www.fairchildsemi.com rev. 1.3.0 3/28/02 features low dropout voltage load regulation: 0.05% typical trimmed current limit on-chip thermal limiting standard sot-223, to-263, and to-252 packages three-terminal adjustable or ?ed 2.5v, 2.85v, 3.3v, 5v applications active scsi terminators high ef?iency linear regulators post regulators for switching supplies battery chargers 5v to 3.3v linear regulators motherboard clock supplies description the rc1117 and rc1117-2.5, -2.85, -3.3 and -5 are low dropout three-terminal regulators with 1a output current capability. these devices have been optimized for low voltage where transient response and minimum input voltage are critical. the 2.85v version is designed speci?ally to be used in active terminators for scsi bus. current limit is trimmed to ensure speci?d output current and controlled short-circuit current. on-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. unlike pnp type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the rc1117 ?ws into the load, increasing ef?iency. the rc1117 series regulators are available in the industry- standard sot-223, to-263 (d2pak), and to-252 (dpak) power packages. typical applications v in = 3.3v v in v out adj 1.5v at 1a rc1117 10 f22 f r1 124 ? r2 24.9 ? v in = 5v v in v out gnd 2.85v at 1a rc1117-2.85 10 f ++ + + 22 f v out = v ref (1 + r2/r1) + i adj ?r2 rc1117 1a adjustable/fixed low dropout linear regulator
product specification rc1117 2 rev. 1.3.0 3/28/02 pin assignments *with package soldered to 0.5 square inch copper area over backside ground plane or internal power plane., ja can vary from 30?/w to more than 50?/w. other mounting techniques may provide better thermal resistance than 30?/w. absolute maximum ratings parameter min. max. unit v in 7.5 v operating junction temperature range 0 125 c storage temperature range -65 150 c lead temperature (soldering, 10 sec.) 300 c front view 4-lead plastic sot-223 jc = 15 c/w* 3-lead plastic to-252 jc = 3 c/w* tab is v out tab is v out 1 adj/ gnd in 23 3-lead plastic to-263 jc = 3 c/w* tab is v out 1 adj/ gnd in out 2 3 3 2 1 in out adj/gnd
rc1117 product specification rev. 1.3.0 3/28/02 3 electrical characteristics operating conditions: v in 7v, t j = 25 c unless otherwise speci ed. the ? denotes speci cations which apply over the speci ed operating temperature range. notes: 1. see thermal regulation specifications for changes in output voltage due to heating effects. load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. line and load regulation are guaranteed up to the maximum power dissipation (18w). power dissipation is determined by input/output differential and the output current. guaranteed maximum output power will not be available over the full input/ output voltage range. 3. rc1117 only. parameter conditions min. typ. max. units reference voltage, v ref 3 1.5v (v in - v out ) 5.75v, 10ma i out 1a ? 1.225 (-2%) 1.250 1.275 (+2%) v output voltage 10ma i out 1a rc1117-2.5, 4v v in 7v rc1117-2.85, 4.35v v in 7v rc1117-3.3, 4.8v v in 7v rc1117-5, 6.5v v in 7v ? ? ? ? 2.450 2.793 3.234 4.900 2.5 2.85 3.3 5.0 2.550 2.907 3.366 5.100 v v v v line regulation 1,2 (v out + 1.5v) v in 7v, i out = 10ma ? 0.005 0.2 % load regulation 1,2 (v in v out ) = 2v, 10ma i out 1a ? 0.05 0.5 % dropout voltage ? v ref = 1%, i out = 1a ? 1.100 1.200 v current limit (v in v out ) = 2v ? 1.1 1.5 a adjust pin current, i adj 3 ? 35 120 a adjust pin current change 3 1.5v (v in v out ) 5.75, 10ma i out 1a ? 0.2 5 a minimum load current 1.5v (v in v out ) 5.75 ? 10 ma quiescent current v in = v out + 1.25v ? 413ma ripple rejection f = 120hz, c out = 22 f tantalum, (v in v out ) = 3v, i out = 1a 60 72 db thermal regulation t a = 25 c, 30ms pulse 0.004 0.02 %/w temperature stability ? 0.5 % long-term stability t a = 125 c, 1000hrs. 0.03 1.0 % rms output noise (% of v out ) t a = 25 c, 10hz f 10khz 0.003 % thermal resistance, junction to case sot-223 15 c/w to-252, to-263 3 c/w thermal shutdown junction temperature 155 c thermal shutdown hysteresis 10 c
product specification rc1117 4 rev. 1.3.0 3/28/02 typical performance characteristics 1.5 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 1.250 1.245 1.240 1.235 1.230 1.225 1.220 1.215 1.210 1.205 1.200 0 0 0.6 0.8 0.4 0.2 output current (a) junction temperature ( c) junction temperature ( c) junction temperature ( c) dropout voltage (v) reference voltage (v) 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 reference voltage (v) 100 90 80 70 60 50 40 30 20 10 0 adjust pin current ( a) 5 4 3 2 1 0 minimum load current (ma) dropout voltage deviation (%) 1.0 -75 -50 -25 0 25 50 75 100 125 150 175 -75 -50 -25 0 25 50 75 100 125 150 175 -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 t j = 125 c t j = 0 c t j = 25 c ? i = 1a v out = 3.6v 1 v out set with 1% resistors v out = 3.3v note: 1. rc1117 only note: 1. rc1117 only figure 1. dropout voltage vs. output current figure 2. load regulation vs. temperature figure 3. reference voltage vs. temperature figure 4. output voltage vs. temperature figure 5. minimum load current vs. temperature figure 6. adjust pin current vs. temperature
rc1117 product specification rev. 1.3.0 3/28/02 5 typical performance characteristics (continued) 2.0 1.75 1.5 1.25 1.0 short-circuit current (a) junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 10 7.5 5 2.5 0 power (w) case temperature ( c) 25 45 65 85 105 125 sot-223 90 80 70 60 50 40 30 20 10 0 ripple rejection (db) frequency (hz) 10 100 1k 10k 100k (v in - v out ) = 3v 0.5 < v ripple < 2v i out = 1a to-252 & to-263 figure 7. short-circuit current vs. temperature figure 8. ripple rejection vs. frequency figure 9. maximum power dissipation
product specification rc1117 6 rev. 1.3.0 3/28/02 mechanical dimensions 4-lead sot-223 package a .071 symbol inches min. max. min. max. millimeters notes a1 .181 .033 b .025 c .090 e .130 .148 e h .264 .287 .115 .124 .033 .041 10 f f i j d .248 .264 1.80 4.80 .840 .640 2.29 3.30 3.71 6.71 7.29 .012 .310 2.95 3.15 .840 1.04 10 10 16 k 10 16 .0008 .0040 l .0203 .1018 10 16 m 10 16 .010 .014 n .250 .360 6.30 6.71 a d e e c h a1 b i j k l m n
rc1117 product specification rev. 1.3.0 3/28/02 7 mechanical dimensions 3-lead to-252 package a .086 .094 2.19 2.39 symbol inches min. max. min. max. millimeters notes b .025 .035 0.64 0.89 .045 1.14 b2 .030 0.76 .215 5.46 4 3 4 b3 .205 5.21 c2 .018 .023 0.46 0.58 c .018 .024 0.46 0.61 d .210 .245 5.33 6.22 1 1 e .250 .265 6.35 6.73 .090 bsc 2.29 bsc .055 .070 1.40 1.78 e l .370 .410 9.40 10.41 h l1 .108 ref 2.74 ref .035 .080 0.89 2.03 .025 .040 0.64 1.02 l3 l4 e b3 @pkg/ @heatsink d l1 l3 l4 a -c- h c2 l = 0 10 -a- -b- e-pin b2 b c e notes: 1. 2. 3. 4. 5. 6. dimensions are exclusive of mold flash and metal burrs. stand off-height is measured from lead tip with ref. to datum -b-. foot length is measured with ref. to datum -a- with lead surface. thermal pad contour optional within dimensions b3 and l3 formed leads to be planar with respect to one another at seating plane -c-. dimensions and tolerances per asme y14.5m-1994.
product specification rc1117 8 rev. 1.3.0 3/28/02 mechanical dimensions 3-lead to-263 package a .160 .190 4.06 4.83 symbol inches min. max. min. max. millimeters notes b .020 .036 0.51 0.91 b2 .049 .051 1.25 1.30 c2 .045 .055 1.14 1.40 d .340 .380 8.64 9.65 .380 .405 9.65 10.29 .100 bsc e e l .575 .625 14.61 15.88 .090 .110 2.29 2.79 l1 l2 .055 1.40 .017 .019 0.43 0.78 r 0 8 0 8 notes: 1. dimensions are exclusive of mold flash and metal burrs. 2. standoff-height is measured from lead tip with ref. to datum -b-. 3. foot length is measured with ref. to datum -a- with lead surface (at inner r). 4. dimensi on exclusive of dambar protrusion or intrusion. 5. formed leads to be planar with respect to one another at seating place -c-. 2.54 bsc e @pkg/ @heatsink d l2 a -c- l c2 l1 r (2 plcs) -a--b- e-pin b2 b e
product specification rc1117 life support policy fairchild s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 3/28/02 0.0m 005 stock#ds30001117 ? 2001 fairchild semiconductor corporation disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. ordering information product number output package RC1117DX adjustable to-252 in tape and reel rc1117m adjustable to-263 rc1117mt adjustable to-263 in tape and reel rc1117st adjustable sot-223 in tape and reel rc1117d25x 2.5 volt to-252 in tape and reel rc1117m25 2.5 volt to-263 rc1117m25t 2.5 volt to-263 in tape and reel rc1117s25t 2.5 volt sot-223 in tape and reel rc1117m285 2.85 volt to-263 rc1117m285t 2.85 volt to-263 in tape and reel rc1117s285t 2.85 volt sot-223 in tape and reel rc1117d33x 3.3 volt to-252 in tape and reel rc1117m33 3.3 volt to-263 rc1117m33t 3.3 volt to-263 in tape and reel rc1117s33t 3.3 volt sot-223 in tape and reel rc1117d5x 5 volt to-252 in tape and reel rc1117m5 5 volt to-263 rc1117m5t 5 volt to-263 in tape and reel rc1117s5t 5 volt sot-223 in tape and reel
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