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may 2007 rev. 4 1/18 18 lm217l lm317l low current 1.2 to 37v adjustable voltage regulator features output voltage range: 1.2 to 37v output current in excess of 100 ma line regulation typ. 0.01% load regulation typ. 0.1% thermal overload protection short circuit protection output transition safe area compensation floating operation for high voltage applications description the lm217l/lm317l are monolithic integrated circuit in so-8 and to-92 packages intended for use as positive adjustable voltage regulators. they are designed to supply until 100 ma 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. so-8 to-92 www.st.com order codes part numbers packages so-8 (tape & reel) to-92 (bag) (1) 1. available in tape & reel with the suffi x "-tr" and in ammopak with the suffix "-ap ". please note that in these cases pins ar e shaped according to tape & reel specifications lm217l lm217ld13tr lm217lz lm317l lm317ld13tr lm317lz
lm217l/lm317l 2/18 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
lm217l/lm317l diagram 3/18 1 diagram figure 1. schematic diagram
pin configuration lm217l/lm317l 4/18 2 pin configuration figure 2. pin connections (top view for so-8, bottom view for to-92) to-92 so-8 pin 1 = adjust pin 2 = in pin 3 = out
lm217l/lm317l maximum ratings 5/18 3 maximum ratings table 1. absolute maximum ratings symbol parameter value unit v i -v o input-output differential voltage 40 v p d power dissipation internally limited mw t op operating junction temperature range for lm217l -40 to 125 c for lm317l 0 to 125 t stg storage temperature range -55 to 150 c figure 3. test circuit
electrical characteristics lm217l/lm317l 6/18 4 electrical characteristics table 2. electrical characteristics of lm217l (refer to the test circuits, t j = - 40 to 125c, v i - v o = 5 v, i o = 40 ma, unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o line regulation v i - v o = 3 to 40 v i l < 20 ma t j = 25c 0.01 0.02 %/v 0.02 0.05 v o load regulation v o 5 v i o = 5 to 100 ma t j = 25c 5 15 mv 20 50 v o 5 v i o = 5 to 100 ma t j = 25c 0.1 0.3 % 0.3 1 i adj adjustment pin current 50 100 a i adj adjustment pin current v i - v o = 3 to 40 v, i o = 5 to 100 ma p d < 625 mw 0.2 5 a v ref reference voltage v i - v o = 3 to 40 v, i o = 10 to 500 ma p d < 625 mw 1.2 1.25 1.3 v v o /v o output voltage temperature stability 0.7 % i o(min) minimum load current v i - v o = 40 v 3.5 5 ma i o(max) maximum output current v i - v o = 3 to 13 v 100 200 ma v i - v o = 40 v 50 en output noise voltage b = 10 hz to 10 khz, t j = 25c 0.003 % svr supply voltage rejection (1) 1. c adj is connected between adjust pin and ground. t j = 25c f = 120 hz c adj = 0 65 db c adj = 10 f 66 80
lm217l/lm317l electrical characteristics 7/18 table 3. electrical characteristics of lm317l (refer to the test circuits, t j = 0 to 125c, v i - v o = 5 v, i o = 40 ma, unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o line regulation v i - v o = 3 to 40 v i l < 20 ma t j = 25c 0.01 0.04 %/v 0.02 0.07 v o load regulation v o 5 v i o = 5 to 100 ma t j = 25c 5 25 mv 20 70 v o 5 v i o = 5 to 100 ma t j = 25c 0.1 0.5 % 0.3 1.5 i adj adjustment pin current 50 100 a i adj adjustment pin current v i - v o = 3 to 40 v, i o = 5 to 100 ma p d < 625 mw 0.2 5 a v ref reference voltage v i - v o = 3 to 40 v, i o = 5 to 100 ma p d < 625 mw 1.2 1.25 1.3 v v o /v o output voltage temperature stability 0.7 % i o(min) minimum load current v i - v o = 40 v 3.5 5 ma i o(max) maximum output current v i - v o = 3 to 13 v 100 200 ma v i - v o = 40 v 50 en output noise voltage b = 10 hz to 10 khz, t j = 25c 0.003 % svr supply voltage rejection (1) t j = 25c f = 120 hz c adj = 0 65 db c adj = 10 f 66 80 1. c adj is connected between adjust pin and ground.
typical performance lm217l/lm317l 8/18 5 typical performance figure 4. current limit figure 5. minimum operating current
lm217l/lm317l application information 9/18 6 application information the lm317l provides an internal reference voltage of 1.25v between the output and adjustments terminals. this is used to set a cons tant current flow across an external resistor divider (see figure 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 chan ges. 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 condit ion. if the load is in sufficient, the output voltage will rise. since the lm317l 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 figure 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.
application circuits lm217l/lm317l 10/18 7 application circuits figure 6. basic adjustable regulator figure 7. voltage regulator with protection diodes figure 8. slow turn-on 15v regulator
lm217l/lm317l application circuits 11/18 figure 9. current regulator i o =v ref /r 1 + i adj = 1.25v/r 1 figure 10. 5v electronic shut-down regulator figure 11. digitally selected outputs (r 2 = sets maximum v o )
package mechanical data lm217l/lm317l 12/18 8 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com.
lm217l/lm317l package mechanical data 13/18 dim. mm. inch min. typ max. min. typ. max. a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.04 0.010 a2 1.10 1.65 0.043 0.065 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.007 0.010 d 4.80 5.00 0.189 0.197 e 3.80 4.00 0.150 0.157 e 1.27 0.050 h 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 l 0.40 1.27 0.016 0.050 k ? (max.) ddd 0.1 0.04 so-8 mechanical data 0016023/c 8
package mechanical data lm217l/lm317l 14/18 dim. mm. mils min. typ max. min. typ. max. a 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 d 4.45 4.95 175.2 194.9 e 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 l 12.7 15.49 500.0 609.8 r 2.16 2.41 85.0 94.9 s1 0.92 1.52 36.2 59.8 w 0.41 0.56 16.1 22.0 5 5 to-92 mechanical data 0102782/d
lm217l/lm317l package mechanical data 15/18 dim. mm. inch min. typ max. min. typ. max. a 330 12.992 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 60 2.362 t 22.4 0.882 ao 8.1 8.5 0.319 0.335 bo 5.5 5.9 0.216 0.232 ko 2.1 2.3 0.082 0.090 po 3.9 4.1 0.153 0.161 p 7.9 8.1 0.311 0.319 tape & reel so-8 mechanical data
package mechanical data lm217l/lm317l 16/18 dim. mm. inch min. typ max. min. typ. max. a1 4.80 0.189 t 3.80 0.150 t1 1.60 0.063 t2 2.30 0.091 d 0.48 0.019 p0 12.5 12.9 0.492 0.508 p2 5.65 7.05 0.222 0.278 f1, f2 2.44 2.54 2.94 0.096 0.100 0.116 delta h 2 0.079 w 17.5 18.00 19.0 0.689 0.709 0.748 w0 5.7 6.3 0.224 0.248 w1 8.5 9.25 0.335 0.364 w2 0.50 0.20 h 18.50 18.70 0.728 0.726 h0 15.50 16.50 0.610 0.650 h1 25.00 0.984 d0 3.8 4.2 0.150 0.165 t 0.90 0.035 l1 3 0.118 delta p 1 0.039 u 50 1.968 1 360 14.173 2 30 1.181 tape & reel for to-92 mechanical data 1 2 u pull-out direction w w1 w0 w2 a1 d d0 h1 h h0 l l1 f1 f2 p2 p0 delta p delta h t2 t1 t t drawing not in scale
lm217l/lm317l revision history 17/18 9 revision history table 4. revision history date revision changes 16-mar-2005 2 add tape & reel for to-92. 23-dec-2005 3 mistake on ordering table in header. 18-may-2007 4 order codes has been updated and the document has been reformatted.
lm217l/lm317l 18/18 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2007 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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