?2000 fairchild semiconductor international www.fairchildsemi.com rev. 5.0 features ? output current in excess of 0.5a ? output adjustable between 1.2v and 37v ? internal thermal-overload protection ? internal short-circuit current-limiting ? output transistor safe-area compensation ? floating operation for high-voltage applications description the LM317M is a 3-terminal adjustable positive voltage reg- ulator capable of supplying in excess of 500ma over an out- put voltage range of 1.2v to 37v. this voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. d-pak 1. adj 2. output 3. input 1 internal block diagram rlimit 3 vin vo 1 voltage reference vad j 2 protection circuitry + - input output LM317M 3-terminal 0.5a positive adjustable regulator
LM317M 2 absolute maximum ratings electrical characteristics (v i - v o = 5v, i o = 0.1a, 0 c t j +125 c, p dmax =7.5w, unless otherwise specified) ? load and line regulation are specified at constant junction temperature. change in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. parameter symbol value unit input-output voltage differential v i - v o 40 v power dissipation p d internally limited w operating temperature range t opr 0 ~ +125 c storage temperature range t stg -65 ~+125 c parameter symbol conditions min. typ. max. unit *line regulation 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 *load regulation rload t a =+ 25 c 10ma i o 0.5a v o 5v v o 5v - 5 0.1 25 0.5 mv %/ v o 10ma i o 0.5a v o 5v v o 5v -20 0.3 70 1.5 mv %/ v o adjustment pin current i adj - - 50 100 ua adjustment pin current change ? i adj 3v v i - v o 40v 10ma i o 0.5a p d < p dmax - 0.2 5 ua reference voltage v ref 3v < v i - v o < 40v 10ma i o 0.5a p d < p dmax 1.20 1.25 1.30 v temperature stability st t - - 0.7 %/ v o minimum load current to maintain regulation i l(min) v i - v o 40v - 3.5 10 ma maximum output current i o(max) v i - v o 15v p d < p dmax 0.5 0.9 - v i - v o 40v p d < p dmax , t a =+ 25 c 0.15 0.25 - a rms noise, % of v out e n t a = +25 c 10hz < f < 10khz - 0.003 - %/ v o ripple rejection rr v o = 10v, f = 120hz without c adj c adj = 10uf 66 65 80 - db long-term stability st t j =+ 125 c, 1000hours - 0.3 1 %/ 1000hrs
LM317M 3 typical application figure 1. 1 5v electronic shutdown regulator d1 protects the device during an input short circuit. figure 2. slow turn-on regulator figure 3. current regulator input output LM317M input output LM317M input output LM317M
LM317M 4 mechanical dimensions (continued) package 6.60 0.20 2.30 0.10 0.50 0.10 5.34 0.30 0.70 0.20 0.60 0.20 0.80 0.20 9.50 0.30 6.10 0.20 2.70 0.20 9.50 0.30 6.10 0.20 2.70 0.20 min0.55 0.76 0.10 0.50 0.10 1.02 0.20 2.30 0.20 6.60 0.20 0.76 0.10 (5.34) (1.50) (2xr0.25) (5.04) 0.89 0.10 (0.10) (3.05) (1.00) (0.90) (0.70) 0.91 0.10 2.30typ [2.30 0.20] 2.30typ [2.30 0.20] max0.96 (4.34) (0.50) (0.50) d-pak
LM317M 5 ordering information product number package operating temperature LM317Mdt d-pak 0 ~ 125 c
LM317M 7/12/00 0.0m 001 stock#dsxxxxxxxx ? 2000 fairchild semiconductor international 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 international. 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
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