www.fairchildsemi.com rev. 1.0.1 9/27/01 features ? low dropout voltage ? load regulation: 0.05% typical ? trimmed current limit ? on-chip thermal limiting ? standard sot-223 and to-252 packages ? three-terminal ?xed 1.2v applications ? post regulator for switching supplies ? supply for low-voltage processors description the fan1112 is a 1.2v low dropout three-terminal regulator with 1a output current capability. the device has been optimized for low voltage where transient response and minimum input voltage are critical. current limit is trimmed to ensure speci?ed 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 fan1112 ?ows into the load, increasing ef?ciency. the fan1112 regulator is available in the industry-standard sot-223 and to-252 (dpak) power packages. typical application v in = 3.3v v in v out gnd 1.2v at 1a fan1112 10 f ++ 22 f fan1112 1a 1.2v low dropout linear regulator
product specification fan1112 2 rev. 1.0.1 9/27/01 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 more than 50c/w. other mounting techniques may provide better thermal resistance than 30c/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* ta b i s v out tab is v out 1 gnd out in 23 3 2 1 in out gnd 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)
fan1112 product specification rev. 1.0.1 9/27/01 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. output current must be limited to meet the absolute maximum ratings of the part. parameter conditions min. typ. max. units output voltage 3 10ma i out 1a fan1112, 3.0v v in 7.2v ? 1.140 1.200 1.260 v line regulation 1,2 3.0v 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 gnd pin current ? 35 120 a gnd pin current change 3.0v v in 7v, 10ma i out 1a ? 0.2 5 a minimum load current 3.0v v in 15v ? 10 ma quiescent current v in = 7v ? 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 3 c/w thermal shutdown junction temperature 155 c thermal shutdown hysteresis 10 c
product specification fan1112 4 rev. 1.0.1 9/27/01 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 1.225 1.220 1.215 1.210 1.205 1.200 1.195 1.190 1.185 1.180 1.175 0 0 0.6 0.8 0.4 0.2 output current (a) junction temperature ( c) junction temperature ( c) dropout voltage (v) 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) 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 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 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 figure 2. dropout voltage vs. output current figure 3. load regulation vs. temperature figure 4. reference voltage vs. temperature figure 5. minimum load current vs. temperature figure 6. gnd pin current vs. temperature figure 7. short-circuit current vs. temperature
fan1112 product specification rev. 1.0.1 9/27/01 5 typical performance characteristics (continued) 10 7.5 5 2.5 0 power (w) case temperature ( c) 25 45 65 85 105 125 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 = 1a figure 8. ripple rejection vs. frequency figure 9. maximum power dissipation
product specification fan1112 6 rev. 1.0.1 9/27/01 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
fan1112 product specification rev. 1.0.1 9/27/01 7 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 fan1112 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 9/27/01 0.0m 007 stock#ds30001112 ? 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 package fan1112d to-252 fan1112s sot-223
product folder - fairchild p/n fan1112 - product information fairchild semiconductor space space space search | parametric | cross reference space product folders and datasheets application notes space space space find products home >> find products >> space space space space products groups space analog and mixed signal discrete interface logic microcontrollers non-volatile memory optoelectronics markets and applications new products product selection and parametric search cross-reference search technical information buy products technical support my fairchild company fan1112 product information related links request samples dotted line how to order products dotted line product change notices (pcns) dotted line support dotted line distributor and field sales representatives dotted line quality and reliability dotted line design tools contents general description | features | applications | product status/pricing/packaging general description the fan1112 is a 1.2v low dropout three- terminal regulator with 1a output current capability. the device has been optimized for low voltage where transient response and minimum input voltage are critical. current limit is trimmed to ensure specified 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 fan1112 fows into the load, increasing efficiency. the fan1112 regulator is available in the industry- standard sot-223 and to-252 (dpak) power packages. back to top features l low dropout voltage l load regulation: 0.05% typical l trimmed current limit l on-chip thermal limiting l standard sot-223 and to-252 packages l three-terminal fixed 1.2v space datasheet download this datasheet pdf e-mail this datasheet [e- mail] this page print version file:///h|/imaging/bitting/cpl/20020725_1/07252002_10/fair/07252002/fan1112.html (1 of 2) [jul/26/2002 4:35:06 pm]
product folder - fairchild p/n fan1112 - product information back to top applications l post regulator for switching supplies l supply for low-voltage processors back to top product status/pricing/packaging product product status pricing* package type leads package marking packing method fan1112sx full production $0.471 sot-223 4 $y&z&2&t 1112s $.$.$. tape reel FAN1112DX full production $0.471 to-252(dpak) 3 $y&z&2&t 1112d k tape reel * 1,000 piece budgetary pricing back to top space space home | find products | technical information | buy products | support | company | contact us | site index | privacy policy ? copyright 2002 fairchild semiconductor space space file:///h|/imaging/bitting/cpl/20020725_1/07252002_10/fair/07252002/fan1112.html (2 of 2) [jul/26/2002 4:35:06 pm]
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