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1/11 XC6231 series 0v input, 500ma, high speed ldo regulators general description XC6231 series are highly precise, low noise, positive voltage ldo regulators which features high ripple rejection and low dropout. output voltage is selectable within a range of 0.9v ~ 5.5v. the series is also compatible with low esr ceramic capacitors which give added output stability. this stability can be maintained even during load fluctuations due to the excell ent transient response of the series. the curr ent limiter?s foldback circuit operates as a short-circuit protection as well as the output current limiter for the output pin. a pplications reference voltage sources multi-function power supplies features maximum output current : 500ma (600ma limit) (2.5v Q v out Q 5.5v) dropout voltage : 200mv @ 100ma operating voltage range : 2.0v 10.0v output voltage range : 0.9v 5.5v (0.1v increments) output voltage accuracy : 2% temperature coefficient : 100ppm/ (typ.) low power consumption : 35 a (typ.) high ripple rejection : 65db @ 10khz protection circuits : current limiting low esr capacitor : ceramic capacitor compatible operating ambient temperature : - 40 ~ + 85 package : sot-89-5 environmentally friendly : eu rohs compliant, pb free typical application circuits etr03090-001 typical performance characteristics 0.0 0.5 1.0 1.5 2.0 2.5 0 100 200 300 400 500 600 700 output voltage:v out (v) output current:i out (ma) ta=25 =-40 =85 v in =3.8v c in =1 f(ceramic), c l =1 f(ceramic) XC6231a182pr-g v out(t) =1.8v
2/11 XC6231 series block diagram * diodes inside the circuit are an esd protection diode and parasitic diodes. product classification ordering information XC6231a ????- designator item symbol description ? output voltage 09 55 0.9v 5.5v (100mv step) output voltage accuracy 2 2% ?- (*1) package (order unit) pr-g sot-89-5 (1,000/reel) (*1) the ?-g? suffix denotes halogen and antimony free as well as being fully eu rohs compliant.
3/11 XC6231 series pin configuration pin assignment absolute maximum ratings ta=25 parameter symbol ratings units input voltage v in -0.3 +12.0 v output current i out 700 (*1) ma output voltage v out - 0.3 v in + 0.3 or +12.0 (*2) v power dissipation sot-89-5 pd 1000 ( when mounted on board ) mw operating ambient temperature topr -40 +85 storage temperature tstg -55 +125 pin number pin name functions sot-89-5 1 v in power supply input 2 v ss ground 3 v out output 4,5 nc no connection all voltage ratings are relative to v ss (*1) use with i out less than pd/(v in -v out ) (*2) the maximum value should be either v in + 0.3 or +12.0 in the lowest
4/11 XC6231 series electrical characteristics ta=25 parameter symbol conditions min. typ. max. unit circuit output voltage v out(e) i out =30ma 0.98 v out( ) 1.02 v maximum output current i outmax v out(t) R 2.5v, v in =v out(t) +2.0v 500 - - ma v out(t) <2.5v, v in =v out(t) +2.0v 400 - - load regulation ? v out 1ma Q i out Q 100ma 15 50 mv dropout voltage1 vdif1 i out =30ma - e-1 mv dropout voltage2 vdif2 i out =100ma - e-2 mv supply current i dd v in =v out(t) +1.0v v out(t) Q 0.90v v in =2.0v - 35 70 a line regulation ? v out / ( ? v in ? v out ) v out(t) +1.0v Q v in Q 10.0v v out(t) Q 0.90v, v in R 2.0v~ i out =30ma, v out(t) Q 1.75v, i out =10ma - 0.01 0.20 %/v input voltage v in 2 10 v - output temperature characteristics ? v out / ( ? top ? v out ) i out =30ma -40 Q topr Q 85 - 100 - ppm/ power supply rejection rate psrr v in =[v out(t) +1.0]v+0.5v p-p ac v out(t) Q 1.25v v in =2.25+0.5v - ac i out =50ma, =10khz - 65 - db current limit ilim v out(t) R 2.5v, v in =v out(t) +2.0v 500 600 - ma v out(t) <2.5v, v in =v out(t) +2.0v - 600 - short circuit current ishot v in =v out(t) +2.0v v out Q 1.5, v in =3.5v - 30 - ma note (*1) unless otherwise stated, v in =v rout(t) +1.0v. however v out Q 0.9v : v in =2.0v (*2) v out(t) : set output voltage value. (*3) v out(e) : effective output voltage value. (the output voltage when an amply stabilized ?v out(t) +1.0v? is provided at the v in pin while maintaining a certain i out value). (*4) vdif is defined as follows: vdif {v in1 v out1 }. ? v out1 : 98% of output voltage when v in is input after stabilizing sufficiently at each i out . ? v in1 as input voltage is gradually reduced, the input voltage at which v out1 is output.
5/11 XC6231 series electrical characteristics symbol e-0 e-1 e-2 output voltage dropout voltage1 i out =30ma dropout voltage2 i out =100ma (v) (mv) (mv) v out(t) v out vdif1 vdif2 min max typ max typ max 0.90 0.870 0.930 1100 1110 1150 1200 1.00 0.970 1.030 1000 1010 1050 1100 1.10 1.070 1.130 900 910 950 1000 1.20 1.170 1.230 800 810 850 900 1.30 1.270 1.330 700 710 750 800 1.40 1.370 1.430 600 610 650 700 1.50 1.470 1.530 500 510 550 600 1.60 1.568 1.632 400 410 500 550 1.70 1.666 1.734 300 310 400 450 1.80 1.764 1.836 200 300 300 400 1.90 1.862 1.938 120 150 280 380 2.00 1.960 2.040 80 120 240 350 2.10 2.058 2.142 80 120 240 330 2.20 2.156 2.244 80 120 240 330 2.30 2.254 2.346 80 120 240 310 2.40 2.352 2.448 80 120 240 310 2.50 2.450 2.550 70 100 220 290 2.60 2.548 2.652 70 100 220 290 2.70 2.646 2.754 70 100 220 290 2.80 2.744 2.856 70 100 220 270 2.90 2.842 2.958 70 100 220 270 3.00 2.940 3.060 60 90 200 270 3.10 3.038 3.162 60 90 200 250 3.20 3.136 3.264 60 90 200 250 3.30 3.234 3.366 60 90 200 250 3.40 3.332 3.468 60 90 200 250 3.50 3.430 3.570 60 90 200 250 3.60 3.528 3.672 60 90 200 250 3.70 3.626 3.774 60 90 200 250 3.80 3.724 3.876 60 90 200 250 3.90 3.822 3.978 60 90 200 250 4.00 3.920 4.080 60 80 180 230 4.10 4.018 4.182 60 80 180 230 4.20 4.116 4.284 60 80 180 230 4.30 4.214 4.386 60 80 180 230 4.40 4.312 4.488 60 80 180 230 4.50 4.410 4.590 60 80 180 230 4.60 4.508 4.692 60 80 180 230 4.70 4.606 4.794 60 80 180 230 4.80 4.704 4.896 60 80 180 230 4.90 4.802 4.998 60 80 180 230 5.00 4.900 5.100 50 70 160 210 5.10 4.998 5.202 50 70 160 210 5.20 5.096 5.304 50 70 160 210 5.30 5.194 5.406 50 70 160 210 5.40 5.292 5.508 50 70 160 210 5.50 5.390 5.610 50 70 160 210
6/11 XC6231 series test circuits a v in c in =1f c l =**f v (ceramic) (ceramic) a rl v in v ss v out circuit circuit a cin=1f (ceramic) v in v in v ss v out circuit cl=**f (ceramic) v v i out =50ma v in v ss v out v in ={v out(t) +1.0v}v dc +0.5v p-pac ?v out(t) Q1.2v v in =2.25v dc +0.5v p-pac * output capacitor (c l ) corresponding chart v out c l 0.9 1.2v more than equal to 4.7 f 1.3 1.7v more than equal to 2.2 f 1.8 5.5v more than equal to 1.0 f
7/11 XC6231 series operational explanation the XC6231 series controls the output voltage, divided by resistors r1 & r2 which are connected to the v out pin is compared with the internal reference voltage by the error amplifier. the p-channel mosfet connected to the v out pin, is then driven by the subsequent output signal. the out put voltage at the v out pin is controlled & stabilized by negative feedback. the current limit circuit and short protect circuit oper ate in relation to the level of output current. with the XC6231series regulator, a stable output voltage is achievable even if low esr capacitors are used, as a phase compensation circuit is built-in to the regu lator. in order to ensure the effectivene ss of the phase compensation, we suggest t hat an output capacitor (c l ) be connected as close as possible, between the output pin (v out ) and the v ss pin. please use an output capacitor (c l ) with a capacitance, based on the chart below. we also suggest an input capacitor (c in ) of 1 f : this should be connected between v in and v ss in order to stabilize input power source. output capacitor corresponding chart v out c l 0.9 1.2v more than equal to 4.7 f 1.3 1.7v more than equal to 2.2 f 1.8 5.5v more than equal to 1.0 f XC6231series regulator offers a combinati on of current limit and circuit protection by means of a built-in fixed current limite r circuit and a foldback circuit. when the load current reaches t he current limit level, the fix ed current limiter circuit opera tes and output voltage drops. as a result of this drop in output voltage, the foldback circuit operates, the output voltage drops further and output current decreases. when the output pin is shorted, a current of about 50ma flows. notes on use 1 ) please use this ic within the stated absolute maximum ratings . the ic is liable to malfunction should the ratings be exceeded. 2) where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current. please strengthen v in and v ss wiring in particular. 3) please wire the input capacitor (c in ) and the output capacitor (c l ) as close to the ic as possible. should rapid input fluctuation or lo ad fluctuation occur, please increase the capacitor value such as c in or c l to stabilize the operation. 4) torex places an importance on improv ing our products and its reliability. however, by any possibility, we would request user fail-sa fe design and post-aging treatm ent on system or equipment.
8/11 XC6231 series packaging information sot-89-5 (unit: mm) 2.50.1 0.8 min 4.35 max (0.1) 1.50.1 0.8 min 0.3) 0.4) 1.8) 0.4)
9/11 XC6231 series sot-89-5 power dissipation power dissipation data for the sot-89-5 is shown in this page. the value of power dissipation varies with the mount board conditions. please use this data as the reference data taken in the following condition. ambient temperature ( ) power dissipation pd (mw) thermal resistance ( /w) 25 1300 76.92 85 520 1. measurement condition condition: mount on a board ambient: natural convection soldering: lead (pb) free board: dimensions 40mm40mm (1600mm 2 in one side) copper (cu) traces occupy 50% of the board area in top and back faces package heat-sink is tied to the copper traces. material: glass epoxy (fr-4) thickness: 1.6mm through-hole: 5 x 0.8 diameter evaluation board (unit: mm) 2. power dissipation vs. ambient temperature board mount (tjmax=125 ) pd-ta? 0 200 400 600 800 1000 1200 1400 25 45 65 85 105 125 ??ta S?p?pdmw ambient temperature: ta ( ) pd vs. ta power dissipation: pd (mw)
10/11 XC6231 series marking rule sot-89-5 represents product series represents regulator type and output voltage range represents output voltage ? represents production lot number 01 09, 0a 0z, 11 9z, a1 a9, aa az, b1 zz in order. (g, i, j, o, q, w excluded) mark product series 1 XC6231a*****-g mark output voltage (v) product series h 0.9 3.8 XC6231a*****-g k 3.9 5.5 mark output voltage (v) mark output voltage (v) 0 0.9 3.9 f 2.4 5.4 1 1.0 4.0 h 2.5 5.5 2 1.1 4.1 k 2.6 - 3 1.2 4.2 l 2.7 - 4 1.3 4.3 m 2.8 - 5 1.4 4.4 n 2.9 - 6 1.5 4.5 p 3.0 - 7 1.6 4.6 r 3.1 - 8 1.7 4.7 s 3.2 - 8 1.8 4.8 t 3.3 - a 1.9 4.9 u 3.4 - b 2.0 5.0 v 3.5 - c 2.1 5.1 x 3.6 - d 2.2 5.2 y 3.7 - e 2.3 5.3 z 3.8 - 524 123
11/11 XC6231 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 info rmation 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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