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me 1117 v0 5 page 1 of 13 1.0a adjustable voltage high speed ldo regulators me1117 series general description features typical application selection guide the me 1117 series are highly accurate, low noise, ldo voltage regulators th at a re capable of providing an output current that is in excess of 1.0 a with a maximum dropout voltage of 1. 3 v at 1.0 a. this series contains six fixed outp ut voltages of 1. 2 v, 1.8 v, 2.5 v, 3.3 v, and 5.0 v that have no minimum load requirement to maint ain regulation. als o included is an adjustable output version that can be programmed from 1.25 v to 15 v with two external resistors. on chip trimming adjusts the re ference/output voltage to within 2 .0% accuracy. internal protection features consist of ou tput current limiting, safe operating area compensation, and thermal shutdown. the me1117 series can operate with u p to 15 v input. de vices are available in sot223 to252 - 2l . ? consumer and industrial equipment point of regulation ? switching power supply post regulation ? hard drive controllers ? battery chargers typical application circuit ? output current in excess of 1.0a ? dropout voltage 1v@ i out =100ma ? operating voltage range 4.8v 15v me 1117a 33 ? highly accuracy 2 ? adjustable output voltage option ? standby current 3m a tpy. ? high ripple rejection 60 db@1khz me 1117a 33 ? line regulation: 0. 1 typ. ? temperature stability 0.5% ? current limit 1.3a ? thermal shutdown protection 160 ? small packages:sot223 to252 - 2l v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 2 of 13 pin configuration sot223 to252-2l pin assignment me11 17axx pin number pin name functions 1 v ss ground 2 v out output 3 v in power input me11 17 f pin number pin name functions 1 v ad j adjustable output 2 v out output 3 v in power input absolute maximum ratings parameter symbol ratings units input voltage v in 20 v output current i out 1. 3 a output voltage v out vss-0.3 v in +0.3 v power dissipation sot223 p d 750 mw to252- 2l 2000 mw operating temperature range t opr 40 125 storage temperature range t stg 40 150 junction temperature range t j 0 1 5 0 lead temperature sot223 260 4sec to252- 2l 26010 sec thermal resistance junction- to -case sot223 15 c/w to252- 2l 10 c/w thermal resistance junction- to -ambient (no heat sink; no air flow) sot223 136 c/w to252- 2l 92 c/w n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 3 of 13 block diagram electrical characteristics me 1117f (v in = v out +1 .5 v c in= c l =1 0 uf ta=25 o c ,unless otherwise noted ) parameter symbol conditions min. typ. max. units reference voltage v ref v in = v out +1.5v i out =10ma 10mai out 1a v out +1. 5 v v in 15 v 0.9 8 0.98 1.25 1.25 1.0 2 1.02 v maximum output current i outmax v in = v out +1.5v 1000 ma m in imum output current i outm in v in = v out +1.5v 2 ma line regulation ? v ref-line i out =10ma v out +1.5v v in 15 v 0.03 0.2 % load regulation ? v ref-load v in = v out +1.5v ,0mai out 1a 0.2 0.4 % adjustment pin current i adj v in = v out +1.5v 12 30 ua adjust pin current change 10ma i out 1a, 1. 5v v in -v out 15v 0.2 5 ua thermal shutdown junction temperature 150 n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 4 of 13 me 1117a12 (v in = v out +1 .5 v c in = c l =1 0 uf ta=25 o c ,unless otherwise noted ) parameter symbol conditions min. typ. max. units output voltage v out i out =10ma,v in = v out +1 .5 v 10mai out 1a v out + 1.5 v v in 15 v 0.9 8 0.98 1.2 1.2 1.0 2 1.02 v maximum output current i outmax v in = v out +1 .5 v 1000 ma load regulation ? v out-load v in = v out +1 .5 v , 0mai out 1a 2 15 mv dropout voltage (note 1) v dif1 i out =100ma 1.05 1.10 v v dif2 i out =500ma 1.20 1.30 v v dif3 i out =1a 1.30 1.40 v quiescent current i ss v in = v out +1 .5 v 2.8 8 ma line regulation ?v out-line i out =10ma v out + 1.5 v v in 15 v 1 6 mv ripple rejection rate psrr v in = 12v +1vp-pac i out =10ma,1k hz 65 db i out =100ma,1 khz 60 thermal shutdown tj junction temperature 150 me 1117a18 (v in = v out +1 .5 v c in= c l =1 0 uf ta=25 o c ,unless oth erwise noted ) parameter symbol conditions min. typ. max. units output voltage v out i out =10ma,v in = v out +1 .5 v 10mai out 1a v out + 1.5 v v in 15 v 0.9 8 0.98 1.8 1.8 1.0 2 1.02 v maximum output current i outmax v in = v out +1 .5 v 1000 ma load regulation ? v out-load v in = v out +1 .5 v , 0mai out 1a 2 10 mv dropout voltage (note 1) v dif1 i out =100ma 1.05 1.10 v v dif2 i out =500ma 1.20 1.30 v v dif3 i out =1a 1.30 1.40 v quiescent current i ss v in = v out +1 .5 v 2 .2 8 ma line regulation ?v out-line i out =10ma v out + 1.5 v v in 15 v 1 6 mv ripple rejection rate psrr v in = 12v +1vp-pac i out =10ma,1khz 65 db i out =100ma,1khz 60 thermal shutdown junction temperature 150 n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 5 of 13 me 1117a25 (v in = v out +1 .5 v c in= c l =1 0 uf ta=25 o c, unless otherwise noted ) parameter symbol conditions min. typ. max. units output voltage v out i out =10ma,v in = v out +1 .5 v 10mai out 1a v out + 1.5 v v in 15 v 0.9 8 0.98 2.5 2.5 1.0 2 1.02 v maximum output current i outmax v in = v out +1 .5 v 1000 ma load regulation ? v out-load v in =v out +1 .5 v , 0mai out 1 000ma 1 10 mv dropout voltage (note 1) v dif1 i out =100ma 1.05 1.10 v v dif2 i out =800ma 1.20 1.30 v v dif3 i out =1a 1.30 1.40 v quiescent current i ss v in = v out +1 .5 v 2 .2 5 ma line regulation ?v out-line i out =10ma v out + 1.5 v v in 15 v 2 6 mv rip ple rejection rate psrr v in = 12v +1vp-pac i out =10ma,1khz 65 db i out =100ma,1khz 60 thermal shutdown junction temperature 150 me 1117a33 (v in = v out +1 .5 v c in= c l =1 0 uf ta=25 o c, unless otherwise noted ) parameter symbol conditions min. typ. max. units output voltage v out i out =10ma,v in = v out +1 .5 v 10mai out 1a v out + 1.5 v v in 15 v 0.9 8 0.98 3.3 3.3 1.0 2 1.02 v maximum output current i outmax v in = v out +1 .5 v 1000 ma load regulation ? v out-load v in = v out +1 .5 v , 0mai out 1a 2 10 mv dropout voltage (note 1) v dif1 i out =100ma 1.05 1.10 v v dif2 i out =800ma 1.20 1. 30 v v dif3 i out =1a 1.30 1. 40 v quiescent current i ss v in = v out +1 .5 v 3 10 ma line regulation ?v out-line i out =10ma v out + 1.5 v v in 15 v 2 6 mv ripple rejection rate psrr v in = 12 v +1vp-pac i out =10ma,1khz 65 db i out =1 00ma,1khz 60 thermal shutdown junction temperature 150 n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 6 of 13 me 1117a50 (v in = v out +1 .5 v c in= c l =1 0 uf ta=25 o c, unless otherwise noted ) parameter symbol conditions min. typ. max. units output voltage v out i ou t =10ma,v in = v out +1 .5 v 10mai out 1 a v out + 1.5 v v in 15 v 0.9 8 0.98 5.0 5.0 1.0 2 1.02 v maximum output current i outmax v in = v out +1 .5 v 1000 ma load regulation ? v out-load v in = v out +1 .5 v , 0mai out 1a 8 15 mv dropout voltage (note 1) v dif1 i out =100ma 1.05 1.10 v v dif2 i out =800ma 1.20 1.30 v v dif3 i out =1a 1.30 1.40 v quiescent current i ss v in = v out +1 .5 v 4.7 10 ma line regulation ?v out-line i out =10ma v out +1.5v v in 15 v 2 10 mv ripple rejection rate psrr v in = 12v +1vp-pac i out =10ma,1khz 65 db i out =1 00ma,1khz 60 thermal shutdown junction temperature 150 note 1 .v dif v in1 C v out (e) v in1 the input voltage when v out (e) appears as input voltage is gradually decreased. v out (e)=a voltage equal to 9 9 % of the output voltage w henever an amply stabilized iout and {v out (t)+1. 5 v} is input. n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 7 of 13 type characteristics 1 output voltage vs. output current 2 output voltage vs . i utput voltage v in =v out +1 .5v v out = 3.3 v , i out = 1 0ma me1117a33 me1117a33 o utput vo ltage vs.output current 2.85 2.95 3.05 3.15 3.25 3.35 3.45 0 200 400 600 800 1000 output current (ma) o utput vo ltage(v) t=75 t=25 o utput vo ltage vs.input voltage(vout=3.3v,iout=10ma) 3.150 3.200 3.250 3.300 3.350 2 4 6 8 10 12 14 16 18 20 input voltage(v) o utput vo ltage(v) t=25 t=75 3 droput voltage vs. out put current 4 load regulation vs.temp(iout from 10ma to 1a) me1117a33 me1117a33 d ropo u t voltage vs.output current 0 0.3 0.6 0.9 1.2 1.5 1.8 100 200 300 400 500 600 700 800 900 1000 output current(m a) d ropo u t voltage(v) t=25 t=75 l oad r egulation vs.tem p(iout from 10m a to 1a) -1.00 -0.50 0.00 0.50 1.00 -40 -25 0 25 50 75 100 125 tem perature( ) v out/v out*100% 5 output voltage vs. temperature 6 output voltage change vs. temperature me1117a33 me1117a33 o utput v oltage (vout=3.3v)vs. temperature 0 .5 1.0 1 . 5 2.0 2.5 3.0 3.5 4.0 - 40 -2 5 0 25 50 75 100 125 150 te mpera t ure( ) o utput v oltage(v) o utput vo ltage vs.temperature -2 .00 -1. 5 0 -1.00 -0.50 0.00 0.50 1.00 1.50 -4 0 -25 0 25 50 75 100 125 150 t empe r ature( ) vo ut/vou t* 100% n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 8 of 13 7 adj pin current vs.temperature 8 ripple rejection vs. frequency me1117 f me1117a33 a dj pi n current vs.temperature 0 6 12 18 24 -40 -25 0 25 50 75 100 125 150 temperature( ) a dj pi n current(ua) r ipple rejection vs. frequency 20 30 40 50 60 70 10 100 1000 10000 100000 frequency(hz) r ipple rejection (db) 9 line transient response 10 load transient response me 1 117a 33 me 1 117a 33 ch1 output voltage ch3 input voltag e ch1 out put voltage ch2 load current v in = 8 v 12v ,i out =0ma, ta = 25 c v in =4.8v, i out =0ma 240ma, ta = 25 c n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 9 of 13 applications information ? introduction the me 1117 features a significant reduction in dropout voltage along with enhanced output voltage accuracy and temperature stability when compared to older industry standard three?terminal adjustable regulators. ? output voltage the typical application circuit for adjustable output regulator is shown in following fi gure. they develop and maintain the nominal 1.25 v reference voltage between the output and adjust pins. the reference voltage is programmed to a constant current source by resistor r1, and this current flows through r2 to ground to set the output voltage. the programmed current level is usually selected to be greater than the specified 3 .0 ma minimum that is required for regulation. since the adjust pin current, i adj , is significantly lower and constant with respect to the programmed load current, it generates a small output voltage error that can usually be ignored. ? external capacitors input bypass capacitor c in may be required for regulator stability. this capacitor will reduce the circuits sensitivity when powered from a complex source. a 10uf ceramic or tantalum capacitor should be adequate for most applications. frequency compensation for the regulator is provided by capacitor c out and its use is mandatory to ensure output stability. a minimum capacitance value of 4.7uf with an equivalent series resistance (esr) that is within the limits of 0.25 ohm to 2.2 ohm is required. higher values of output capacitance can be used to enhance loop stability and transient response with the additional benefit of reducing output noise. the output ripple will increase linearly for fixed and adjustable devices as the ratio of output voltage to the reference voltage increases. ? protection diodes the me1117 has two internal low impedance diode paths that normally do not require protection when used in the typical regulator applications. the first path connects between v out and v in , and it can withstand a peak surge current of about 15 a. only when v in is shorted to ground and c out is greater than 10 0 uf, it becomes possible for device damage to occur. under these condi tions, diode d1 is required to protect the device. the s econd path connects between c adj and v out , and it can w ithstand a peak surge current of about 150 ma. protection diode d2 is required if the output is shorted to gr ound and c adj is greater than 10 uf . ? thermal considerations this series contains an internal thermal limiting circuit that is designed to protect the regulator in the event that the maximum junction temperature is exceeded. when activated, typically at 175c, the regulator output switches off and then back on as the die cools. n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 10 of 13 other application circuit 1 constant current regulator 2 slow turn?on regulator 3 regulator with shutdown 4 digitally controlled regulator 5 battery backed?up power su pply 6 adjusting output of fixed voltage regulators resistor r2 sets the maximum output voltage. each transistor reduces the output voltage when turned on. the 50 ohm resistor that is in series with the ground pin of the upper regulator level shifts its output 300 mv higher than the lower regulator. this keeps the lower regulator off until the input source is removed. n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 11 of 13 packaging information sot223 n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 12 of 13 to252 - 2l n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com
me 1117 v0 5 page 13 of 13 ? the information described herein is subject to change without notice. ? nanjing micro one electronics inc is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. the application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. ? use of the information described herein for other purposes and/or reproduction or copying without the express permission of nanjing micro one electronics inc is strictly prohibited. ? the products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of nanjing micro one electronics inc. ? although nanjing micro one electronics inc exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. the user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. n~n?t?m?w3^v?mw`r?y?b?g ?pqls? tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com v?mw`r?y?b? www.gofotech.com

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