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1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 1 - htc features ? qualified to aec-q100 standard ? output current up to 1a ? low dropout voltage (1.2v at 1a output current) ? three terminal adjustable(adj) or fixed 1.2v, 1.5v, 1.8v, 2.5v, 2.85v, 3.3v, 5.0v ? line regulation typically at 0.1% max. ? load regulation typically at 0.2% max. ? internal current and terminal protection ? maximum input voltage 15v ? surface mount package sot-223 ? 100% thermal limit burn-in ? moisture sensitivity level 3 application ? automotive sot-223 pkg ordering information device package LM1117Qs-adj sot-223 3l LM1117Qs-x.x x.x = output voltage = 1.2v, 1.5v, 1.8v, 2.5v, 2.85v, 3.3v, 5.0v descripsion the LM1117Q is a low power positive-voltage regulator designed 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 sc si bus, and portable computers. the LM1117Q features very low quiescent current and very low dropout volt age of 1v at a full load and lower as output current decreases. LM1117Q is available as an adjustable or fi xed 1.2v, 1.5v, 1.8v, 2.5v, 2.85, 3.3v, and 5.0v output voltages. the LM1117Q is offered in a 3-pin surfac e mount package sot-223. the output capacitor of 10 ? o r larger is needed for output stability of LM1117Q as required by most of the other regulator circuits. absolute maximum ratings (t a = 25 , unless otherwise specified) characteristic symbol min. max. unit dc input voltage v in - 15 v lead temperature (soldering, 5 seconds) t sol - 260 operating junction temperature range t opr -40 125 storage temperature range t stg -65 150 free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 2 - htc ordering information v out package order no. package marking supplied as status adj sot-223 LM1117Qs-adj 1117q adj reel active 1.2v sot-223 LM1117Qs-1.2 1117q 1.2 reel active 1.5v sot-223 LM1117Qs-1.5 1117q 1.5 reel active 1.8v sot-223 LM1117Qs-1.8 1117q 1.8 reel active 2.5v sot-223 LM1117Qs-2.5 1117q 2.5 reel active 2.85v sot-223 LM1117Qs-2.85 1117q 2.85 reel active 3.3v sot-223 LM1117Qs-3.3 1117q 3.3 reel active 5.0v sot-223 LM1117Qs-5.0 1117q 5.0 reel active package type : root name product code lm 1117 output voltage : adj / 1.2 / 1.5v / 1.8v / 2.5v / 2.85v / 3.3v / 5.0v s: sot-223 q : q100 certified free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 3 - htc pin configuration sot-223 pin description pin no. sot-223 name function 1 adj/gnd adjustable / ground 2 v out output voltage 3 vi n input voltage free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 4 - 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 15 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 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 15 v i d quiescent current v in - v o = 5v 5 10 ? i o current limit v in - v o = 5v 1000 1250 ? 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 free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 5 - 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 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 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 free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 6 - 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 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 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 free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 7 - 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 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 15 v i d quiescent current v in - v o = 5v 5 10 ma i o current limit v in - v o = 5v 1000 1250 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 free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 8 - 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 free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 9 - htc fig.3 voltage regulator with reference fig.4 battery backed-up regulated supply free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 10 - 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 free datasheet http:///
1a l.d.o voltage regulator (automotive grade) LM1117Q jul. 2011 rev. 1.0 - 11 - htc application information maximum output current capability the LM1117Q can deliver a continuous current of 1a over the full operating junction temperature range. however, the output current is limited by the restriction of pow er dissipation which differs 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 LM1117Q. under all possible conditions, the junction temperature must be within the range specified under operating conditions. th e 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 LM1117Q is available in sot223 package. 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, no heat sink is needed since the package can dissipate enough heat to satisfy these 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 no heat sink / no air flow / no adjacent heat source / 0.066 inch 2 copper area. (t a =25c) free datasheet http:///

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