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njw4153 - 1 - ver.2013-03-21 switching regulator ic for buck converter current mode control w/ 40v/1a mosfet general description package outline features current mode control maximum rating input voltage 45v wide operating voltage range 4.6v to 40v switching current 1.4a min. pwm control built-in compensation circuit correspond to ceramic capacitor (mlcc) oscillating frequency 1mhz typ. (a ver.) soft start function 4ms typ. uvlo (under voltage lockout) over current protection (hiccup type) thermal shutdown protection standby function package outline njw4153u2 : sot-89-5 njw4153kv1 : eson8-v1 product classification part number version oscillation frequency package operating temperature range NJW4153U2-A a 1mhz typ. sot-89-5 general spec. -40 c to +85 c njw4153kv1-a a 1mhz typ. eson8-v1 general spec. -40 c to +85 c the njw4153 is a buck converter with 40v/1a mosfet. it corresponds to high oscillating frequency, and low esr output capacitor (mlcc) within wide input range from 4.6v to 40v. therefore, the njw4153 can realize downsizing of applications with a few external parts so that adopts current mode control. also, it has a soft start function, an over current protection and a thermal shutdown circuit. it is suitable for power supply circuit of micro processor, dsp and so on that need fast transient response. njw4153u2 njw4153kv1
njw4153 - 2 - ver.2013-03-21 pin configuration block diagram v + in- er ? amp buffer ocp current sense tsd vref sof t start uv lo slope comp. 0.8v s q r osc gnd high: on low : off (standby) on/off sw pwm standby on/off low frequency control 450k ? pin function 1. on/off 2. gnd 3. in- 4. sw 5. v + njw4153u2 1 2 3 4 5 (2) njw4153kv1 1 2 3 4 exposed pad on backside connect to gnd. 8 7 6 5 1 2 3 4 8 7 6 5 (top view) (bottom view) pin function 1. sw 2. n.c. 3. v + 4. n.c. 5. on/off 6. gnd 7. n.c. 8. in-
njw4153 - 3 - ver.2013-03-21 absolute maximum ratings (ta=25c) parameter symbol maximum ratings unit supply voltage v + +45 v v + - sw pin voltage v v-sw +45 v in- pin voltage v in- -0.3 to +6 v on/off pin voltage v on/off +45 v power dissipation p d sot-89-5 eson8-v1 625 (*1) 2,400 (*2) 600 (*3) 1,800 (*4) mw junction temperature range tj -40 to +150 c operating temperature range t opr -40 to +85 c storage temperature range t stg -40 to +150 c (*1): mounted on glass epoxy board. (76.2114.31.6mm:based on eia/jdec standard size, 2layers, cu area 100mm 2 ) (*2): mounted on glass epoxy board. (76.2114.31.6mm:based on eia/jdec standard, 4layers) (for 4layers: applying 74.274.2mm inner cu area and a thermal via hall to a board based on jedec standard jesd51-5) (*3): mounted on glass epoxy board. (101.5 114.5 1.6mm: based on eia/jedec standard, 2layers fr-4, with exposed pad) (*4): mounted on glass epoxy board. (101.5 114.5 1.6mm: based on eia/jedec standard, 4layers fr-4, with exposed pad) (for 4layers: applying 99.5 99.5mm inner cu area and a thermal via hole to a board based on jedec standard jesd51-5) recommended operating conditions parameter symbol min. typ. max. unit supply voltage v + 4.6 ? 40 v
njw4153 - 4 - ver.2013-03-21 electrical characteristics (unless otherwise noted, v + =v on/off =12v, ta=25 c) parameter symbol test condition min. typ. max. unit under voltage lockout block on threshold voltage v t_on v + = l h 4.3 4.45 4.6 v off threshold voltage v t_off v + = h l 4.2 4.35 4.5 v hysteresis voltage v hys 70 100 ? mv soft start block soft start time t ss v b =0.75v 2 4 8 ms oscillator block oscillation frequency f osc a version, v in- =0.7v 900 1,000 1,100 khz oscillation frequency (low frequency control) f osc_low v in- =0.4v ? 370 ? khz oscillation frequency deviation (supply voltage) f dv v + =4.6 to 40v ? 1 ? % oscillation frequency deviation (temperature) f dt ta = - 4 0 c to +85 c ? 5 ? % error amplifier block reference voltage v b -1.0% 0.8 +1.0% v input bias current i b -0.1 ? +0.1 a pwm comparate block maximum duty cycle m ax d uty v in- =0.7v 85 90 ? % minimum on time t on-min ? 140 180 ns over current protection block cool down time t cool ? 8 ? ms output block output on resistance r on i sw =1a ? 0.45 0.75 ? switching current limit i lim 1.4 1.9 2.4 a sw leak current i leak v on/off =0v, v + =45v, v sw =0v ? ? 1 a on/off block on control voltage v on v on/off = l h 1.6 ? v + v off control voltage v off v on/off = h l 0 ? 0.5 v pull-down resistance r pd ? 450 ? k ? general characteristics quiescent current i dd r l =no load, v in- =0.7v ? 3.9 4.4 ma standby current i dd_stb v on/off =0v ? ? 1 a
njw4153 - 5 - ver.2013-03-21 typical applications sw gnd in- v + njw4153 on/off c fb r2 c out l sbd v in c in r1 v out on/off high: on low: off (standby)
njw4153 - 6 - ver.2013-03-21 typical characteristics reference voltage vs. supply voltage (ta=25c) 0.79 0.795 0.8 0.805 0.81 0 10203040 supply voltage v + (v) reference voltage v b (v) quiescent current vs. supply voltage (r l =no load, v in- =0.7v, ta=25c) 0 1 2 3 4 5 0 10203040 supply voltage v + (v) quiescent current i dd (ma) oscillation frequency vs. supply voltage (a ver., v in- =0.7v, ta=25c) 980 990 1000 1010 1020 0 10203040 supply voltage v + (v) oscillation frequnecny f osc (khz)
njw4153 - 7 - ver.2013-03-21 typical characteristics reference voltage vs. temperature (v + =12v) 0.790 0.795 0.800 0.805 0.810 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) reference voltage v b (v) switching current limit vs. temperature 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) switching current limit i lim (a) v + =4.6v v + =40v v + =12v output on resistance vs. temperature (i sw =1a) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) output on resistance r on ( ? ) v + =4.6v v + =12v v + =40v under voltage lockout voltage vs. temperature 4.3 4.35 4.4 4.45 4.5 4.55 4.6 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) threshold voltage (v) v t_on v t_off soft start time vs. temperature (v + =12v, v b =0.75v) 2 3 4 5 6 7 8 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) soft start time tss (ms) oscillation frequency vs temperature (a ver., v + =12v, v in- =0.7v) 850 900 950 1000 1050 1100 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) oscillation frequency fosc (khz)
njw4153 - 8 - ver.2013-03-21 typical characteristics quiescent current vs. temperature (r l =no load, v in- =0.7v) 2 2.5 3 3.5 4 4.5 5 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) quiescent current i dd (ma) v + =40v v + =12v v + =4.6v standby current vs. temperature (v on/off =0v) 0 0.2 0.4 0.6 0.8 1 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) standby current i dd_stb (a) v + =40v v + =12v v + =4.6v switching leak current vs. temperature (v + =45v,v on/off =0v, v sw =0v) 0 1 2 3 4 5 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) switching leak current i leak (a) minimum on time vs. temperature (v + =12v) 100 110 120 130 140 150 160 170 180 190 200 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) minimum on time t on-min [ns] maximum duty cycle vs. temperature (v + =12v, v in- =0.7v) 85 86 87 88 89 90 91 92 93 94 95 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) maximum duty cycle m ax d uty (%)
njw4153 - 9 - ver.2013-03-21 pin descriptions pin number pin name sot-89-5 eson8 function on/off 1 5 on/off control pin the on/off pin internally pulls down with 450k ? . normal operation at the time of high level . standby mode at the time of low level or open. gnd 2 6 gnd pin in- 3 8 output voltage detecting pin connects output voltage through the resistor divider tap to this pin in order to voltage of the in- pin become 0.8v. sw 4 1 switch output pin of power mosfet v + 5 3 power supply pin for power line n.c. ? 2, 4, 7 non connection exposed pad ? ? connect to gnd (only esop8 pkg) technical information njw 41 5 3 application manual
njw4153 - 10 - ver.2013-03-21 description of block features 1. basic functions / features error amplifier section (er ? amp) 0.8v1% precise reference voltage is connecte d to the non-inverted input of this section. to set the output voltage, connects converter's output to inve rted input of this section (in- pin). if requires output voltage over 0.8v, inserts resistor divider. because the optimized compensation circuit is built-in , the application circuit can be composed of minimum external parts. pwm comparator section (pwm), oscillation circuit section (osc) the njw4153 uses a constant frequency, current mode st ep down architecture. the oscillation frequency is 1,000khz (typ.) at a version. the pwm signal is outp ut by feedback of output voltage and slope compensation switching current at the pwm comparator block. the maximum duty ratio is 90% (typ.). the minimum on time is limited to 140nsec (typ.). the buck converter of on time is decided the following formula. [] s f v v ton osc in out = v in shows input voltage and v out shows output voltage. when the on time becomes below in t on-min , in order to maintain output voltage at a stable state, change of duty or pulse skip operation may be performed. power mosfet (sw output section) the power is stored in the inductor by the switch operati on of built-in power mosfet. the output current is limited to 1.4a(min.) the overcurrent protection function. in case of step-down converter, the forward direction bias voltage is generated with inductance current that flows into the ex ternal regenerative diode when mosfet is turned off. the sw pin allows voltage between the v + pin and the sw pin up to +45v. howe ver, you should use an schottky diode that has low saturation voltage. power supply, gnd pin (v + and gnd) in line with switching element drive, current flows into the ic according to frequency. if the power supply impedance provided to the power supply circuit is high, it will not be possible to take advantage of ic performance due to input voltage fluctuation. therefore insert a bypass capacitor close to the v + pin ? the gnd pin connection in order to lower high frequency impedance. technical information njw 41 5 3 application manual
njw4153 - 11 - ver.2013-03-21 description of block features (continued) 2. additional and protection functions / features under voltage lockout (uvlo) the uvlo circuit operating is released above v + =4.45v(typ.) and ic operation starts. when power supply voltage is low, ic does not operate because the uvlo circuit operates . there is 100mv(typ.) width hysteresis voltage at rise and decay of power supply voltage. hysteresis prevent s the malfunction at the time of uvlo operating and releasing. soft start function (soft start) the output voltage of the converter gradually rises to a set value by the soft start function. the soft start time is 4ms (typ.). it is defined with the time of the error amplif ier reference voltage becoming from 0v to 0.75v. the soft start circuit operates after the release uvlo and/or recovery from thermal shutdown. the operating frequency is controlled with a low frequency 370khz, until volt age or the in- pin becomes approximately 0.65v. sw pin 0.8v on off vref, in- pin voltage osc wavef orm steady operaton uvlo(4.45v typ.) release, standby, recover from thermal shutdow n soft start effective period to v b =0.8v soft start time: tss=4ms(typ.) to v b =0.75v low frequency control v in- =approx 0.65v fig. 1. startup timing chart technical information njw 41 5 3 application manual
njw4153 - 12 - ver.2013-03-21 description of block features (continued) over current protection circuit (ocp) njw4153 contains overcurrent protection circuit of hiccup architecture. the overcurrent protection circuit of hiccup architecture is able to decrease heat generation at the overload. the njw4153 output returns automatically along wi th release from the over current condition. at when the switching current becomes i lim or more, the overcurrent protecti on circuit is stopped the mosfet output. the switching output holds low level dow n to next pulse output at ocp operating. when in- pin voltage becomes 0.5v or less, it operates with 370khz (typ.). at the same time starts pulse counting, and stops the switching operation when the overcurrent detection continues approx 1ms. after njw4153 switching operation was stopped, it restarts by soft start function after the cool down time of approx 8ms (typ.). sw pin on off sw itching current i lim 0 0.8v 0.5v 0v in- pin voltage ocp operates oscillation frequency f osc_lim =370khz typ. cool dow n time :8ms typ. oscillation fr equency fosc=1mhz typ. static status detec t overcurrent sof t start pulse by pu ls e pulse count :about 1ms fig. 2. timing chart at over current detection thermal shutdown function (tsd) when junction temperature of the njw4153 exceeds the 165c*, internal thermal shutdown circuit function stops sw function. when junction temperature decreases to 150c* or less, sw operation returns with soft start operation. the purpose of this function is to prevent malfunctioning of ic at the high junction temperature. therefore it is not something that urges positive use. you should make sure to operate within the junction temperature range rated (150 c). (* design value) on/off function the njw4153 stops the operating and becomes standby stat us when the on/off pin becomes less than 0.5v. the on/off pin internally pulls down with 450k ? , therefore the njw4153 becomes standby mode when the on/off pin is open. you should connect this pin to v + when you do not use standby function. technical information njw 41 5 3 application manual
njw4153 - 13 - ver.2013-03-21 application information inductors because a large current flows to the inductor, you should se lect the inductor with the la rge current capacity not to saturate. optimized inductor value is determ ined by the input voltage and output voltage. the optimized inductor value: (it is a reference value.) v iin =12v v out =5.0v : l < = 10 h v iin =24v v out =5.0v : l < = 10 h you should set the inductor as a guide from above mentioned value to half value. reducing l decreases the size of the inductor. howeve r a peak current increases and adversely affects the efficiency. (fig. 3.) moreover, you should be aware that the output current is limited because it becomes easy to operating to the overcurrent limit. the peak current is decided the following formula. () ] a [ f v l v v v i osc in out out in l ? = ? ] a [ i i ipk l out 2 ? + = output current i out indunctor ripple current ? i l 0 current t on t off peak current i pk indunctor ripple current ? i l peak current i pk t on t off reducing l value increasing l value fig. 3. inductor current state transition (continuous conduction mode) technical information njw 41 5 3 application manual
njw4153 - 14 - ver.2013-03-21 application information (continued) catch diode when the switch element is in off cycle, power stored in the inductor flows via the catch diode to the output capacitor. therefore during each cycle current flows to the diode in response to load current. because diode's forward saturation voltage and current accumulation caus e power loss, a schottky barrier diode (sbd), which has a low forward saturation voltage, is ideal. an sbd also has a short reverse recovery time. if the reve rse recovery time is long, through current flows when the switching transistor transitions from off cycle to on cycle. this current may lower efficiency and affect such factors as noise generation. input capacitor transient current flows into the input section of a switch ing regulator responsive to frequency. if the power supply impedance provided to the power supply circuit is large, it will not be possible to take advantage of the njw4153 performance due to input voltage fluctuation. therefore in sert an input capacitor as close to the mosfet as possible. a ceramic capacitor is the optimal for input capacitor. the effective input current can be expressed by the following formula. () ] a [ v v v v i i in out in out out rms ? = in the above formula, the maximum current is obtained when v in = 2 v out , and the result in this case is i rms = i out (max) 2. when selecting the input capacitor, carry out an evaluati on based on the application, and use a capacitor that has adequate margin. output capacitor an output capacitor stores power from the induc tor, and stabilizes voltage provided to the output. because njw4153 corresponds to the output capacitor of low esr, the ceramic capa citor is the optimal for compensation. the optimized capacitor value: (it is a reference value.) v out =5.0v : c out > = 22 f in addition, you should consider vari ed characteristics of capacitor (a frequency characteristic, a temperature characteristic, a dc bias characteristic and so on) and unevenness peculiar to a capacitor supplier enough. therefore when selecting a capacitors, you should co nfirm the characteristics with supplier datasheets. when selecting an output capacitor, you must consider equi valent series resistance (esr ) characteristics, ripple current, and breakdown voltage. the output ripple noise can be expr essed by the following formula. ] v [ i esr v l ) p p ( ripple ? = ? the effective ripple current that flows in a capacitor (i rms ) is obtained by the following equation. ] arms [ i i l rms 3 2 ? = technical information njw 41 5 3 application manual
njw4153 - 15 - ver.2013-03-21 application information (continued) setting output voltage, compensation capacitor the output voltage v out is determined by the relative resistances of r1, r2. the current that flows in r1, r2 must be a value that can ignore the bias current that flows in er amp. ] v [ v r r v b out ? ? ? ? ? ? + = 1 1 2 the zero points are formed with r2 and c fb , and it makes for the phase compensation of njw4153. the zero point is shown the following formula . ] hz [ c r f fb z = 2 2 1 1 you should set the zero point as a guide from 30khz to 50khz. technical information njw 41 5 3 application manual
njw4153 - 16 - ver.2013-03-21 application information (continued) board layout in the switching regulator application, because the cu rrent flow corresponds to the oscillation frequency, the substrate (pcb) layout becomes an important. you should attempt the transition voltage decrease by maki ng a current loop area minimize as much as possible. therefore, you should make a current flowing line thick and short as much as possible. fig.4. shows a current loop at step-down converter. especially, should lay out high priority the loop of c in -sw-sbd that occurs rapid current change in the switching. it is effective in reduci ng noise spikes caused by parasitic inductance. c out l sbd c in v in c out l sbd c in v in njw4153 built-in sw njw4153 built-in sw (a) buck converter sw on (b) buck converter sw off fig. 4. current loop at buck converter concerning the gnd line, it is preferred to separate the power system and the signal system, and use single ground point. the voltage sensing feedback line should be as far away as possible from the inductance. because this line has high impedance, it is laid out to avoid the influence noise caused by flux leaked from the inductance. fig. 5. shows example of wiring at buck conver ter. fig. 6 shows the pcb layout example. sw gnd in- c fb r2 c out l sbd njw4153 r1 v out r l to avoid the influence of the voltage drop, the output voltage should be detected near the load. because in- pin is high impedance, the voltage detection resistance: r1/r2 is put as much as possible near ic(in-). separate digital(signal) gnd f rom pow er gnd v + c in v in the condenser is connected near an ic. fig. 5. board layout at buck converter technical information njw 41 5 3 application manual
njw4153 - 17 - ver.2013-03-21 application information (continued) c in1 c fb r fb r1 r2 v out power gnd area feed back signal gnd out gnd in v in signal gnd area c in2 on/off sbd l c out 1pin connect signal gnd line and powe r gnd line on backside pattern fig. 6. layout example (upper view) technical information njw 41 5 3 application manual
njw4153 - 18 - ver.2013-03-21 calculation of package power a lot of the power consumption of buck converter occurs from the internal switching element (power mosfet). power consumption of njw4153 is roughly estimated as follows. input power: p in = v in i in [w] output power: p out = v out i out [w] diode loss: p diode = v f i l(avg) off duty [w] njw4153 power consumption: p loss = p in ? p out ? p diode [w] where: v in : input voltage for converter i in : input current for converter v out : output voltage of converter i out : output current of converter v f : diode's forward saturation voltage i l(avg) : inductor average current off duty : switch off duty efficiency ( ) is calculated as follows. = (p out p in ) 100 [%] you should consider temperature derating to the calculated power consumption: p d . you should design power consumption in rated range referring to the power dissipation vs. ambient temperature characteristics (fig. 7). (*5): mounted on glass epoxy board. (76.2114.31.6mm:based on eia/jdec standard size, 2layers, cu area 100mm 2 ) (*6): mounted on glass epoxy board. (76.2114.31.6mm:based on eia/jdec standard, 4layers) (for 4layers: applying 74.274.2mm inner cu area and a thermal via hall to a board based on jedec standard jesd51-5) (*7): mounted on glass epoxy board. (101.5 114.5 1.6mm: based on eia/jedec standard, 2layers fr-4, with exposed pad) (*8): mounted on glass epoxy board. (101.5 114.5 1.6mm: based on eia/jedec standard, 4layers fr-4, with exposed pad) (for 4layers: applying 99.5 99.5mm inner cu area and a thermal via hole to a board based on jedec standard jesd51-5) fig. 7. power dissipation vs. am bient temperature characteristics technical information njw 41 5 3 application manual njw4153kv1 (eson8 package) power dissipation vs. ambient temperature (tj=~150c) 0 500 1000 1500 2000 2500 3000 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) power dissipation p d (mw) at on 4 layer pc board (*8) at on 2 layer pc board (*7) njw4153u2 (sot89-5 package) power dissipation vs. ambient temperature (tj=~150c) 0 500 1000 1500 2000 2500 3000 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) power dissipation p d (mw) at on 4 layer pc board (*6) at on 2 layer pc board (*5)
njw4153 - 19 - ver.2013-03-21 application design examples busk converter application circuit ic input voltage : NJW4153U2-A : v in =12v, 24v output voltage : v out =5v output current : i out =1a oscillation frequency : fosc=1mhz sw gnd in- v + njw4153 on/off sbd v in =12v, 24v c fb 22pf r2 160k ? r1 30k ? c out 22 f/25v l 10 h3.4a c in1 10 f/50v v out =5v on/off high: on low: off (standby) reference qty. part number description manufacturer ic 1 NJW4153U2-A internal 1a mosfet sw.reg. ic new jrc l 1 cdrh8d28hpnp-100n inductor 10 h, 3.4a(ta=25 c) / 2.5a(ta=100 c) sumida sbd 1 cms16 schottky diode 40v, 3a toshiba c in 1 umk325bj106mm ceramic capacitor 3225 10 f, 50v, x5r taiyo yuden c out 1 grm32eb31e226ke15 ceramic capacitor 3225 22 f, 25v, b murata c fb 1 22pf ceramic capacitor 1608 22pf, 50v, ch std. r1 1 30k ? resistor 1608 30k ? , 1%, 0.1w std. r2 1 160k ? resistor 1608 160k ? , 1%, 0.1w std. technical information njw 41 5 3 a pplication manual
njw4153 - 20 - ver.2013-03-21 application characteristics :NJW4153U2-A at v out =5.0v setting (r1=30k ? , r2=160k ? ) at v out =3.3v setting (r1=47k ? , r2=150k ? ) technical information njw 41 5 3 application manual efficiency vs. output current (a ver., v out =5v, ta=25c) 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1000 output current i out (ma) efficiency (%) f=1mhz l=10 h v in =6v v in =12v v in =18v v in =24v output voltage vs. output current (a ver., ta=25c) 4.7 4.8 4.9 5 5.1 5.2 5.3 1 10 100 1000 output current i out (ma) output voltage v out (v) v in =6v v in =12v v in =18v v in =24v f=1mhz l=10 h efficiency vs. output current (a ver., v out =3.3v, ta=25c) 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1000 output current i out (ma) efficiency (%) f=1mhz l=10 h v in =6v v in =12v v in =18v v in =24v output voltage vs. output current (a ver., ta=25c) 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 1 10 100 1000 output current i out (ma) output voltage v out (v) v in =6v v in =12v v in =18v v in =24v f=1mhz l=10 h
njw4153 - 21 - ver.2013-03-21 inverting converter application circuit sw gnd in- v + njw4153 on/off sbd on/off high: on low: off (standby) c fb optional r1 910k ? l 10 h/3.4a v in =15v c in 10 f/50v r2 51k ? v out = -15v c out 22 f/25v c c 0.47 f/50v reference qty. part number description manufacturer ic 1 NJW4153U2-A internal 1a mosfet sw.reg. ic new jrc l 1 cdrh8d28hpnp-100n inductor 10 h, 3.4a(ta=25 c) / 2.5a(ta=100 c) sumida sbd 1 cms16 schottky diode 40v, 3a toshiba c in 1 umk325bj106mm ceramic capacitor 3225 10 f, 50v, x5r taiyo yuden c out 1 grm32eb31e226ke15 ceramic capacitor 3225 22 f, 25v, b murata c c 1 grm21bb31h474ka87 ceramic capacitor 2012 0.47 f, 5 0 v, b murata c fb 0 ? (optional) optional ? r1 1 910k ? resistor 1608 910k ? , 1%, 0.1w std. r2 1 51k ? resistor 1608 51k ? , 1%, 0.1w std. technical information efficiency vs. output current (a ver. , v in =15v, v out =-15v, ta=25c) 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1000 output current i out (ma) efficiency (%) f=1mhz l=10 h output voltage vs. output current (a ver. , v in =15v, ta=25c) -17.0 -16.5 -16.0 -15.5 -15.0 -14.5 -14.0 -13.5 -13.0 1 10 100 1000 output cuurent i out (ma) output voltage v out (v) f=1mhz l=10 h
njw4153 - 22 - ver.2013-03-21 memo [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

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