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1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 1 - htc features z output current up to 1 a z low dropout voltage (1.2v at 1a output current) z three terminal adjustable(adj) or fixed 1.2v, 1.5v, 1.8v, 2.5v, 2.85v, 3.3v, 5.0v z line regulation typically at 0.1% max. z load regulation typically at 0.2% max. z internal current and terminal protection z maximum input voltage 20v z surface mount package sot-223, to-252, sot-89 z 100% thermal limit burn-in z moisture sensitivity level 3 application z active scsi terminators z portable/ plan top/ notebook computers z high efficiency linear regulators z smps post regulators z mother b/d clock supplies z disk drives z battery chargers sot-223 pkg to-252 pkg sot-89 pkg ordering information device package LM1117s-adj sot-223 3l LM1117s-x.x LM1117gs-adj LM1117gs-x.x LM1117rs-adj to-252 3l LM1117rs-x.x LM1117grs-adj LM1117grs-x.x LM1117f-adj sot-89 3l LM1117f-x.x LM1117gf-adj LM1117gf-x.x x.x = output voltage = 1.2v, 1.5v, 1.8v, 2.5v, 2.85v, 3.3v, 5.0v descripsion the LM1117 is a low power positive-voltage regulator designe d to meet 1a output current and comply with scsi-ii specifications with a fixed output voltage of 2.85v. this device is an excellent choice for use in battery-powered applications, as active terminators for the scsi bus, and portable computers. the LM1117 features very low quiescent current and very low dropout voltage of 1v at a full load and lower as output current decreases. LM1117 is available as an adjustable or fixed 1.2v, 1. 5v, 1.8v, 2.5v, 2.85, 3.3v, and 5.0v output voltages. the LM1117 is offered in a 3-pin surface mount package so t-223, to-252 & sot-89. the output capacitor of 10 ? o r larger is needed for output stability of LM1117 as re quired by most of the ot her regulator circuits. absolute maximum ratings (t a = 25 , unless otherwise specified) characteristic symbol min. max. unit dc input voltage v in - 20 v lead temperature (soldering, 5 seconds) t sol - 260 operating junction temperature range t opr -40 125 storage temperature range t stg -65 150
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 2 - htc ordering information v out package order no. package marking supplied as status adj sot-223 LM1117s-adj 1117c adj reel active sot-223 LM1117gs-adj 1117gc adj reel contact us to-252 LM1117rs-adj LM1117c adj reel active to-252 LM1117grs-adj LM1117gc adj reel contact us sot-89 LM1117f-adj 1117c adj reel active sot-89 LM1117gf-adj 1117gc adj reel active 1.2v sot-223 LM1117s-1.2v 1117c 1.2 reel active sot-223 LM1117gs-1.2v 1117gc 1.2 reel contact us to-252 LM1117rs-1.2v LM1117c 1.2 reel active to-252 LM1117grs-1.2v LM1117gc 1.2 reel contact us sot-89 LM1117f-1.2v 1117c 1.2 reel active sot-89 LM1117gf-1.2v 1117gc 1.2 reel active 1.5v sot-223 LM1117s-1.5v 1117c 1.5 reel active sot-223 LM1117gs-1.5v 1117gc 1.5 reel contact us to-252 LM1117rs-1.5v LM1117c 1.5 reel active to-252 LM1117grs-1.5v LM1117gc 1.5 reel contact us sot-89 LM1117f-1.5v 1117c 1.5 reel active sot-89 LM1117gf-1.5v 1117gc 1.5 reel active 1.8v sot-223 LM1117s-1.8v 1117c 1.8 reel active sot-223 LM1117gs-1.8v 1117gc 1.8 reel contact us to-252 LM1117rs-1.8v LM1117c 1.8 reel active to-252 LM1117grs-1.8v LM1117gc 1.8 reel contact us sot-89 LM1117f-1.8v 1117c 1.8 reel active sot-89 LM1117gf-1.8v 1117gc 1.8 reel active 2.5v sot-223 LM1117s-2.5v 1117c 2.5 reel active sot-223 LM1117gs-2.5v 1117gc 2.5 reel contact us to-252 LM1117rs-2.5v LM1117c 2.5 reel active to-252 LM1117grs-2.5v LM1117gc 2.5 reel contact us sot-89 LM1117f-2.5v 1117c 2.5 reel active sot-89 LM1117gf-2.5v 1117gc 2.5 reel active 2.85v sot-223 LM1117s-2.85v 1117c 2.85 reel active sot-223 LM1117gs-2.85v 1117gc 2.85 reel contact us to-252 LM1117rs-2.85v LM1117c 2.85 reel active to-252 LM1117grs-2.85v LM1117gc 2.85 reel contact us sot-89 LM1117f-2.85v 1117c 2.85 reel active sot-89 LM1117gf-2.85v 1117gc 2.85 reel active
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 3 - htc ordering information (continued) vout package order no. package marking supplied as status 3.3v sot-223 LM1117s-3.3v 1117c 3.3 reel active sot-223 LM1117gs-3.3v 1117gc 3.3 reel contact us to-252 LM1117rs-3.3v LM1117c 3.3 reel active to-252 LM1117grs-3.3v LM1117gc 3.3 reel contact us sot-89 LM1117f-3.3v 1117c 3.3 reel active sot-89 LM1117gf-3.3v 1117gc 3.3 reel active 5.0v sot-223 LM1117s-5.0v 1117c 5.0 reel active sot-223 LM1117gs-5.0v 1117gc 5.0 reel contact us to-252 LM1117rs-5.0v LM1117c 5.0 reel active to-252 LM1117grs-5.0v LM1117gc 5.0 reel contact us sot-89 LM1117f-5.0v 1117c 5.0 reel active sot-89 LM1117gf-5.0v 1117gc 5.0 reel active
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 4 - htc pin configuration sot-223 to-252 sot-89 pin description pin no. sot-223 / to-252 / sot-89 name function 1 adj/gnd adjustable / ground 2 v out output voltage 3 vi n input voltage
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 5 - htc electrical characteristics for adj output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v ref reference voltage v in =5v, i o =10ma 1.238 1.250 1.262 v v ref reference voltage i o = 10ma to 1a, v in - v ref = 1.5v to 13.75v (t j = 0 ~ 125 ) 1.219 1.281 v v line line regulation i o = 10ma , v in - v ref = 1.5v to 12v 0.1 0.2 % v load load regulation i o = 10ma to 1a, v in - v ref = 2 v 0.2 0.4 % v in operating input voltage 12 v i adj adjustment pin current v in - v ref = 1.5v to 12v, i o = 100ma 50 120 ua i adj adjustment pin current change v in - v ref = 1.5v to 12v, i o = 100ma to 1a 0.5 5 ua i o(min) minimum load current v in =5v, v ref =0v 5 10 ma i o current limit v in - v ref = 5v 1000 1250 1600 ma e n output noise(%v o ) b = 10hz to 10khz, t j = 25 0.003 % svr supply voltage rejection i o = 1a, f = 120hz, v in - v ref = 3v, v ripple = 1v pp 60 75 db for 1.2v output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v o output voltage v in = 2.7v, i o = 10ma 1.176 1.200 1.224 v v o output voltage v in = 2.7v to 12v, i o = 0ma to 1a (t j = 0 ~ 125 ) 1.152 1.248 v v line line regulation i o = 0ma , v in = 2.7v to 12v 0.1 0.2 % v load load regulation i o = 10ma to 1a, v in = 3.2v 0.2 0.4 % v in operating input voltage 12 v i d quiescent current v in - v o = 5v 5 10 ? i o current limit v in - v o = 5v 1000 1250 1600 ? e n output noise(%v o ) b = 10hz to 10khz, t j = 25 0.003 % svr supply voltage rejection i o = 1a, f = 120hz, v in - v o = 1.5v, v ripple = 1v pp 60 75 db
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 6 - htc for 1.5v output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v o output voltage v in = 3.0v , i o = 10ma 1.485 1.5 1.515 v v o output voltage v in = 3.0v to 12v, i o = 0ma to 1a (t j = 0 ~ 125 ) 1.470 1.530 v v line line regulation i o = 0ma , v in = 3.0v to 12v 0.1 0.2 % v load load regulation i o = 0ma to 1a, v in = 3.5 v 0.2 0.4 % v in operating input voltage i o = 100ma 12 v i d quiescent current v in - v o = 5v 5 10 ma i o current limit v in - v o = 5v 1000 1250 1600 ma e n output noise(%v o ) b = 10hz to 10khz, t j = 25 100 uv svr supply voltage rejection i o = 1a, f = 120hz, v in - v o = 3v, v ripple = 1v pp 60 75 db for 1.8v output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v o output voltage v in = 3.3v, i o = 10ma 1.782 1.8 1.818 v v o output voltage v in = 3.3v to 12v, i o = 0ma to 1a (t j = 0 ~ 125 ) 1.764 1.836 v v line line regulation i o = 0ma , v in = 3.3v to 12v 0.1 0.2 % v load load regulation i o = 0ma to 1a, v in = 3.8 v 0.2 0.4 % v in operating input voltage i o = 100ma 12 v i d quiescent current v in - v o = 5v 5 10 ma i o current limit v in - v o = 5v 1000 1250 1600 ma e n output noise(%v o ) b = 10hz to 10khz, t j = 25 100 uv svr supply voltage rejection i o = 1a, f = 120hz, v in - v o = 3v, v ripple = 1v pp 60 75 db
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 7 - htc for 2.5v output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v o output voltage v in = 4.0v, i o = 10ma 2.475 2.5 2.525 v v o output voltage v in = 4.0v to 12v, i o = 0ma to 1a (t j = 0 ~ 125 ) 2.450 2.550 v v line line regulation i o = 0ma , v in = 4.0v to 12v 0.1 0.2 % v load load regulation i o = 0ma to 1a, v in = 4.5 v 0.2 0.4 % v in operating input voltage i o = 100ma 12 v i d quiescent current v in - v o = 5v 5 10 ma i o current limit v in - v o = 5v 1000 1250 1600 ma e n output noise(%v o ) b = 10hz to 10khz, t j = 25 100 uv svr supply voltage rejection i o = 1a, f = 120hz, v in - v o = 3v, v ripple = 1v pp 60 75 db for 2.85v output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v o output voltage v in = 4.4v, i o = 10ma 2.821 2.85 2.878 v v o output voltage v in = 4.4v to 12v, i o = 0ma to 1a (t j = 0 ~ 125 ) 2.793 2.907 v v line line regulation i o = 0ma , v in = 4.4 to 12v 0.1 0.2 % v load load regulation i o = 0ma to 1a, v in = 4.85 v 0.2 0.4 % v in operating input voltage i o = 100ma 12 v i d quiescent current v in - v o = 5v 5 10 ma i o current limit v in - v o = 5v 1000 1250 1600 ma e n output noise(%v o ) b = 10hz to 10khz, t j = 25 100 uv svr supply voltage rejection i o = 1a, f = 120hz, v in - v o = 3v, v ripple = 1v pp 60 75 db
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 8 - htc for 3.3v output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v o output voltage v in = 4.8v, i o = 10ma 3.267 3.3 3.333 v v o output voltage v in = 4.8v to 12v, i o = 0ma to 1a (t j = 0 ~ 125 ) 3.234 3.366 v v line line regulation i o = 0ma , v in = 4.8v to 12v 0.1 0.2 % v load load regulation i o = 0ma to 1a, v in = 5.3 v 0.2 0.4 % v in operating input voltage i o = 100ma 12 v i d quiescent current v in - v o = 5v 5 10 ma i o current limit v in - v o = 5v 1000 1250 1600 ma e n output noise(%v o ) b = 10hz to 10khz, t j = 25 100 uv svr supply voltage rejection i o = 1a, f = 120hz, v in - v o = 3v, v ripple = 1v pp 60 75 db for 5.0v output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v o output voltage v in = 6.5v, i o = 10ma 4.950 5.0 5.050 v v o output voltage v in = 6.5v to 15v, i o = 0ma to 1a (t j = 0 ~ 125 ) 4.900 5.100 v v line line regulation i o = 0ma , v in = 6.5v to 15v 0.1 0.2 % v load load regulation i o = 0ma to 1a, v in = 7.0 v 0.2 0.4 % v in operating input voltage i o = 100ma 12 v i d quiescent current v in - v o = 5v 5 10 ma i o current limit v in - v o = 5v 1000 1250 1600 ma e n output noise(%v o ) b = 10hz to 10khz, t j = 25 100 uv svr supply voltage rejection i o = 1a, f = 120hz, v in - v o = 3v, v ripple = 1v pp 60 75 db
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 9 - htc for all output voltage (t a =25 , c o = 10uf unless otherwise specified) symbol parameters condition min. typ. max. unit v d dropout voltage i o = 100ma 1.0 1.1 v i o = 500ma 1.1 1.2 v i o = 1a 1.2 1.3 v temperature stability 0.5 % long term stability 1000 hrs, t j = 125 0.3 % thermal regulation t a = 25 30ms pulse 0.003 %/w typical application circuit fig.1 1a current output fig.2 typical adjustable regulator
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 10 - htc fig.3 negative supply fig.4 active terminator for scsi-2bus fig.5 voltage regulator with reference fig.6 battery backed-up regulated supply
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 11 - htc typical operating characteristics i q , quiescent current change (%) fig.7 output voltage change vs temperature fig.8 dropout voltage vs output current fig.9 output short circuit current vs differential v o lta g e fig.10 output short circuit current vs temperature fig.11 adj pin current vs temperature fig.12 quiescent current change vs temperature
1a l.d.o voltage regulator LM1117 mar. 2013 rev. 1.22 - 12 - htc application information maximum output current capability the LM1117 can deliver a continuous curr ent of 1a over the full operating junction temperature range. however, the output current is limited by the re striction of power dissipation which di ffers from packages. a heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. with respect to the applied package, the maximum output current of 1a may be still undeliverable due to the restriction of the power dissipation of LM1117. under all possible conditions, the junction temperature must be within the range specified under operating conditions. the temperatures over the device are given by: t c = t a + p d x ca / t j = t c + p d x jc / t j = t a + p d x ja where t j is the junction temperature, t c is the case temperature, t a is the ambient temperature, p d is the total power dissipation of the device, ca is the thermal resistance of case-to-ambient, jc is the thermal resistance of junction-to-case, and ja is the thermal resistance of junction to ambient. the total power dissipation of the device is given by: p d = p in ? p out = (v in x i in )?(v out x i out ) = (v in x (i out +i gnd )) ? (v out x i out ) = (v in - v out ) x i out + v in x i gnd where i gnd is the operating ground current of t he device which is specified at the electrical characteristics. the maximum allowable temperature rise (t rmax ) depends on the maximum ambient temperature (t amax ) of the application, and the maximum allowable junction temperature (t jmax ): t rmax = t jmax ? t amax the maximum allowable value for junction-to-ambient thermal resistance, ja , can be calculated using the formula: ja = t rmax / p d = (t jmax ? t amax ) / p d LM1117 is available in sot223, to252 and sot89 package s. the thermal resistance depends on amount of copper area or heat sink, and on air flow. if the maximum allowable value of ja calculated above is over 137c/w for sot-223 package, over 105 c/w for to252 package, over 315 c/w for sot-89 package, no heat sink is needed since the package c an dissipate enough heat to satisfy thes e requirements. if the value for allowable ja falls near or below these limits, a heat sink or proper area of copper plane is required. in summary, the absolute maximum ratings of thermal resistances are as follow: absolute maximum ratings of thermal resistance characteristic symbol rating unit thermal resistance junction-to-ambient / sot-223 ja-sot-223 137 c/w thermal resistance junction-to-ambient / to-252 ja-to-252 105 c/w thermal resistance junction-to-ambient / sot-89 ja-sot-89 315 c/w no heat sink / no air flow / no adjacent heat source / 0.066 inch 2 copper area. (t a =25c)

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