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YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 1 description the YB1210 family consis ts of a series of 300ma ultra-low-noise, low dropout (ldo) linear regulators especially designed for battery-powered rf and wireless applications. the YB1210 regulator achieves a low 450mv dropout at 250ma load current of 3.3v output, ultra-low output voltage noise of 15vrms and psrr of 57db at 1khz. the YB1210 regulators are also optimized to work with low-esr and low cost ceramic capacitors reducing the amount of board space critical in hand-held devices. the YB1210 requires only 0.47 f output capacitor for stability with any load. the YB1210 consumes less than 1a in shutdown mode. other features include high output voltage accuracy and current limiting protection. the YB1210 regulators are available in sot-23 / sot-25 / sot-89 packages. typical application circuitry features ? high accuracy +-2% output voltage ? ultra-low-noise low-drop-out regulator with 1.8/2. 5/2.6/2.8/3.0v/3.3v preset outputs ? stable with 0.47f ceramic capacitor for any load ? allowable output current: 300ma ? low quiescent current: ~90a ? 450mv dropout at 250ma load (3.3v) ? only need input and output capacitors ? power saving shutdown mode (<1a) ? thermal protection shutdown ? built-in internal soft-start ? output short-circuit current limit protection ? green package (rohs) available applications ? pda, palmtops and notebook computers ? dsc, handset camera modules ? pcmcia cards, pc cameras ? usb based portable devices (mp3, pmp) ? gsm/gprs/3g rf transceiver modules ? wireless lans ? bluetooth portable radios input in en gnd out output preset on off cin=0.47uf cout=0.47uf YB1210 nc or bypass cbypass =30nf figure 1-1. sot-25 application circuit
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 2 pin name sot-25 description 1 in unregulated input supply 2 gnd ground pin 3 en pull high to enable the regulator 4 n.c. or bypass no connection for normal operation or noise bypass for ultra-low-noise operation by a 30nf cap. to gnd 5 out regulated voltage output pin name sot-23 description 1 gnd ground pin 2 out regulated voltage output 3 in unregulated input supply pin name sot-89 description 1 gnd ground pin 2 in unregulated input supply 3 out regulated voltage output pin name sot-89r description 1 out regulated voltage output 2 gnd ground pin 3 in unregulated input supply pin configuration pin description table 1 figure 1-2. sot-23 / sot-89 application circuit
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 3 ordering information marking information
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 4 function parameter conditions min typ max units input voltage range 2.0 6.0 v output voltage predefined (metal masks) 1.8 3.3 v output voltage accuracy i out = 10ma -2.0 +2.0 % output current limit short-circuit output 200 250 ma v out = 3.3v, i out = 250ma 450 550 v out = 3.0v, i out = 250ma 470 590 v out = 2.8v, i out = 250ma 500 600 v out = 2.6v, i out = 250ma 520 620 v out = 2.5v, i out = 250ma 540 640 dropout voltage (see note 1) v out = 1.8v, i out = 250ma 800 900 mv ground current i out = 0 ma 90 150 a line regulation v in = (v out +1v) to 6.0v, i out = 10 ma 0.3 0.5 %/v load regulation i out = 1ma to 250ma 1.2 3 % shutdown supply current en=0v ~0.01 a absolute maximum ratings supply voltage........................................ -0.3v to 7.0v output voltage ...............................-0.3v to (v in +0.3v) output short-circuit duration ........................... infinite junction temperature range........................... +150 storage temperatur e range ............. -65 to +150 lead temperat ure............................................ +250 thermal resistance (sot-23/25, ja).......... 280 /w thermal resistance (sot-89, ja)............... 180 /w internal power disspation (sot-23/25, pd)........0.4w internal power disspation (sot-89, pd)...........0.55w recommended operating conditions input supply voltage ................................ 2v to 6.0v operating tem perature..................... -40 to +85 esd susceptibilit y (hbm).................................. 2kv esd susceptibilit y (mm)...................................200v electrical characteristics table 3 t a = 25 , v in = ( v out + 1 v ), c in = c ou t = 0.47f, v en = v in
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 5 f = 100hz, i out =1ma 55 f = 1khz, i out =1ma 57 ripple rejection (psrr) f = 10khz, i out =1ma 55 db f = 100hz to 100khz, iload=10ma, bypass=0nf 45 vrms output noise voltage f = 100hz to 100khz, iload=10ma, bypass=30nf 15 vrms shutdown exit delay (see note 2) rload=50ohm 45 300 s en logic low level v in =2.0v to 5.5v 0.4 v en logic high level v in =2.0v to 5.5v 1.2 vin v en input bias current v in =5.5v, shdn=0v or 6v 0.01 a thermal shutdown shutdown temperature 160 thermal-shutdown hysteresis 20 note1 : the drop out voltage varies depending on output voltage selection dropout is defined as v in ? v out when v out is 100mv below v out where vin=vout + 1v for nominal v out . note 2: time needed for v out to reach 90% of final value. typical characteristics at t a =25 , v in =(v out +0.5v), c in =c out =0.47f, v en =v in , unless otherwise noted. dropout voltage vs load current 0 100 200 300 400 500 600 700 800 900 0 10 30 50 70 90 110 130 150 170 190 210 230 250 load current (ma) dropout voltage (mv) ground curre nt vs . input voltage 0 20 40 60 80 100 120 140 0.0 1.0 2.0 3.0 4.0 5.0 input voltage (v) ground current (a) vo = 3 . 3 v vo=1.8v vo=3.3v vo=2.5v
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 6 dropout voltage vs temperature 0 100 200 300 400 500 600 700 0 10 30 50 70 90 110 130 150 170 190 210 230 250 load current (ma) dropout voltage (mv) output voltage vs. temperature 2.81 2.82 2.83 2.84 2.85 2.86 2.87 2.88 2.89 25 35 45 55 65 75 85 temperature ( ) output voltage (v) shutdown exit delay vo = 2 . 8 4 v r load =50 ? shutdown volta g e iload=80ma iload=1ma 25 85 vo=2.8v
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 7 line transient response shutdown delay load transient response 3.34v c in = 0.47f c out = 0.47f i l o a d = 100 a 5v c in = 0.47f c out = 0.47f v in = 3.34v 100ma 100 a shutdown volta g e vout rload=50 ?
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 8 shutdown and power-on control thermal sensor error amp reference and noise bypass mos driver with limit in gnd en out p figure 3. block diagram functional block diagram functional description the YB1210 is an ultra-low-noise, low-quiescent current, low-dropout linear regulator. it is supplied in a sot-23 / sot-25 / sot-89 package for different applications. these devices can supply loads up to 250ma. as shown in the functional block diagram , the YB1210 consists of a reference and noise bypass circuit, error amplifier, output drive transistor, internal feedback voltage divider, thermal sensor, and short circuit current limiter. the internal reference is connected to the error amplifier?s inverting input. the error amplifier compares this reference with the feedback voltage and amplifies the difference. if the feedba ck voltage is lower than the reference voltage, the pass-transistor gate is pulled low. this allows more current to pass to the output and increases the out put voltage. if the feedback voltage is too high, the pass transistor gate is pulled high, allowing less current to pass to the output. the parts are available with pres et output voltages ranging from 1.8v to 3.3v. stability the YB1210 is a high performance ldo emphasizing stability with low output capacitance. it is able to maintain stability with an output capacitor as low as 0.47uf. the output capacitor can also be increased to optimize performance. the YB1210 will remain stable and in regulation with no load, unlike many other voltage regulators. internal p-channel pass transistor the YB1210 features a low impedance p-channel mosfet pass transistor. this provides several advantages over similar
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 9 designs using a pnp pass transistor, including low operating power and longer battery life. the yb 1210 consumes only 90 a of quiescent current under most conditions. output short-circuit current limit the YB1210 includes a current limiter, which monitors and controls the pass transistor?s gate volta ge, limiting the output current to about 200ma, for example, in a short-circuit output situation. shutdown the YB1210 also feat ures a low-power active shutdown mode. it has a switch that turns off the device when disabled. this allows the output capacitor and load to discharge and de-energize the load. in the shutdown mode, the in ternal functional blocks, such as voltage reference and the error amplifier, are turned off completely, and the quiescent current is less than 1 a. thermal protection shutdown the thermal protecti on shutdown function protects the device from operating in over temperature condition. when the junction temperature exceeds +160c, the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the ic to cool down. the thermal sensor turns the pass transistor on again after the ic?s junction temperature drops to +140c. soft-start circuitry the YB1210 includes a soft -start circuitry to limit inrush current at turn-on. during power up, the output capacitor and output load are charged with a reduced output current. shortly after the initial power up, the soft-start feature is terminated and normal operation is resumed. application information enable/shutdown the YB1210 comes with an active-high enable pin that allows the regulator to be enabled. forcing the enable pin low disables the regulator and puts it into the shutdown mode. this pin cannot be left floating as it may cause an undetermined state. input/output capacitor it is recommended to use a 0.47 f capacitor on the YB1210 input and a 0.47 f capacitor on the output. for high regulation performance, larger input capacitor values and lower esrs provide better noise rejection and line-transient response. the output noise, load-transient response, stability, and power-supply rejection can be improved by using large output capacitors. low esr ceramic capacitors provide optimal performance and save space. power supply rejection and transient response the psrr and transient response can be improved by increasing the values of the input and output bypass capacitors, and through passive filtering techniques.
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 10 sot-25 package information
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 11 sot-23 package information note: 1. all dimensions are in millimeters. 2. dimension does not include mold flas h, protrusion or gate burrs shall not exceed 0.25mm per end. dimension e1 does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 per side. 3. the package top may be smaller than the package bottom. dimensions d and e1 are determined at the outermost extremes of the plastic body exclusive of mold flash, the bar burrs. gate burrs and interlead flash, but including any mismatch beteen the top and bottom of the plastic body.. 4. dimension?b? 5. does not include dambar protrusion. allowable dambar protrusion shall be 0.08mm total in excess of th e ?b?dimension at maximum material condition. the dambar cannot be located on the lower radius of th e foot . minmum space between protrusion and an adjacent lead shall not be less than 0.07mm 5. lead frame material:eftec 64t
YB1210 ? 300ma ultra-low-noise, hi gh psrr ldo regulator YB1210 mrev.1.5 www.yobon.com.tw 12 sot-89 package information

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