www.fairchildsemi.com rev. 1.0.6 3/12/02 features low dropout voltage load regulation: 0.05% typical trimmed current limit on-chip thermal limiting standard sot-223, to-220, and to-252 packages three-terminal adjustable or ?ed 1.8v, 2.5v, 2.85v, 3.3v, 5v applications active scsi terminators high ef?iency linear regulators post regulators for switching supplies battery chargers 12v to 5v linear regulators motherboard clock supplies description the fan1117a and fan1117a-1.8, -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 fan1117a ?ws into the load, increasing ef?iency. the fan1117a series regulators are available in the industry-standard sot-223, to-220, and to-252 (dpak) power packages. typical applications v in = 12v v in v out adj 9v at 1a fan1117a 10 f22 f r1 124 ? r2 768 ? v in = 12v v in v out gnd 5v at 1a fan1117a-2.85 10 f ++ + + 22 f v out = v ref (1 + r2/r1) + i adj ?r2 fan1117a 1a adjustable/fixed low dropout linear regulator
product specification fan1117a 2 rev. 1.0.6 3/12/02 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 figure 1. absolute maximum safe operating area parameter min. max. unit v in 18 v (v in ?v out ) * i out see figure 1 operating junction temperature range 0 125 c storage temperature range -65 150 c lead temperature (soldering, 10 sec.) 300 c front view front view 4-lead plastic sot-223 jc = 15 c/w* 3-lead plastic to-252 jc = 3 c/w* 3-lead plastic to-220 jc = 3 c/w* tab is v out tab is v out front view tab is v out 1 adj/ gnd out in 23 3 2 1 in out adj/gnd adj/ gnd out in 12 3 1.2 1.0 0.8 0.6 0.4 0.2 0 068 10 12 14 16 18 20 4 2 v in v out (v) i out (a)
fan1117a product specification rev. 1.0.6 3/12/02 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. fan1117a only. 4. output current must be limited to meet the absolute maximum ratings of the part. parameter conditions min. typ. max. units reference voltage 3 1.5v (v in v out ) 7v, 10ma i out 1a ? 1.225 (-2%) 1.250 1.275 (+2%) v output voltage 4 10ma i out 1a fan1117a-1.8, 3.3v v in 8.8v fan1117a-2.5, 4v v in 9.5v fan1117a-2.85, 4.35v v in 9.85v fan1117a-3.3, 4.8v v in 10.3v fan1117a-5, 6.5v v in 12v ? ? ? ? ? 1.764 2.450 2.793 3.234 4.900 1.8 2.5 2.85 3.3 5.0 1.836 2.550 2.907 3.366 5.100 v v v v v line regulation 1,2 (v out + 1.5v) v in 12v, 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 3 ? 35 120 a adjust pin current change 3,4 1.5v (v in v out ) 7v, 10ma i out 1a ? 0.2 5 a minimum load current 1.5v (v in v out ) 15v ? 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-220 3 c/w thermal shutdown junction temperature 155 c thermal shutdown hysteresis 10 c
product specification fan1117a 4 rev. 1.0.6 3/12/02 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 1.260 1.255 1.250 1.245 1.240 1.235 1.230 1.225 1.220 1.215 1.210 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. fan1117a only note: 1. fan1117a only figure 2. dropout voltage vs. output current figure 3. load regulation vs. temperature figure 4. reference voltage vs. temperature figure 5. output voltage vs. temperature figure 6. minimum load current vs. temperature figure 7. adjust pin current vs. temperature
fan1117a product specification rev. 1.0.6 3/12/02 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 to-252, to-220 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 figure 8. short-circuit current vs. temperature figure 9. ripple rejection vs. frequency figure 10. maximum power dissipation
product specification fan1117a 6 rev. 1.0.6 3/12/02 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
fan1117a product specification rev. 1.0.6 3/12/02 7 mechanical dimensions (continued) 3-lead to-220 package a .140 .190 3.56 4.83 symbol inches min. max. min. max. millimeters notes b .015 .040 .38 1.02 .070 1.78 b1 .045 1.14 c1 .014 .022 .36 .56 p .139 .161 3.53 4.09 d .560 .650 14.22 16.51 .380 .420 9.65 10.67 .090 .110 2.29 2.79 e e e1 .190 .210 4.83 5.33 .045 1.14 .020 .055 .51 1.40 e3 f h1 .230 .270 5.94 6.87 .080 .115 2.04 2.92 .500 .580 12.70 14.73 j1 l 6.35 bsc .250 bsc l1 .100 .135 2.54 3.43 3 7 3 7 q b1 b e3 l1 l h1 q e e e1 e-pin p c1 j1 d f a (5x) notes: 1. dimension c1 apply for lead finish.
product specification fan1117a 8 rev. 1.0.6 3/12/02 mechanical dimensions (continued) 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 c .018 .024 0.46 0.61 c2 .018 .023 0.46 0.58 d .210 .245 5.33 6.22 1 4 1 4 3 e .250 .265 6.35 6.73 .090 bsc 2.29 bsc .108 ref 2.74 ref .370 .410 9.40 10.41 e h l .055 .070 1.40 1.78 l1 .035 .080 0.89 2.03 .025 .040 0.64 1.02 .215 5.46 b3 .205 5.21 l3 l4 e b3 @pkg/ @heatsink d l3 a -c- h c2 l l1 -a- = 0 10 -b- e-pin b2 l4 b e notes: 1. 2. 3. 4. 5. 6. dimensions are exclusive of mold flash, metal burrs or interlead protrusion. 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 dimension b3 and l3. formed leads to be planar with respect to one another at seating place -c-. dimensions and tolerances per asme y14.5m-1994.
product specification fan1117a 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 3/12/02 0.0m 007 stock#ds30001117a ? 2002 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 package fan1117adx to-252 in tape and reel fan1117asx sot-223 in tape and reel fan1117ad18x to-252 in tape and reel fan1117as18x sot-223 in tape and reel fan1117ad25x to-252 in tape and reel fan1117as25x sot-223 in tape and reel fan1117ad285 to-252 fan1117as285 sot-223 fan1117ad33x to-252 in tape and reel fan1117as33x sot-223 in tape and reel fan1117at33 to-220 fan1117ad5x to-252 in tape and reel fan1117as5x sot-223 in tape and reel
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