24k r fbn2 : 24k r zn : 200k r sp : open c in_p : 10 f/ 10v (c2012jb1a106m, tdk-epc) c in_sw : 4.7 f/ 10v (c2012jb1a475m, tdk-epc) c in_a : 0.1 f/ 10v (c1005jb1a104k, tdk-epc) c lp : 44.7 f/ 25v (tmk212bj475kg, taiyo yuden) c ln : 44.7 f/ 25v (tmk212bj475kg, taiyo yuden) c l_vr : 0.22 f/ 6.3v (c1005jb0j224m, tdk-epc) c zp : 2.2nf/ 50v (c1005jb1h222k, tdk-epc) c zn : 0.47nf/ 50v (c1005jb1h471k, tdk-epc) c fbp : open for c in_p , c in_sw , c in_a , c l_vr , c lp , and c ln , use a b characteristic (jis standar ds) or x7r/x5r (e ia standar ds), and use a ceramic capacitor with minimal reduction of capacitance when a dc bias is applied.
18/38 XC9519 series test circuits 1) circuit ? 2) circuit ? ???? 3) circuit ? 1f 47 47 wave form measure point wave form measure point enp agnd enn pgnd bsw pvin voutp lxp swp gainn avin gainp mode voutn lxn fbp vref fbn 0.22f 100k v v in 4) circuit ?
19/38 XC9519 series test circuits (continued) 5) circuit ? 6) circuit ? 7) circuit 1f 47 47 a a a a a a a a a a a a a wave form measure point wave form measure point enp agnd enn pgnd bsw pvin voutp lxp swp gainn avin gainp mode voutn lxn fbp vref fbn v in
20/38 XC9519 series test circuits (continued) 8) circuit 9) circuit 1. capacitance between pins the capacitances between the following pi ns are omitted in the circuit diagram. pvin pin ? pgnd pin: 1 f fbp pin - agnd pin: 1 f fbn pin - agnd pin: 1 f vref pin - agnd pin: 1 f 2. testing method for on resistance testing is executed at 100% duty using test mode.
21/38 XC9519 series notes on use 1. for temporary, transitional voltage drop or voltage rising phenomenon, the ic is liable to malfunction should the ratings be exceeded. 2. the characteristics of this ic are highly dependent on peripheral circuits. when selecting external components, refer to the specificati ons of each component and select so as not to exceed the ratings . some peripheral component select ions may cause unstable operation. before use, sufficiently test operation using the actual equipment. 3. when the input voltage v in is low and the output voltage v outp /v outn is high, the input current may be limited by the maximum duty limit and the set output voltage may not be output. 4. if the step-up ratio is high and excessive load current flows, the input current may be limited by the maximum duty limit an d maximum current limit protection and short-circui t protection may not activate. 5. do not connect a component other than c l_vr to the vref pin. if a component other than c l_vr is connected, the output voltage v outn of an inverting dc/dc converter may become unstable. 6. for external components, use the components specified in the standard circuit examples and component selection methods. 7. when the input voltage v in is high and the output voltage v outp /v outn is low, intermittent oscillati on may occur during pwm control. 8. if the step-up ratio is low in a step-up dc/dc converter, the output voltage v outp may become unstable during pfm/pwm switching control (v mode = "h"). 9. during pfm/pwm switching control (v mode = "h"), the output voltage may become unstable near switching between pfm mode and pwm mode. v out p 4?+0= time:10 s/div c lp =44.7 f l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03 p-ch mos: emh1303 r zp =7.5k ? , c zp =4.7nf v out p 4?+0= time:20 s/div c lp =44.7 f l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03 p-ch mos: emh1303 r zp =7.5k ? , c zp =4.7nf step-up dc/dc converter: pwm/pfm mode (v in =3.6v, v outp =5.0v, i outp =120ma v enp ="h", v enn ="l", v mode ="h") step-up dc/dc converter: pwm/pfm mode (v in =4.4v, v outp =5.0v, i outp =200ma v enp ="h", v enn ="l", v mode ="h")
22/38 XC9519 series notes on use (continued) 10. during pwm control (v mode = "l"), the output voltage may become unstable at light loads. 11. torex places an importance on impr oving our products and their reliability. we request that users incorporate fail-sa fe designs and post-aging protec tion treatment when using torex products in their syst ems. time:50 s/div v out n 4?+0= c ln =44.7 f l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03 r zn =200k ? , c zn =0.47nf inverting dc converter: pwm mode (v in =5.5v, v outn =-15.0v, i outn =100ma v enp ="l", v enn ="h", v mode ="l")
23/38 XC9519 series notes on use (continued) notes on layout 1. position external components close to the ic so that the wiring is thick and short. 2. to minimize input voltage fluctuations, place c in_p and c in_a as close as possible to the ic. 3. make the gnd wiring sufficiently strong. fluctuations of agnd or pgnd voltage due to gnd current during switching may cause unstable ic operation. 4. when creating a layout, refer to the circuit diagram and recommended layout pattern below. 5. this product is incorporated into a driver, and thus the dr iver transistor current and on-resistance may cause heat generati on. enp fbn pgnd l p v in fbp lxp enn bsw vref lxn pvin avin agnd sbd p c in_a l n r fbn2 r fbn1 c lp c ln sbd n v outp c l_vr gainp r zn c zp c zn r zp gainn voutp c in_p v outn mode voutn swp p-ch mos c in_sw c fbp r sp r fbp1 r fbp2 recommended pattern layout front back side see-through
24/38 XC9519 series 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outp (ma) efficiency:effi(% ) 3.6v 2.7v v in = 4.4v v enp ="h",v enn ="l" pwm/pfm (v mode ="h") pwm (v mode ="l") 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outn (ma) efficiency:effi(% ) 3.6v 2.7v v in = 4.4v v enp ="l",v enn ="h" pwm/pfm (v mode ="h") pwm (v mode ="l") 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outp (ma) efficiency:effi(% ) 3.6v v in = 5.5v v enp ="h",v enn ="l" pwm/pfm (v mode ="h") pwm (v mode ="l") 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outn (ma) efficiency:effi(% ) 3.6v v enp ="l",v enn ="h" v in = 5.5v pwm/pfm (v mode ="h") pwm (v mode ="l") (2) output voltage vs. output current 4.8 4.9 5.0 5.1 5.2 0.1 1 10 100 1000 output current:i outp (ma) output voltage:v outp (v) v in 4.4v,3.6v,2.7v v enp ="h",v enn ="l" pwm/pfm (v mode ="h") pwm (v mode ="l") -5.2 -5.1 -5.0 -4.9 -4.8 0.1 1 10 100 1000 output current:i outn (ma) output voltage:v outn (v) v enp ="l",v enn ="h" pwm/pfm (v mode ="h") pwm (v mode ="l") 2.7v v in 4.4v 3.6v c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =7.5k ? , c zp =4.7nf step-up dc/dc converter (v outp =5.0v) (1) efficiency vs. output current c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter (v outn =-5.0v) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf step-up dc/dc converter (v outp =15.0v) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter (v outn =-15.0v) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =7.5k ? , c zp =4.7nf step-up dc/dc converter (v outp =5.0v) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter (v outn =-5.0v) typical performance characteristics
25/38 XC9519 series (2) output voltage vs. ou tput current (continued) 14.6 14.8 15.0 15.2 15.4 0.1 1 10 100 1000 output current:i outp (ma) output voltage:v outp (v) v in 5.5v v enp ="h",v enn ="l" pwm/pfm (v mode ="h") pwm (v mode ="l") 3.6v -15.4 -15.2 -15.0 -14.8 -14.6 0.1 1 10 100 1000 output current:i outn (ma) output voltage:v outn (v) v in 5.5 v,3.6v v enp ="l",v enn ="h" pwm/pfm (v mode ="h") pwm (v mode ="l") (3) ripple voltage vs. output current 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outp (ma) ripple voltage : vr(mvp-p) 3.6v 2.7v 4.4v v enp ="h",v enn ="l" pwm/pfm (v mode ="h") pwm (v mode ="l") v in = 2.7v,3.6v,4.4v 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outn (ma) ripple voltage : vr(mvp-p) 2.7v v enp ="l",v enn ="h" pwm/pfm (v mode ="h") pwm (v mode ="l") v in = 2.7v,3.6v,4.4v 3.6v 4.4v 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outp (ma) ripple voltage : vr(mvp-p) 2.7v v enp ="h",v enn ="l" pwm/pfm (v mode ="h") pwm (v mode ="l") v in = 2.7v,3.6v,4.4v 5.5v 3.6v 0 20 40 60 80 100 0.1 1 10 100 1000 output current:i outn (ma) ripple voltage : vr(mvp-p) v enp ="l",v enn ="h" pwm/pfm (v mode ="h") pwm (v mode ="l") 3.6v 2.7v v in = 5.5v typical performance characteristics (continued) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf ste p -u p dc/dc converte r ( v outp =15.0v ) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf invertin g dc/dc converte r ( v outn =-15.0v ) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =7.5k ? , c zp =4.7nf step-up dc/dc converter (v outp =5.0v) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter (v outn =-5.0v) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf ste p -u p dc/dc converte r ( v outp =15.0v ) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter (v outn =-15.0v)
26/38 XC9519 series 0.9 1.0 1.1 1.2 1.3 1.4 1.5 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) oscillation freq uency : f oscp (mhz) v in =5.5v 3.6v 2.7v 0.9 1.0 1.1 1.2 1.3 1.4 1.5 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) oscillation fr equency : f os cn (mhz) v in =5.5v 3.6v 2.7v (5) supply current 1,2,3 vs. ambient temperature 50 100 150 200 250 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) supply current 1: i dd1 ( a) v in =5.5v 2.7v 0 50 100 150 200 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) supply current 2: i dd2 ( a) v in =5.5v 2.7v 0 50 100 150 200 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) supply current 3: i dd3 ( a) v in =5.5v 2.7v typical performance characteristics (continued) (4) oscillation frequency vs. ambient temperature supply current 1 supply current 2 supply current 3
27/38 XC9519 series 0.98 0.99 1.00 1.01 1.02 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) fbp voltage : v fbp (v) v in =5.5v 2.7v,3.6v 0.98 0.99 1.00 1.01 1.02 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) output voltage accuracy : v outna (v) v in =5.5v 3.6v 2.7v (8) uvlo voltage vs. ambient temperature 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 -50-25 0 25 50 75100 ambient temperature: ta ( ) uvlo voltage : uvlo (v) uvlo release voltage uvlo detect voltage v enp ="h",v enn ="l",v mode ="l" (9) enp "h" voltage vs. ambient temperature 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 -50-250 255075100 ambient temperature: ta ( ) enp "h" voltage : v enph (v) v in =5.5v,v enn ="l",v mode ="l" 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) enp "l" voltage : v enpl (v) v in =5.5v,v enn ="l",v mode ="l" typical performance characteristics (continued) (6) fbp voltage vs. ambient temperature (7) ou tput voltage accuracy vs. ambient temperature (10) enp "l" voltage vs. ambient temperature
28/38 XC9519 series 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) enn "h" voltage : v ennh (v) v in =5.5v,v enp ="l",v mode ="l" 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) enn "l" voltage : v ennl (v) v in =5.5v,v enp ="l",v mode ="l" (13) mode "h" voltage vs. ambient temperature 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) mode "h" voltage : v modeh (v) v in =5.5v,v enp ="h",v enn ="l" 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) mode "l" voltage : v model (v) v in =5.5v,v enp ="h",v enn ="l" (15) lxp sw ?h? on resistance vs. ambient temperature 0.0 0.1 0.2 0.3 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) 3.6v v in =5.5v lxp sw ?h? on resistance :r lxph ( ? ) 2.7v 0.0 0.1 0.2 0.3 0.4 0.5 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) 3.6v v in =5.5v lxn sw ?l? on resistance :r lxnl ( ? ) 2.7v (11) enn "h" voltage vs. ambient temperature (12) enn "l" voltage vs. ambient temperature (14) mode "l" voltage vs. ambient temperature (16) lxn sw "l" on resistance vs. ambient temperature typical performance characteristics ( continued )
29/38 XC9519 series (18) soft start time vs. ambient temperature 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -50-25 0 25 50 75100 ambient temperature: ta ( ) soft start time : t ssp (ms) v in =5.5v 3.6v 2.7v 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -50-25 0 25 50 75100 ambient temperature: ta ( ) soft start time : t ssn (ms) v in =5.5v 3.6v 2.7v (19) maximum duty cycle vs. ambient temperature 84 86 88 90 92 94 96 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) maximum duty cycle : d maxp (%) v in =3.6v,v enp ="h",v enn ="l",v mode ="l" 84 86 88 90 92 94 96 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) maximum duty cycle : d maxn (%) v in =3.6v,v enp ="l",v enn ="h",v mode ="l" step-up dc/dc converter inverting dc/dc converter typical performance characteristics (continued) (17) output voltage rise wave form c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf ste p -u p dc/dc converte r ( v outp =15.0v ) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter (v outn =-15.0v) step-up dc/dc converter inverting dc/dc converter ?*/ */ v in =3.6v,v en n ="l",v mod e ="l" v en p = 0 e 3.6v v outp 1ch:5v/div, 2ch:5v/div time:500 s/div ?*/ */ v en n = 0 e 3.6v v outn 1ch:5v/div, 2ch:5v/div time:500 s/div v in =3.6v,v en p ="l",v mod e ="l"
30/38 XC9519 series 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) maximum current limit : i limp (a) v in =4.4v 3.6v 2.7v v enp ="h",v enn ="l",v mode ="l" 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) maximum current limit : i limn (a) v in =4.4v 3.6v 2.7v v enp ="l",v enn ="h",v mode ="l" 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) maximum current limit : i limp (a) v in =5.5v 3.6v v enp ="h",v enn ="l",v mode ="l" 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) maximum current limit : i limn (a) v in =5.5v 3.6v v enp ="l",v enn ="h",v mode ="l" (21) latch time vs. ambient temperature 1.0 1.5 2.0 2.5 3.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) 3.6v v in =5.5v integral latch time :t lat (ms) 2.7v typical performance characteristics (continued) (20) maximum current limit vs. ambient temperature c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =7.5k ? , c zp =4.7nf step-up dc/dc converter (v outp =5.0v) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter (v outn =-5.0v) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf step-up dc/dc converter (v outp =15.0v) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter (v outn =-15.0v)
31/38 XC9519 series 100 150 200 250 300 350 400 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) 3.6v v in =5.5v c l discharge resistance: r dchgp ( ? ) 2.7v 100 150 200 250 300 350 400 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) 3.6v v in =5.5v c l discharge resistance: r dchgn ( ? ) 2.7v (23) pfm switching current vs. ambient temperature 150 200 250 300 350 400 450 500 550 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) pfm switching current : i pfmp (ma) v in =4.4v 3.6v v enp ="h",v enn ="l",v mode ="h" 150 200 250 300 350 400 450 500 550 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) pfm switching current : i pfmn (ma) v in =4.4v 3.6v v enp ="l",v enn ="h",v mode ="h" 150 200 250 300 350 400 450 500 550 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) pfm switching current : i pfmp (ma) v in =5.5v 3.6v v enp ="h",v enn ="l",v mode ="h" 150 200 250 300 350 400 450 500 550 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) pfm switching current : i pfmn (ma) v in =5.5v 3.6v v enp ="h",v enn ="l",v mode ="h" typical performance characteristics (continued) (22) c l discharge resistance vs. ambient temperature step-up dc/dc converter inverting dc/dc converter c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =7.5k ? , c zp =4.7nf step-up dc/dc converter (v outp =5.0v) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter (v outn =-5.0v) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf step-up dc/dc converter (v outp =15.0v) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter (v outn =-15.0v)
32/38 XC9519 series typical performance characteristics (continued) (24) load transient response c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0), sbd p : cms03 p-ch mos: emh1303, r zp =8.2k ? , c zp =4.7nf, c fbp =47pf, r sp =4.7k ? step-up dc/dc converter: pwm/pfm mode (v in =3.6v, v outp =5.0v, i outp =1 ? 200ma) step-up dc/dc converter: pwm mode (v in =3.6v, v outp =5.0v, i outp =200 ? 1ma) step-up dc/dc converter: pwm/pfm mode (v in =3.6v, v outp =5.0v, i outp =1 ? 200ma) step-up dc/dc converter: pwm/pfm mode (v in =3.6v, v outp =5.0v, i outp =200 ? 1ma) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0), sbd p : cms03 p-ch mos: emh1303, r zp =8.2k ? , c zp =4.7nf, c fbp =47pf, r sp =4.7k ? c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0), sbd p : cms03 p-ch mos: emh1303, r zp =8.2k ? , c zp =4.7nf, c fbp =47pf, r sp =4.7k ? c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0), sbd p : cms03 p-ch mos: emh1303, r zp =8.2k ? , c zp =4.7nf, c fbp =47pf, r sp =4.7k ? ?*/ */ i outp = 200 e 1ma v outp 1ch:200mv/div, 2ch:200ma/div t ime:1ms /div v en p ="h",v en n ="l",v mod e ="l" ?*/ */ i outp = 200 e 1ma v outp 1ch:200mv/div, 2ch:200ma/div t ime:1ms /div v en p ="h",v en n ="l",v mod e ="h" ?*/ */ i outp = 1 e 200ma v outp 1ch:200mv/div, 2ch:200ma/div time:100 s/div v en p ="h",v en n ="l",v mod e ="l" ?*/ */ i outp = 1 e 200ma v outp 1ch:200mv/div, 2ch:200ma/div time:100 s/div v en p ="h",v en n ="l",v mod e ="h"
33/38 XC9519 series typical performance characteristics (continued) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf step-up dc/dc converter: pwm mode (v in =3.6v, v outp =15.0v, i outp =1 ? 50ma) step-up dc/dc converter: pwm mode (v in =3.6v, v outp =15.0v, i outp =50 ? 1ma) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf step-up dc/dc converter: pwm/pfm mode (v in =3.6v, v outp =15.0v, i outp =1 ? 50ma) step-up dc/dc converter: pwm/pfm mode (v in =3.6v, v outp =15.0v, i outp =50 ? 1ma) c lp =44.7 f, l p =3.3 h (vlf5014s-3r3m2r0) sbd p : cms03, p-ch mos: emh1303, r zp =27k ? , c zp =2.2nf ?*/ */ i outp = 50 e 1ma v outp 1ch:500mv/div, 2ch:50ma/div t ime:1ms /div v en p ="h",v en n ="l",v mod e ="l" ?*/ */ i outp = 50 e 1ma v outp 1ch:500mv/div, 2ch:50ma/div t ime:1ms /div v en p ="h",v en n ="l",v mod e ="h" ?*/ */ i outp = 1 e 50ma v outp 1ch:500mv/div, 2ch:50ma/div time:200 s/div v en p ="h",v en n ="l",v mod e ="l" ?*/ */ i outp = 1 e 50ma v outp 1ch:500mv/div, 2ch:50ma/div time:200 s/div v en p ="h",v en n ="l",v mod e ="h"
34/38 XC9519 series typical performance characteristics (continued) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter: pwm mode (v in =3.6v, v outn =-5.0v, i outn =1 ? 200ma) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter: pwm mode (v in =3.6v, v outn =-5.0v, i outn =200 ? 1ma) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter: pwm/pfm mode (v in =3.6v, v outn =-5.0v, i outn =1 ? 200ma) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =130k ? , c zn =0.47nf inverting dc/dc converter: pwm/pfm mode (v in =3.6v, v outn =-5.0v, i outn =200 ? 1ma) ?*/ */ i outn = 1 e 200ma v outn 1ch:200mv/div, 2ch:200ma/div time:100 s/div v en p ="l",v en n ="h",v mod e ="l" ?*/ */ i outn = 200 e 1ma v outn 1ch:200mv/div, 2ch:200ma/div time:500 s/div v en p ="l",v en n ="h",v mod e ="l" ?*/ */ i outn = 1 e 200ma v outn 1ch:200mv/div, 2ch:200ma/div time:100 s/div v en p ="l",v en n ="h",v mod e ="h" ?*/ */ i outn = 200 e 1ma v outn 1ch:200mv/div, 2ch:200ma/div time:500 s/div v en p ="l",v en n ="h",v mod e ="h"
35/38 XC9519 series typical performance characteristics (continued) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter: pwm mode (v in =3.6v, v outn =-15.0v, i outn =1 ? 50ma) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter: pwm mode (v in =3.6v, v outn =-15.0v, i outn =50 ? 1ma) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter: pwm/pfm mode (v in =3.6v, v outn =-15.0v, i outn =1 ? 50ma) c ln =44.7 f, l n =3.3 h (vlf5014s-3r3m2r0) sbd n : cms03, r zn =200k ? , c zn =0.47nf inverting dc/dc converter: pwm/pfm mode (v in =3.6v, v outn =-15.0v, i outn =50 ? 1ma) ?*/ */ ?*/4?+0=?*/4?+0= ;04,?:?+0= ?*/ */ i outn = 1 e 50ma v outn 1ch:500mv/div, 2ch:50ma/div time:100 s/div v en p ="l",v en n ="h",v mod e ="l" ?*/ */ ?*/4?+0=?*/4?+0= ;04,:?+0= ?*/ */ i outn = 50 e 1ma v outn 1ch:500mv/div, 2ch:50ma/div time:500 s/div v en p ="l",v en n ="h",v mod e ="l" ?*/ */ ?*/4?+0=?*/4?+0= ;04,?:?+0= ?*/ */ i outn = 1 e 50ma v outn 1ch:500mv/div, 2ch:50ma/div time:100 s/div v en p ="l",v en n ="h",v mod e ="h" ?*/ */ ?*/4?+0=?*/4?+0= ;04,:?+0= ?*/ */ i outn = 50 e 1ma v outn 1ch:500mv/div, 2ch:50ma/div time:500 s/div v en p ="l",v en n ="h",v mod e ="h"
36/38 XC9519 series packaging information qfn-24 (unit:mm) qfn-24 reference pattern layout (unit:mm) qfn-24 reference metal mask design (unit:mm) 789 1 2 3 4 5 6 1 pin indent 4.00.10 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 2.80.05 0.400.05 0.075
37/38 XC9519 series marking rule ? represent product series. mark product series 9 XC9519******-g ? represents uvlo detect voltage. mark uvlo voltage product series a detect: 2.2v, hysteresis width: 0.2v XC9519a*****-g ?? represents oscillation frequency and maximum current limit. mark ? ? oscillation frequency maximum current limit product series 1 2 1.2mhz 2.0a XC9519*12a**-g ?? represents production lot number. ??????? 01 ? 09, 0a ? 0z, 11 ? 9z, a1 ? a9, aa ? az, and b1 ? zz repeated (g, i, j, o, q, w excluded) *no character inversion used. 1pin qfn-24 ??????
38/38 XC9519 series 1. the products and product specifications cont ained herein are subject to change without notice to improve performance characteristic s. consult us, or our representatives before use, to confirm that the informat ion in this datasheet is up to date. 2. we assume no responsibility for any infri ngement of patents, pat ent rights, or other rights arising from the use of any information and circuitry in this datasheet. 3. please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this datasheet. 4. the products in this datasheet are not devel oped, designed, or approved for use with such equipment whose failure of malfuncti on can be reasonably expected to directly endanger the life of, or cause significant injury to, the user. (e.g. atomic energy; aerospace; transpor t; combustion and associated safety equipment thereof.) 5. please use the products listed in this datasheet within the specified ranges. should you wish to use the products under conditions exceeding the specifications, please consult us or our representatives. 6. we assume no responsibility for damage or loss due to abnormal use. 7. all rights reserved. no part of this dat asheet may be copied or reproduced without the prior permission of torex semiconductor ltd.

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