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SGM2021 low power, low dropout, linear regulators general description the SGM2021 series low-power, low-noise, low-dropout, cmos linear voltage regulators operate from a 2.5v to 5.5v input voltage. they are the perfect choice for low voltage, low power applications. a low ground current makes this part attractive for battery operated power systems. the SGM2021 series also offer low dropout voltage to prolong battery life in portable electronics. the SGM2021 features include output current limit and thermal shutdown protection. the SGM2021 is available in green sot-23-3 package. it operates over an ambient temperature range of -40 to +85 . applications cellular telephones cordless telephones pcmcia cards modems mp3 player hand-held instruments palmtop computers electronic planners portable/battery-powered equipment features ? low output noise ? low dropout voltage ? maximum output current: 300ma ? thermal-overload protection ? output current limit ? available fixed output voltages: 0.9v, 1.2v, 1.3v, 1.5v, 1.8v, 2.1v, 2.5v, 2.6v, 2.7v, 2.8v, 2.85v, 2.9v, 3.0v, 3.1v, 3.2v, 3.3v, 3.6v, 4.2v and 5.0v ? -40 to +85 operating temperature range ? available in green sot-23-3 package product name structure SGM2021-xxx x xx g / tr operating temperature range output voltage package type green product tape and reel n3 sot-23-3 y -40 to +85 0.9 0.9v 1.2 1.2v 1.3 1.3v 1.5 1.5v . . . . . . 3.6 3.6v 4.2 4.2v 5.0 5.0v rev. b sg micro corp www.sg-micro.com
low power, low dropout, linear regulators 2 SGM2021 sg micro corp www.sg-micro.com package/ordering information model v out (v) pin- package ordering number package marking package option SGM2021-0.9 0.9v sot-23-3 SGM2021-0.9yn3g/tr yl09 tape and reel, 3000 SGM2021-1.2 1.2v sot-23-3 SGM2021-1.2yn3g/tr yl12 tape and reel, 3000 SGM2021-1.3 1.3v sot-23-3 SGM2021-1.3yn3g/tr yl13 tape and reel, 3000 SGM2021-1.5 1.5v sot-23-3 SGM2021-1.5yn3g/tr yl15 tape and reel, 3000 SGM2021-1.8 1.8v sot-23-3 SGM2021-1.8yn3g/tr yl18 tape and reel, 3000 SGM2021-2.1 2.1v sot-23-3 SGM2021-2.1yn3g/tr yl21 tape and reel, 3000 SGM2021-2.5 2.5v sot-23-3 SGM2021-2.5yn3g/tr yl25 tape and reel, 3000 SGM2021-2.6 2.6v sot-23-3 SGM2021-2.6yn3g/tr yl26 tape and reel, 3000 SGM2021-2.7 2.7v sot-23-3 SGM2021-2.7yn3g/tr yl27 tape and reel, 3000 SGM2021-2.8 2.8v sot-23-3 SGM2021-2.8yn3g/tr yl28 tape and reel, 3000 SGM2021-2.85 2.85v sot-23-3 SGM2021-2.85yn3g/tr yl2j tape and reel, 3000 SGM2021-2.9 2.9v sot-23-3 SGM2021-2.9yn3g/tr yl29 tape and reel, 3000 SGM2021-3.0 3.0v sot-23-3 SGM2021-3.0yn3g/tr yl30 tape and reel, 3000 SGM2021-3.1 3.1v sot-23-3 SGM2021-3.1yn3g/tr yl31 tape and reel, 3000 SGM2021-3.2 3.2v sot-23-3 SGM2021-3.2yn3g/tr yl32 tape and reel, 3000 SGM2021-3.3 3.3v sot-23-3 SGM2021-3.3yn3g/tr yl33 tape and reel, 3000 SGM2021-3.6 3.6v sot-23-3 SGM2021-3.6yn3g/tr yl36 tape and reel, 3000 SGM2021-4.2 4.2v sot-23-3 SGM2021-4.2yn3g/tr yl42 tape and reel, 3000 SGM2021-5.0 5.0v sot-23-3 SGM2021-5.0yn3g/tr yl50 tape and reel, 3000
low power, low dropout, linear regulators 3 SGM2021 sg micro corp www.sg-micro.com absolute maximum ratings in to gnd................................................................. -0.3v to 6v output short-circuit duration............................................infinite out to gnd............................................... -0.3v to (v in + 0.3v) power dissipation, p d @ t a = 25 sot-23-3 ............................................................................0.4w package thermal resistance sot-23-3, ja ............................................................... 250 /w operating temperature range ............. .............. -40 to +85 junction temperature....................................................... 150 storage temperature range..............................-65 to +150 lead temperature (soldering, 10s).................................. 260 esd susceptibility hbm............... .................. ................. .................. ..............4000v mm......................................................................................400v note: stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the s pecifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. typical application circuit input 2.5v to 5.5v in out gnd c in 1 f c out 1 f SGM2021 output caution this integrated circuit can be damaged by esd if you don?t pay attention to esd protection. sgmicro recommends that all integrated circuits be handled with appropriate precautions. failure to observe proper handling and installation procedures can cause damage. esd damage can range from subtle performance degradation to complete device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. sgmicro reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. please contact sgmicro sales office to get the latest datasheet. pin configuration (top view) 2 3 1 in sot-23-3 gnd out ylxx note: (1) the location of pin 1 on the ylxx is determined by orienting the package marking as shown. (2) ?xx? is the output voltage code. (for example: when the output voltage is 1.8v, it is expressed as 18.) pin description pin name function 3 in regulator input. supply voltage can range from 2.5v to 5.5v. bypass with a 1 f capacitor to gnd. 1 gnd ground. 2 out regulator output.
low power, low dropout, linear regulators 4 SGM2021 sg micro corp www.sg-micro.com electrical characteristics (v in = v out (nominal) + 0.5v or 2.5v, whichever is greater, t a = +25c, unless otherwise noted.) parameter symbol conditions min typ max units input voltage v in 2.5 5.5 v output voltage accuracy i out = 0.1ma, t a = +25 -2.5 2.5 % maximum output current 300 ma current limit i lim 310 500 ma ground pin current i q no load 120 220 a i out = 1ma 0.9 dropout voltage (1) i out = 300ma 270 400 mv line regulation v lnr v in = 2.5v or (v out + 0.5v) to 5.5v, i out = 1ma 0.02 0.05 %/v i out = 0.1ma to 300ma, c out = 1f, v out > 2v 0.002 0.005 load regulation v ldr i out = 0.1ma to 300ma, c out = 1f, v out 2v 0.004 0.008 %/ma output voltage noise e n f = 10hz to 100khz, c out = 10f 140 v rms f = 217hz 62 db power supply rejection rate psrr i load = 50ma, c out = 1 f, v in = v out + 1v f = 100hz 69 db thermal protection thermal shutdown temperature t shdn 150 thermal shutdown hysteresis t shdn 15 note: 1. the dropout voltage is defined as v in - v out , when v out is 100mv below the value of v out for v in = v out + 0.5v (only applicable for v out = +2.5v to +5.0v).
low power, low dropout, linear regulators 5 SGM2021 sg micro corp www.sg-micro.com typical performance characteristics v in = v out (nominal) + 0.5v or 2.5v (whichever is greater), c in = 1 f, c out = 1 f, t a = +25 , unless otherwise noted. dropout voltage vs. load current 0 50 100 150 200 250 300 350 400 0 50 100 150 200 250 300 load current (ma) dropout voltage (mv) SGM2021-2.8 t a = -40 t a = +85 t a = +25
low power, low dropout, linear regulators 6 SGM2021 sg micro corp www.sg-micro.com typical operating characteristics v in = v out (nominal) + 0.5v or 2.5v (whichever is greater), c in = 1 f, c out = 1 f, t a = +25 , unless otherwise noted. output voltage vs. load current 2.5 2.6 2.7 2.8 2.9 3 0 50 100 150 200 250 300 load current (ma) output voltage (v) SGM2021-2.8 ground pin current vs. load current 60 80 100 120 140 160 180 200 0 50 100 150 200 250 300 load current (ma) ground pin current (a) SGM2021-2.8 ground pin current vs. input voltage 0 20 40 60 80 100 120 00.511.522.533.544.555.5 input voltage (v) ground pin current (a) SGM2021-2.8 no load output voltage vs. load current 1.5 1.6 1.7 1.8 1.9 2 0 50 100 150 200 250 300 load current (ma) output voltage (v) SGM2021-1.8 ground pin current vs. load current 60 80 100 120 140 160 180 200 0 50 100 150 200 250 300 load current (ma) ground pin current (a) SGM2021-1.8 ground pin current vs. input voltage 0 20 40 60 80 100 120 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 input voltage (v) ground pin current (a) SGM2021-1.8 no load
low power, low dropout, linear regulators 7 SGM2021 sg micro corp www.sg-micro.com typical operating characteristics v in = v out (nominal) + 0.5v or 2.5v (whichever is greater), c in = 1 f, c out = 1 f, t a = +25 , unless otherwise noted. output voltage vs. input voltage 0 0.8 1.6 2.4 3.2 4 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 input voltage (v) output voltage (v) SGM2021-2.8 no load ground pin current vs. temperature 40 60 80 100 120 140 -40 -15 10 35 60 85 temperature ( ) ground pin current ( a) no load SGM2021-2.8 current limit vs. temperature 200 300 400 500 600 700 800 -40 -15 10 35 60 85 temperature ( ) current limit (ma) SGM2021-2.8 output voltage vs. input voltage 0 0.4 0.8 1.2 1.6 2 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 input voltage (v) output voltage (v) SGM2021-1.8 no load ground pin current vs. temperature 40 60 80 100 120 140 -40 -15 10 35 60 85 temperature ( ) ground pin current ( a) no load SGM2021-1.8 current limit vs. temperature 200 300 400 500 600 700 800 -40 -15 10 35 60 85 temperature ( ) current limit (ma) SGM2021-1.8
low power, low dropout, linear regulators 8 SGM2021 sg micro corp www.sg-micro.com typical operating characteristics v in = v out (nominal) + 0.5v or 2.5v (whichever is greater), c in = 1 f, c out = 1 f, t a = +25 , unless otherwise noted. output voltage accuracy vs. temperature -0.6 -0.4 -0.2 0 0.2 0.4 0.6 -40 -15 10 35 60 85 temperature ( ) output voltage accuracy (%) SGM2021-2.8 power supply rejection ratio vs. frequency 0 20 40 60 80 100 0.01 0.1 1 10 100 1000 frequency (khz) psrr (db) i load = 50ma v in = 3.8v to 3.9v v out = 2.8v c out = 1 f c out = 10 f output voltage accuracy vs. temperature -0.6 -0.4 -0.2 0 0.2 0.4 0.6 -40 -15 10 35 60 85 temperature ( ) output voltage accuracy (%) SGM2021-1.8
low power, low dropout, linear regulators 9 SGM2021 sg micro corp www.sg-micro.com application note when ldo is used in handheld products, attention must be paid to voltage spikes which could damage SGM2021. in such applications, voltage spikes will be generated at charger interface and v bus pin of usb interface when charger adapters and usb equipments are hot-plugged. besides this, handheld products will be tested on the production line without battery. test engineer will apply power from the connecto r pin which connects with positive pole of the battery. when external power supply is turned on suddenly, the volt age spikes will be generated at the battery connector. the voltage spikes will be very high, and it always exceeds the absolute maximum input voltage (6.0v) of ldo. in order to get robust design, design engineer needs to clear up this voltage spike. zener diode is a cheap and effective solution to eliminate such voltage spike. for example, bzm55b5v6 is a 5.6v small package zener diode which can be used to remove voltage spikes in cell phone designs. the schematic is shown below. ? SGM2021 4.7f out 1 vcc input gnd in v out c 2 c 1 1f bzm55b5v6 2 3
low power, low dropout, linear regulators 10 SGM2021 sg micro corp www.sg-micro.com package outline dimensions sot-23-3 e e1 e1 e b d a a2 a1 c l 0.2 0.95 0.69 0.99 2.59 1.90 recommended land pattern (unit: mm) dimensions in millimeters dimensions in inches symbol min max min max a 1.050 1.250 0.041 0.049 a1 0.000 0.100 0.000 0.004 a2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 d 2.820 3.020 0.111 0.119 e 1.500 1.700 0.059 0.067 e1 2.650 2.950 0.104 0.116 e 0.950 bsc 0.037 bsc e1 1.900 bsc 0.075 bsc l 0.300 0.600 0.012 0.024 0 8 0 8
low power, low dropout, linear regulators 11 SGM2021 sg micro corp www.sg-micro.com tape and reel information note: the picture is only for reference. please make the object as the standard. key parameter list of tape and reel package type reel diameter reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p0 (mm) p1 (mm) p2 (mm) w (mm) pin1 quadrant sot-23-3 7 9.0 3.2 3.3 1.3 4.0 4.0 2.0 8.0 q3 reel width (w1) reel diameter reel dimensions tape dimensions direction of feed p2 p0 w p1 a0 k0 b0 q1 q2 q4 q3 q3 q4 q2 q1 q3 q4 q2 q1
low power, low dropout, linear regulators 12 SGM2021 sg micro corp www.sg-micro.com carton box dimensions note: the picture is only for reference. please make the object as the standard. key parameter list of carton box reel type length (mm) width (mm) height (mm) pizza/carton 7 (option) 368 227 224 8 7 442 410 224 18

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