?2009 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.1 features ? output current in excess of 1.5a ? output adjustable between 1.2v and 37v ? internal thermal overload protection ? internal short circuit current limiting ? output transistor safe area compensation ? to-220 package description this monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply more than 1.5a of load current with an ou tput voltage adjustable over a 1.2v to 37v. it employs internal current limiting, thermal shut down and safe area compensation. to-220 1. adj 2. output 3. input 1 output internal block diagram rlimit 3 vin vo 1 voltage reference vad j 2 protection circuitry + - input output ka317 3-terminal positive adjustable regulator
ka317 2 absolute maximum ratings electrical characteristics (v i -v o = 5v, i o = 0.5a, 0 c t j +125 c, i max = 1.5a, p dmax = 20w, unless otherwise specified) note : 1. load and line regulation are specified at constant junction temp erature. change in v d due to heating effects must be taken into account separately . pulse testing with low duty is used. (p max = 20w) 2. c adj , when used, is connected between the adjustment pin and ground. 3. these parameters, although guarante ed, are not 100% tested in production. parameter symbol value unit input-output voltage differential v i - v o 40 v lead temperature t lead 230 c power dissipation p d internally limited w operating junction temperature range t j 0 ~ +125 c storage temperature range t stg -65 ~ +125 c temperature coefficient of output voltage vo/ t 0.02 %/ c parameter symbol conditions min typ. max. unit line regulation (note1) rline t a = +25 c 3v v i - v o 40v - 0.01 0.04 %/v 3v v i - v o 40v - 0.02 0.07 %/v load regulation (note1) rload t a = +25 c, 10ma i o i max v o < 5v v o 5v -18 0.4 25 0.5 mv %/v o 10ma i o i max v o < 5v v o 5v -40 0.8 70 1.5 mv %/v o adjustable pin current i adj --46100 a adjustable pin current change i adj 3v v i - v o 40v 10ma i o i max p d p max -2.05 a reference voltage v ref 3v v in - v o 40v 10ma i o i max p d p max 1.20 1.25 1.30 v temperature stab ility (note3) st t --0.7-%/v o minimum load current to maintain regulation i l(min) v i - v o = 40v - 3.5 12 ma maximum output current i o(max) v i - v o 15v, p d p max v i - v o 40v, p d p max t a =25 c 1.5 - 2.2 0.3 - -a rms noise, % of v out (note3) e n t a = +25 c, 10hz f 10khz - 0.003 0.01 %/v o ripple rejection (note3) rr v o = 10v, f = 120hz without c adj c adj = 10 f (note2) 66 60 75 -db long-term stability, t j = t high st t a = +25 c for end point measurements, 1000hr -0.31 % thermal resistance junction to case r jc - -5- c/w
ka317 3 typical performan ce characteristics figure 1. load regulation figure 3. dropout voltage figure 2. adjustment current figure 4. reference voltage temperature ( c) output voltage deviation(%) temperature ( c) input-output differential(v) temperature ( c) adjustment current(ua) temperature ( c) reference voltage(v)
ka317 4 typical application figure 5. programmable regulator c i is required when regulator is located an a ppreciable distance from power supply filter. c o is not needed for stability, however, it does improve transient response. since i adj is controlled to less than 100 a, the error associated with this term is negligible in most applications. ka317 vi vo vadj r 1 output input r 2 co 1uf ci 0.1uf adj iadj v o = 1.25v (1+r 2 /r 1 )+i adj r 2
ka317 5 mechanical dimensions package dimensions in millimeters 4.50 0.2 0 9.90 0.20 1.52 0.10 0.80 0.10 2.40 0.20 10.00 0.20 1.27 0.10 ?.60 0.10 (8.70) 2.80 0.10 15.90 0.20 10.08 0.30 18.95max. (1.70) (3.70) (3.00) (1.46) (1.00) (45 ) 9.20 0.20 13.08 0.20 1.30 0.10 1.30 +0.1 0 ?.0 5 0.50 +0.10 ?.05 2.54typ [2.54 0.20 ] 2.54typ [2.54 0.20 ] to-220
ka317 11/19/09 0.0m 001 stock#ds400293 ? 2009 fairchild semiconductor corporation 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 lif e, 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 an y component of a life support device or system whose fa ilure 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 disclaimer fairchild semiconductor reserves the right to make changes with out further notice to any products herein to improve re liability, function or design. fairchild does not assume any liability arising out of the applic ation or use of any product or circuit described herein; neither does it convey any license under its pat ent rights, nor the rights of others.v ordering information product number package operating temperature ka317 to-220 0 c to +125 c
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