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1/14 february 2003 n output voltage range: 1.2 to 37v n output current in excess of 1.5a n 0.1% line and load regulation n floating operation for high voltages n complete series of protections: current limiting, thermal shutdown and soa control description the lm117/lm217/lm317 are monolithic integrated circuit in to-220, to-220fp, to-3 and d 2 pak packages intended for use as positive adjustable voltage regulators. they are designed to supply more than 1.5a of load current with an output voltage adjustable over a 1.2 to 37v range. the nominal output voltage is selected by means of only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators. lm117/217 lm317 1.2v to 37v voltage regulator schematic diagram to-220 d 2 pak to-220fp to-3
lm117/217/317 2/14 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. thermal data connection diagram (top view) ordering codes symbol parameter2 value unit v i-o input-output differential voltage 40 v i o output current internally limited t op operating junction temperature for: lm117 -55 to 150 c lm217 -25 to 150 lm317 0 to 125 p tot power dissipation internally limited t stg storage temperature -65 to 150 c symbol parameter d 2 pak to-220 to-220fp to-3 unit r thj-case thermal resistance junction-case max 3354c/w r thj-amb thermal resistance junction-ambient max 62.5 50 60 35 c/w type to-220 d 2 pak to-220fp to-3 lm117 lm117k lm217 lm217t lm217d2t lm217k lm317 lm317t lm317d2t lm317p LM317K to-220 to-220fp to-3 d 2 pak
lm117/217/317 3/14 basic adjustable regulator electrical characteristics for lm117/lm217 (v i -v o =5v,i o = 500 ma, i max =1.5aand p max =20w,t j = -55 to 150c for lm117, t j = -25 to 150c for lm217, unless otherwise specified). (*) cadj is connected between pin 1 and ground. symbol parameter test conditions min. typ. max. unit d v o line regulation v i -v o = 3 to 40 v t j = 25c 0.01 0.02 %/v 0.02 0.05 d v o load regulation v o 5v i o =10matoi max t j = 25c 5 15 mv 20 50 v o 3 5v i o =10matoi max t j = 25c 0.1 0.3 % 0.3 1 i adj adjustment pin current 50 100 a d i adj adjustment pin current v i -v o = 2.5 to 40 v i o =10matoi max 0.2 5 a v ref reference voltage (between pin 3 and pin 1) v i -v o = 2.5 to 40 v i o =10matoi max p d p max 1.2 1.25 1.3 v d v o /v o output voltage temperature stability 1% i o(min) minimum load current v i -v o =40v 3.55ma i o(max) maximum load current v i -v o 15 v p d < p max 1.5 2.2 a v i -v o =40v p d < p max t j = 25c 0.4 en output noise voltage (percentage of v o ) b = 10hz to 100khz t j = 25c 0.003 % svr supply voltage rejection (*) t j = 25c f = 120hz c adj =0 65 db c adj =10f 66 80
lm117/217/317 4/14 electrical characteristics for lm317 (v i -v o =5v,i o =500ma,i max = 1.5 a and p max =20w,t j = 0 to 125c, unless otherwise specified). (*) cadj is connected between pin 1 and ground. figure 1 : output current vs input-output differential voltage figure 2 : dropout voltage vs junction temperature symbol parameter test conditions min. typ. max. unit d v o line regulation v i -v o = 3 to 40 v t j = 25c 0.01 0.04 %/v 0.02 0.07 d v o load regulation v o 5v i o =10matoi max t j = 25c 5 25 mv 20 70 v o 3 5v i o =10matoi max t j = 25c 0.1 0.5 % 0.3 1.5 i adj adjustment pin current 50 100 a d i adj adjustment pin current v i -v o = 2.5 to 40 v i o =10matoi max 0.2 5 a v ref reference voltage (between pin 3 and pin 1) v i -v o = 2.5 to 40 v i o =10matoi max p d p max 1.2 1.25 1.3 v d v o /v o output voltage temperature stability 1% i o(min) minimum load current v i -v o = 40 v 3.5 10 ma i o(max) maximum load current v i -v o 15 v p d < p max 1.5 2.2 a v i -v o =40v p d < p max t j = 25c 0.4 en output noise voltage (percentage of v o ) b = 10hz to 100khz t j = 25c 0.003 % svr supply voltage rejection (*) t j = 25c f = 120hz c adj =0 65 db c adj =10f 66 80
lm117/217/317 5/14 figure 3 : reference voltage vs junction figure 4 : basic adjustable regulator application information the lm117/217/317 provides an internal reference voltage of 1.25v between the output and adjustments terminals. this is used to set a constant current flow across an external resistor divider (see fig. 4), giving an output voltage v o of: v o =v ref (1 + r 2 /r 1 )+i adj r 2 the device was designed to minimize the term i adj (100a max) and to maintain it very constant with line and load changes. usually, the error term i adj r 2 can be neglected. to obtain the previous requirement, all the regulator quiescent current is returned to the output terminal, imposing a minimum load current condition. if the load is insufficient, the output voltage will rise. since the lm117/217317 is a floating regulator and "sees" only the input-to-output differential voltage, supplies of very high voltage with respect to ground can be regulated as long as the maximum input-to-output differential is not exceeded. furthermore, programmable regulator are easily obtainable and, by connecting a fixed resistor between the adjustment and output, the device can be used as a precision current regulator. in order to optimize the load regulation, the current set resistor r 1 (see fig. 4) should be tied as close as possible to the regulator, while the ground terminal of r 2 should be near the ground of the load to provide remote ground sensing. performance may be improved with added capacitance as follow: an input bypass capacitor of 0.1f an adjustment terminal to ground 10f capacitor to improve the ripple rejection of about 15 db (c adj ). an 1f tantalum (or 25faluminium electrolytic) capacitor on the output to improve transient response. in additional to external capacitors, it is good practice to add protection diodes, as shown in fig.5. d1 protect the device against input short circuit, while d2 protect against output short circuit for capacitance discharging.
lm117/217/317 6/14 table 5 : voltage regulator with protection diodes d1 protect the device against input short circuit, while d2 protects against output short circuit for capacitors discharging. figure 6 : slow turn-on 15v regulator figure 7 : current regulator v ref i o = ?? +i adj ? r 1 1.25v ??? r 1
lm117/217/317 7/14 figure 8 : 5v electronic shut-down regulator figure 9 : digitally selected outputs (r 2 sets maximum v o ) figure 10 : battery charger (12v) *r s sets output impedance of charger z o =r s (1 + r 2 /r 1 ). use of r s allows low charging rates whit fully charged battery.
lm117/217/317 8/14 figure 11 : current limited 6v charger *r 3 sets peak current (0.6a for 1 0). ** c 1 recommended to filter out input transients
lm117/217/317 9/14 dim. mm. inch min. typ max. min. typ. max. a 11.85 0.466 b 0.96 1.05 1.10 0.037 0.041 0.043 c 1.70 0.066 d 8.7 0.342 e 20.0 0.787 g 10.9 0.429 n 16.9 0.665 p 26.2 1.031 r 3.88 4.09 0.152 0.161 u 39.5 1.555 v 30.10 1.185 to-3 mechanical data p003c/c e b r c d a p g n v u o
lm117/217/317 10/14 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 c 1.23 1.32 0.048 0.051 d 2.40 2.72 0.094 0.107 d1 1.27 0.050 e 0.49 0.70 0.019 0.027 f 0.61 0.88 0.024 0.034 f1 1.14 1.70 0.044 0.067 f2 1.14 1.70 0.044 0.067 g 4.95 5.15 0.194 0.203 g1 2.4 2.7 0.094 0.106 h2 10.0 10.40 0.393 0.409 l2 16.4 0.645 l4 13.0 14.0 0.511 0.551 l5 2.65 2.95 0.104 0.116 l6 15.25 15.75 0.600 0.620 l7 6.2 6.6 0.244 0.260 l9 3.5 3.93 0.137 0.154 dia. 3.75 3.85 0.147 0.151 to-220 mechanical dat a p011c
lm117/217/317 11/14 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 b 2.5 2.7 0.098 0.106 d 2.5 2.75 0.098 0.108 e 0.45 0.70 0.017 0.027 f 0.75 1 0.030 0.039 f1 1.15 1.50 0.045 0.059 f2 1.15 1.50 0.045 0.059 g 4.95 5.2 0.194 0.204 g1 2.4 2.7 0.094 0.106 h 10.0 10.40 0.393 0.409 l2 16 0.630 l3 28.6 30.6 1.126 1.204 l4 9.8 10.6 0.385 0.417 l6 15.9 16.4 0.626 0.645 l7 9 9.3 0.354 0.366 dia. 3 3.2 0.118 0.126 to-220fp mechanical data l2 a b d e h g l6 f l3 g1 123 f2 f1 l7 l4 7012510/f
lm117/217/317 12/14 dim. mm. inch min. typ max. min. typ. max. a 4.4 4.6 0.173 0.181 a1 2.49 2.69 0.098 0.106 a2 0.03 0.23 0.001 0.009 b 0.7 0.93 0.027 0.036 b2 1.14 1.7 0.044 0.067 c 0.45 0.6 0.017 0.023 c2 1.23 1.36 0.048 0.053 d 8.95 9.35 0.352 0.368 d1 8 0.315 e 10 10.4 0.393 0.409 e1 8.5 0.335 g 4.88 5.28 0.192 0.208 l 15 15.85 0.590 0.624 l2 1.27 1.4 0.050 0.055 l3 1.4 1.75 0.055 0.068 m 2.4 3.2 0.094 0.126 r 0.4 0.016 v2 0? 8? 0? 8? d 2 pak mec hanical data p011p6g
lm117/217/317 13/14 dim. mm. inch min. typ max. min. typ. max. a 180 7.086 c 12.8 13.0 13.2 0.504 0.512 0.519 d 20.2 0.795 n 60 2.362 t 14.4 0.567 ao 10.50 10.6 10.70 0.413 0.417 0.421 bo 15.70 15.80 15.90 0.618 0.622 0.626 ko 4.80 4.90 5.00 0.189 0.193 0.197 po 3.9 4.0 4.1 0.153 0.157 0.161 p 11.9 12.0 12.1 0.468 0.472 0.476 tape & reel d 2 pak-p 2 pak-d 2 pak/a-p 2 pak/a mechanical data
lm117/217/317 14/14 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2003 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco singapore - spain - sweden - switzerland - united kingdom - united states. ? http://www.st.com

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