www.fairchildsemi.com rev. 1.0.1 2/8/01 features ? low dropout voltage ? load regulation: 0.05% typical ? current limit ? on-chip thermal limiting ? standard sot-223 and to-252 packages ? three-terminal adjustable or ?xed 2.5v, 3.3v or 5v applications ? usb controlled power supply ? high ef?ciency linear regulators for mixed voltage logic, asic, fpga based systems ? post regulators for switching supplies ? battery chargers ? 12v to 5v, 3.3v, 2.5v, or adjustable linear regulators ? motherboard clock supplies ? sdram module supplies description the fan1616a and fan1616a-2.5, -3.3 and -5 are low dropout three-terminal regulators with 0.5a output current capability. these devices have been optimized for applica- tions where transient response and minimum dropout voltage are critical. the 5v version is designed also to be used in usb hub and motherboard applications. on-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. unlike pnp type regulators where up to 10% of the output current is wasted as quiescent current, the bias current of the fan1616a ?ows into the load, increasing ef?ciency. the fan1616a series regulators are available in the indus- try-standard sot-223 and to-252 power packages. typical applications v in = 12v v in v out adj 9v at 0.5a fan1616a 10 f22 f 124 ? 768 ? v in = 9v v in v out gnd 3.3v at 0.5a fan1616a-3.3 10 f ++ + + 22 f fan1616a 0.5a adjustable/fixed low dropout linear regulator
product specification fan1616a 2 rev. 1.0.1 2/8/01 pin assignments *with package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ja can vary from 30c/w to >50c/w. other mounting techniques may provide better power dissipation than 30c/w. absolute maximum ratings figure 1. absolute maximum safe operating area parameter min. max. unit v in 13.2 v (v in ? out ) * i out see figure 1 operating junction temperature range 0 125 ? storage temperature range -65 150 ? lead temperature (soldering, 10 sec.) 300 ? front view front view fan1616as (variable) fan1616as-x (fixed) fan1616am (variable) fan1616am-x (fixed) 4-lead plastic sot-223 jc = 15 c/w* 3-lead plastic to-252 jc = 3 c/w* tab is v out 1 adj/ gnd out in 2 3 3 2 1 in out adj/gnd 0.6 0.5 0.4 0.3 0.2 0.1 0 068 10 12 4 2 v in v out (v) i out (a)
fan1616a product specification rev. 1.0.1 2/8/01 3 electrical characteristics operating conditions: v in 12v, 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. 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. fan1616a 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 ) 5.75v, 10ma i out 0.5a ? 1.225 (-2%) 1.250 1.275 (+2%) v output voltage 4 10ma i out 0.5a fan1616a-2.5, 4.0v v in 12v fan1616a-3.3, 4.5v v in 12v fan1616a-5, 6.2v v in 12v ? ? ? 2.450 3.234 4.900 2.500 3.300 5.000 2.550 3.366 5.100 v v v line regulation 1,2 (v out + 1.5v) v in 12v, i out = 10ma ? 0.005 0.2 % load regulation 1,2,3 (v in v out ) = 2v, 10ma i out 0.5a ? 0.05 0.5 % dropout voltage ? v ref = 1%, i out = 0.5a ? 1.000 1.200 v adjust pin current 3 ? 35 120 a adjust pin current change 3, 4 1.5v (v in v out ) 12v, 10ma i out 0.5a ? 0.2 5 a minimum load current 1.5v (v in v out ) 12v ? 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 = 0.5a 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, juncation to case sot-223 15 c/w to-252 3 c/w thermal shutdown 150 c
product specification fan1616a 4 rev. 1.0.1 2/8/01 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 output 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) output 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 ? i = 0.5a v out = 3.6v 1 v out set with 1% resistors v out = 3.3v note: 1. fan1616a only note: 1. fan1616a only note: 1. fan1616a only t j = 25 c 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
fan1616a product specification rev. 1.0.1 2/8/01 5 typical performance characteristics (continued) 4 3 2 1 0 power (w) case temperature ( c) 50 60 70 80 90 100 110 120 140 130 150 to-252 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 = 0.5a figure 8. ripple rejection vs. frequency figure 9. maximum power dissipation
product specification fan1616a 6 rev. 1.0.1 2/8/01 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 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.
fan1616a product specification rev. 1.0.1 2/8/01 7 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
product specification fan1616a 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 2/8/01 0.0m 005 stock#ds30001616 ? 2001 fairchild semiconductor corporation ordering information product number package fan1616am to-252 fan1616as sot-223 fan1616am-2.5 to-252 fan1616as-2.5 sot-223 fan1616am-3.3 to-252 fan1616as-3.3 sot-223 fan1616am-5 to-252 fan1616as-5 sot-223 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.
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