technical data feb 03 , 20 1 5 , ver. 0 7 description the il1117c is a series of low dropout voltage regulators which can provide up to 1a of output cu r- rent. the il1117c is available in eight fixed voltage, 1.2, 1.25, 1.5, 1.8, 2.5, 2.85, 3.3 and 5.0v. addit i onally it is also available in adjustable version. on chip precision trimming a d justs the reference/ output voltage to within 2%. current limit is also trimmed to ensure specified output current and controlled short - circuit current. the il11 17c series is available in sot - 223 , to - 252, to - 220 packages. a minimum of 10uf tantalum capacitor is required at the output to improve the transient response and s tabi l ity . fe a tures ? dropout v o l tage C 1.2v(typ) ? referen ce/output vo l tage trimmed to 2 % ? max imum input voltage C 15v ? adjustable ou t put voltage or fixed 1.2v, 1.25v, 1.5v, 1.8v, 2.5v, 2.85v, 3.3v, 5v ? line regulation typically at 0.2% max ? load regulation typically at 0.4% max ? current limiting and thermal prote c tion ? standard 3 - pin power packages ? ope rating junction temperature range - 40 to +125c il1117c - xxet il1117c - xxd0t il1117c - xxkb (for il1117c - 1.2v - 0 to +150 c) applications post regulator for switching dc/dc converter high efficiency linear regulator bat tery chargers pc add on card motherboard clock supplies lcd monitor set - top box absolute maximum ratings symbol description max units vin input voltage 15 v iout dc output current pd/(vin - vo) ma tj operating junction temper a ture range ( * in ca se of il1117c - 1.2) - 40 to 125 ( * 0 to 150) c ja thermal resistance junction - to - ambient (sot - 223) 150 c/w ja thermal resistance junction - to - ambient (to - 252) 80 c/w ja thermal resistance junction - to - ambient (to - 220) 60 c/w j c thermal resistance j unction - to - case (sot - 223) 35 c/w j c thermal resistance junction - to - case (to - 252) 22 c/w j c thermal resistance junction - to - case (to - 220) 15 c/w * 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 ind i- cated under recommended opera t ing conditions is not implied. exposure to absolute - maximum - rated conditions for extended periods may affect device reliability. il1117c - x xlow dropout positive voltage regulator 1. a dj/gnd 2. output 3. input sot - 223 to - 220 to - 252 p in#2 connected with heat sink ordering information device package packing il1 117 c xx et to - 2 2 3 tape & reel il1117 c xxd0t to - 2 52 tape & reel il 1117 c - xxkb to - 220 tube
il 1117 c - xx feb 03 , 2015 ver. 0 7 electrical characteristics tj = - 40 c to +125c ( for il1117c - 1.2 tj = 0 to +150 c ) unless ot h erwise specified parameter conditions min typ max unit output voltage il1117c - 1.2 il1117c - 1.25 (adjustable) il1117c - 1.5 il1117c - 1.8 il1117c - 2.5 il1117c - 2.85 il1117c - 3.3 il1117c - 5.0 io = 10ma to 1.0a, vin = 2.7 to 12.0v io = 10ma to 1.0a, vin = 2.8 to 1 2 . 0 v io = 10ma to 1.0a, vin = 3.0 to 12.0v io = 10ma to 1.0a, vin = 3.3 to 12.0v io = 10ma to 1.0a, vin = 4.0 to 12.0v io = 10ma to 1.0a, vin = 4.4 to 12.0v io = 10ma to 1.0a, vin = 4.8 to 12.0v io = 10ma to 1.0a, vin = 6.5 to 1 2 .0v 1.176 1.225 1.470 1.764 2.450 2.790 3.240 4.900 1.200 1.250 1.500 1.800 2.500 2.850 3.300 5.000 1.224 1.280 1.530 1.836 2.550 2.910 3.360 5.10 0 v line regulation il1117c - 1.2 il1117c - 1.25 ( adjus t able ) il1117c - 1.5 il1117c - 1.8 il1117c - 2.5 il1117c - 2.85 il1117c - 3.3 il1117c - 5.0 io =10ma, vin = 2.7 to 12.0v io =10ma, vin = 2.8 to 12.0 v io =10ma, vin = 3.0 to 12.0v io =10ma, vi n = 3.3 to 12.0v io =10ma, vin = 4.0 to 12.0v io =10ma, vin = 4.4 to 12.0v io =10ma, vin = 4.8 to 12.0v io =10ma, vin = 6.5 to 1 2 .0v 2.0 0.1 2.0 2.0 2.0 2.0 3.0 4.0 7.0 0.2 7.0 7.0 7.0 7.0 7.0 10.0 mv % mv mv mv mv mv mv load regulation il1117c - 1.2 il1117c - 1.25 ( adjus t able ) il1117c - 1.5 il1117c - 1.8 il1117c - 2.5 il1117c - 2.85 il1117c - 3.3 il1117c - 5.0 io = 10ma to 1.0a, vin = 3.2 v io = 10ma to 1.0a, vin = 3.3 v io = 10ma to 1.0a, vin = 3.5v io = 10ma to 1.0a, vin = 3.8v io = 10ma to 1.0a, vin = 4.5v io = 10ma to 1.0a, vin = 4.85v io = 10ma to 1.0a, vin = 5.3v io = 10ma to 1.0a, vin = 7.0v 3.0 0.2 3.0 3.0 3.0 3.0 4.0 5.0 10.0 0.4 10.0 10.0 10.0 10.0 12.0 15.0 mv % mv mv mv mv mv mv dropout voltage (2) all models i o =1a ( t j = 25 c ) 1.20 1.30 v i o =1a ( tj = - 40 c to +125c) 1.20 1.55 current limit v in - vo = 5 v ( t j = 25 c ) 1000 ma minimum load current adjustable models v in = 13.75v 5 ma quiescent current v in - vo = 1. 5v 5.2 10 ma adjust pin current i o = 10ma, v in - vo = 1.4 to 10v 50 120 ua vs load current, il1117c i o = 10ma to 1a, v in - vo = 1.4 to 10v 0.5 5 ua temperature drift tj = - 40 c to +125c 0.5 % rms output noise bandwidth of 10hz to 10khz at 25 c 0.003 %vo rippl e rejection ratio 120hz input ri p ple(cadj for adj) = 25uf v in - v o = 5v , i o = 1 .0 a tj = - 40 c to +125c 60 72 db notes: (1) il1117c - x adjustable versions require a minimum load current for 3% regulation. (2) dropout voltage is the input vol tage minus output voltage that produces a 1% decrease in output voltage.
il 1117 c - xx feb 03 , 2015 ver. 0 7 block diagram application information figure 1. fixed - voltage model figure 2. adjustable - voltage model basic connections. -- basic co n nections. vo=vref(1+r2/r1) + iadj*r2 il1117 c il1117 c (adj)
il 1117 c - xx feb 03 , 2015 ver. 0 7 typical perfomance characteristics
il 1117 c - xx feb 03 , 2015 ver. 0 7 typical perfomance characteristics (continue) figure 3.
il 1117 c - xx feb 03 , 2015 ver. 0 7 application information output voltage adjustment like most regulators, the il1117c regulates the output by comparing the output voltage to an internally ge n- erated reference voltage. on the adjustable version as shown in fig.4, the v ref is available externally as 1.25v between v out and adj. the voltage ratio formed by r1 and r2 should be set to conduct 10ma (min u- mum output load). the output voltage is given by the following equation: vo=vref(1+r2/r1)+iadj*r2 on fixed versions of il1117c , the voltage divider is provided interna l- ly. fi g ure 4 . basic adjustable regulator input bypass capacitor an input capacitor is recommended. a 10 f tantalum on the input is a suitable input bypas s ing for almost all applications. adjust terminal bypass capacitor the adjust terminal can be bypassed to g round with a bypass capac i tor (c adj ) to improve ripple rejection. this bypass capacitor prevents ripple from being amplified as the output voltage is i n creased. at any ripple frequency, the impedance of the c adj should be less than r1 to prevent the ripple from being ampl i fied: the r1 is the resistor between the output and the adjust pin. its value is normally in the range of 100 - 200 . for example, with r1 = 124 ? ? and f ripple = 120hz, the c adj should be ?? 11 f. output capacitor il1117c requires a capacitor from v out to gnd to provide compens a tion feedback to the internal gain stage. this is to ensure stability at the output terminal. typically, a 10 f tantalum or 50 f aluminum ele c trolytic is sufficient. note: the esr is typically 1.0 . the output capacitor does not have a theoretical upper limit and increasing its value will i n crease stability. c out = 100 f or more is typical for high current regulator design. load regulation when the adjustable regulator is used (fig.5), the best load regulation is accomplished when the top of the resistor divider (r1) is connected directly to the output pin of the il1117c . when so connected, r p is not mu l tiplied by the divider ratio. for fixed output version, the top of r1 is internally connected to the output and ground pins can be co n nected to low side of the load.
il 1117 c - xx feb 03 , 2015 ver. 0 7 fig ure 5 . best load regulation using adjustable output regulator thermal pro tection il1117c has thermal protection which limits junction temperature to 150 ? c. however, device functionality is only guaranteed to a maximum junction temperature of +125 ? c. the power dissipation and junction temper a- ture for il1117c in dpak package are given by note: t junction must not exceed 125 ? c current limit protection il1117c is protected against overload conditions. current protection is triggered at typically 1.6a. thermal consideration the il1117c series contain thermal limiting circuitry de signed to protect itself from over - temperature cond i- tions. even for normal load conditions, maximum junction temperature ratings must not be e x ceeded. as mention in thermal protection section, we need to consider all sources of thermal resistance between j unction and ambient. it includes junction - tocase, case - to - heat - sink interface, and heat sink the r mal resistance itself. junction - to - case thermal resistance is specified from the ic junction to the bottom of the case directly below the die. proper mounting is r e quired to ensure the best possible thermal flow from this area of the package to the heat sink. the case of all devices in this series is ele c trically connected to the output. therefore, if the case of the device must be electrically isolated, a ther mally conductive spacer is reco m mended.
il 1117 c - xx feb 03 , 2015 ver. 0 7 symbol dimension in millimeters dimension in inches min max min max a 1.520 1.800 0.060 0.071 a1 0.000 0.100 0.000 0.004 a2 1.600 1.700 0.063 0.067 b 0.680 0.780 0.027 0.031 c 0.230 0.280 0.009 0.011 d 6.400 6.500 0.252 0.256 d1 2.950 3.070 0.116 0.121 e 3.400 3.600 0.134 0.142 e1 6.800 7.200 0.268 0.283 e 2.300 (bsc) 0.091 (bsc) e1 4.6 (bsc) 1.811 (bsc) l 0.450 0.650 0.018 0.026 0 ? 10 ? 0 ? 10 ?
il 1117 c - xx feb 03 , 2015 ver. 0 7
il 1117 c - xx feb 03 , 2015 ver. 0 7
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