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? semiconductor components industries, llc, 2004 november, 2004 ? rev. 7 1 publication order number: lm317l/d lm317l 100 ma adjustable output, positive voltage regulator the lm317l is an adjustable 3?terminal positive voltage regulator capable of supplying in excess of 100 ma over an output voltage range of 1.2 v to 37 v. this voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. further, it employs internal current limiting, thermal shutdown and safe area compensation, making them essentially blow?out proof. the lm317l serves a wide variety of applications including local, on card regulation. this device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the lm317l can be used as a precision current regulator. features ? pb?free packages are available ? output current in excess of 100 ma ? output adjustable between 1.2 v and 37 v ? internal thermal overload protection ? internal short circuit current limiting ? output transistor safe?area compensation ? floating operation for high voltage applications ? standard 3?lead transistor package ? eliminates stocking many fixed voltages simplified application * c in is required if regulator is located an appreciable ** 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. lm317l v in v out r 1 240 r 2 adjust i adj c in * 0.1 f + c o ** 1.0 f v out 1.25 v 1 r 2 r 1 i adj r 2 ordering information see detailed ordering and shipping information in the package dimensions section on page 4 of this data sheet. low current three?terminal adjustable positive voltage regulator to?92 z suffix case 29 pin 1. adjust 2. v out 3. v in 3 1 2 soic?8 d suffix case 751 1 8 pin 1. v in 2. v out 3. v out 4. adjust 5. n.c. 6. v out 7. v out 8. n.c. http://onsemi.com
lm317l http://onsemi.com 2 maximum ratings rating symbol value unit input?output voltage differential v i ?v o 40 vdc power dissipation case 29 (to?92) t a = 25 c thermal resistance, junction?to?ambient thermal resistance, junction?to?case case 751 (soic?8) (note 1) t a = 25 c thermal resistance, junction?to?ambient thermal resistance, junction?to?case p d r ja r jc p d r ja r jc internally limited 160 83 internally limited 180 45 w c/w c/w w c/w c/w operating junction temperature range t j ?40 to +125 c storage temperature range t stg ?65 to +150 c maximum ratings are those values beyond which device damage can occur. maximum ratings applied to the device are individual str ess limit values (not normal operating conditions) and are not valid simultaneously. if these limits are exceeded, device functional operation i s not implied, damage may occur and reliability may be affected. 1. soic?8 junction?to?ambient thermal resistance is for minimum recommended pad size. refer to figure 23 for thermal resistance variation versus pad size.
lm317l http://onsemi.com 3 electrical characteristics (v i ?v o = 5.0 v; i o = 40 ma; t j = t low to t high (note 1); i max and p max (note 2); unless otherwise noted.) lm317l, lb characteristics figure symbol min typ max unit line regulation (note 3) t a = 25 c, 3.0 v v i ? v o 40 v 1 reg line ? 0.01 0.04 %/v load regulation (note 3), t a = 25 c 10 ma i o i max ? lm317l v o 5.0 v v o 5.0 v 2 reg load ? ? 5.0 0.1 25 0.5 mv % v o adjustment pin current 3 i adj ? 50 100 a adjustment pin current change 2.5 v v i ? v o 40 v, p d p max 10 ma i o i max ? lm317l 1, 2 i adj ? 0.2 5.0 a reference voltage 3.0 v v i ? v o 40 v, p d p max 10 ma i o i max ? lm317l 3 v ref 1.20 1.25 1.30 v line regulation (note 3), 3.0 v v i ? v o 40 v 1 reg line ? 0.02 0.07 %/v load regulation (note 3) 10 ma i o i max ? lm317l v o 5.0 v v o 5.0 v 2 reg load ? ? 20 0.3 70 1.5 mv % v o temperature stability (t low t j t high ) 3 t s ? 0.7 ? % v o minimum load current to maintain regulation (v i ? v o = 40 v) 3 i lmin ? 3.5 10 ma maximum output current v i ? v o 6.25 v, p d p max , z package v i ? v o 40 v, p d p max , t a = 25 c, z package 3 i max 100 ? 200 20 ? ? ma rms noise, % of v o t a = 25 c, 10 hz f 10 khz n ? 0.00 3 ? % v o ripple rejection (note 4) v o = 1.2 v, f = 120 hz c adj = 10 f, v o = 10.0 v 4 rr 60 ? 80 80 ? ? db long term stability, t j = t high (note 5) t a = 25 c for endpoint measurements 3 s ? 0.3 1.0 %/1.0 k hrs. 2. t low to t high = 0 to +125 c for lm317l ?40 to +125 c for lm317lb 3. i max = 100 ma p max = 625 mw 4. load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. 5. c adj , when used, is connected between the adjustment pin and ground. 6. since long?term stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot.
lm317l http://onsemi.com 4 ordering information device operating temperature range package shipping 2 lm317lbd soic?8 98 units / rail lm317lbdg soic?8 (pb?free) 98 units / rail lm317lbdr2 soic?8 2500/tape & reel lm317lbdr2g soic?8 (pb?free) 2500/tape & reel lm317lbz t =40 c to +125 c to?92 2000 units / bag lm317lbzg t j = ?40 c to +125 c to?92 (pb?free) 2000 units / bag lm317lbzra to?92 2000 tape & reel lm317lbzrag to?92 (pb?free) 2000 tape & reel lm317lbzrp to?92 2000 ammo pack lm317lbzrpg to?92 (pb?free) 2000 ammo pack lm317ld soic?8 98 units / rail lm317ldg soic?8 (pb?free) 98 units / rail lm317ldr2 soic?8 2500/tape & reel lm317ldr2g soic?8 (pb?free) 2500/tape & reel lm317lz to?92 2000 units / bag LM317LZG t =0 c to +125 c to?92 (pb?free) 2000 units / bag lm317lzra t j = 0 c to +125 c to?92 2000 tape & reel lm317lzrag to?92 (pb?free) 2000 tape & reel lm317lzre to?92 2000 tape & reel lm317lzrm to?92 2000 ammo pack lm317lzrp to?92 2000 ammo pack lm317lzrpg to?92 (pb?free) 2000 ammo pack 2for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. representative schematic diagram 18k 6.8v 6.8v 350 300 300 300 3.0k 300 70 200k 2.5 60 50 130 8.67k 500 400 2.4k 12.8k v out 5.1k 6.3v 2.0k 6.0k adjust v in 180 180 10 p f 10 p f
lm317l http://onsemi.com 5 *pulse testing required: 1% duty cycle is suggested. line regulation (%/v) = v oh - v ol x 100 * v cc v ih v il v in v out v oh v ol r l + 1 f c o 240 1% r 1 adjust r2 1 % c in 0.1 f lm317l i adj figure 1. line regulation and i ad j /line test circuit v ol *pulse testing required: 1% duty cycle is suggested. load regulation (mv) = v o (min load) -v o (max load) load regulation (% v o ) = v o (min load) - v o (max load) x 100 v o (min load) v o (max load) lm317l c in 0.1 f adjust r 2 1% c o 1.0 f + * r l (max load) r l (min load) v out r 1 240 1% v in *v in i adj i l figure 2. load regulation and i ad j / load test circuit v o (min load) pulse testing required: 1% duty cycle is suggested. lm317l v in v out adjust r 1 240 1% + 1 f c o r l c in r 2 1% to calculate r 2 : v out = i set r 2 + 1.250 v assume i set = 5.25 ma i l i adj i set v ref v o v i 0.1 f figure 3. standard test circuit
lm317l http://onsemi.com 6 lm317l v in v out v out = 1.25 v r l c in 0.1 f adjust r 1 240 1% d 1 * 1n4002 c o + 1 f 14.30v 4.30v r 2 1.65k 1% ** 10 f + *d 1 discharges c adj if output is shorted to ground. f = 120 hz v o **c adj provides an ac ground to the adjust pin. figure 4. ripple rejection test circuit v in -v out , input-output voltage differential (v) i o , output current (a) figure 5. load regulation figure 6. ripple rejection figure 7. current limit figure 8. dropout voltage 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -50 -25 0 25 50 75 100 125 150 d v out t j , junction temperature ( c) , output voltage change (%) v in = 45 v v out = 5.0 v i l = 5.0 ma to 40 ma v in = 10 v v out = 5.0 v i l = 5.0 ma to 100 ma 80 70 60 50 rr, ripple rejection (db) -50 -25 0 25 50 75 100 125 150 t j , junction temperature ( c) i l = 40 ma f = 120 hz v out = 10 v v in = 14 v to 24 v -50 -25 0 25 50 75 100 125 150 t j , junction temperature ( c) 2.5 2.0 1.5 1.0 0.5 i l = 5.0 ma i l = 100 ma 0.50 0.40 0.30 0.20 0.10 0 0 1020304050 v in -v out , input-output voltage differential (v) t j = 25 c t j = 150 c
lm317l http://onsemi.com 7 i b , quiescent current (ma) figure 9. minimum operating current figure 10. ripple rejection versus frequency 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 010203040 v in -v out , input-output voltage differential (v) t j = 55 c t j = 25 c t j = 150 c 100 90 80 70 60 50 40 30 20 10 10 100 1.0 k 10 k 100 k 1.0 m f, frequency (hz) rr, ripple rejection (db) i l = 40 ma v in = 5.0 v 1.0 v pp v out = 1.25 v noise voltage ( v) m v out , output voltage change (%) d i adj , adjustment pin current ( a) m figure 11. temperature stability figure 12. adjustment pin current figure 13. line regulation figure 14. output noise -50 -25 0 25 50 75 100 125 150 t j , junction temperature ( c) 1.260 1.250 1.240 1.230 1.220 ref v , reference voltage (v) v in = 4.2 v v out = v ref i l = 5.0 ma -50 -25 0 25 50 75 100 125 150 t j , junction temperature ( c) 80 70 65 60 55 50 45 40 35 v in = 6.25 v v out = v ref i l = 10 ma i l = 100 ma -50 -25 0 25 50 75 100 125 150 t j , junction temperature ( c) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 v in = 4.25 v to 41.25 v v out = v ref i l = 5 ma -50 -25 0 25 50 75 100 125 150 t j , junction temperature ( c) 10 8.0 6.0 4.0 bandwidth 100 hz to 10 khz
lm317l http://onsemi.com 8 v out , output voltage d deviation (v) v out , output voltage d deviation (v) v in , input voltage d change (v) c l = 0.3 f; c adj = 10 f figure 15. line transient response figure 16. load transient response 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 1.0 0.5 0 0 10203040 t, time ( s) c l = 1 f c l = 0 v in v out = 1.25 v i l = 20 ma t j = 25 c 0.3 0.2 0.1 0 -0.1 -0.2 100 50 0 010203040 t, time ( s) i current (ma) l , load c l = 1 f; c adj = 10 f v in = 15 v v out = 10 v i nl = 50 ma t j = 25 c i l -0.3 applications information basic circuit operation the lm317l is a 3?terminal floating regulator. in operation, the lm317l develops and maintains a nominal 1.25 v reference (v ref ) between its output and adjustment terminals. this reference voltage is converted to a programming current (i prog ) by r 1 (see figure 13), and this constant current flows through r 2 to ground. the regulated output voltage is given by: v out = v ref (1 + ) + i adj r 2 r 2 r 1 since the current from the adjustment terminal (i adj ) represents an error term in the equation, the lm317l was designed to control i adj to less than 100 a and keep it constant. to do this, all quiescent operating current is returned to the output terminal. this imposes the requirement for a minimum load current. if the load current is less than this minimum, the output voltage will rise. since the lm317l is a floating regulator, it is only the voltage differential across the circuit which is important to performance, and operation at high voltages with respect to ground is possible. + v ref adjust v in v out lm317l r 1 i prog v out r 2 i adj v ref = 1.25 v typical figure 17. basic circuit configuration load regulation the lm317l is capable of providing extremely good load regulation, but a few precautions are needed to obtain maximum performance. for best performance, the programming resistor (r1) should be connected as close to the regulator as possible to minimize line drops which effectively appear in series with the reference, thereby degrading regulation. the ground end of r2 can be returned near the load ground to provide remote ground sensing and improve load regulation. external capacitors a 0.1 f disc or 1.0 f tantalum input bypass capacitor (c in ) is recommended to reduce the sensitivity to input line impedance. the adjustment terminal may be bypassed to ground to improve ripple rejection. this capacitor (c adj ) prevents ripple from being amplified as the output voltage is increased. a 10 f capacitor should improve ripple rejection about 15 db at 120 hz in a 10 v application. although the lm317l is stable with no output capacitance, like any feedback circuit, certain values of external capacitance can cause excessive ringing. an output capacitance (c o ) in the form of a 1.0 f tantalum or 25 f aluminum electrolytic capacitor on the output swamps this effect and insures stability.
lm317l http://onsemi.com 9 protection diodes when external capacitors are used with any ic regulator it is sometimes necessary to add protection diodes to prevent the capacitors from discharging through low current points into the regulator. figure 14 shows the lm317l with the recommended protection diodes for output voltages in excess of 25 v or high capacitance values (c o > 10 f, c adj > 5.0 f). diode d 1 prevents c o from discharging thru the ic during an input short circuit. diode d 2 protects against capacitor c adj discharging through the ic during an output short circuit. the combination of diodes d 1 and d 2 prevents c adj from discharging through the ic during an input short circuit. d 1 v in c in 1n4002 lm317l v out r 1 + c o d 2 r 2 c adj 1n4002 adjust figure 18. voltage regulator with protection diodes figure 19. adjustable current limiter figure 20. 5.0 v electronic shutdown regulator figure 21. slow turn?on regulator figure 22. current regulator v ref +25v v in lm317l v out r 1 v o 1.25k adjust i o d2 1n914 1n5314 r 2 500 * to provide current limiting of i o to the system ground, the source of the current limiting diode must be tied to a negative voltage below - 7.25 v. r 2 v ref r 1 = v ss * d1 1n914 v o < p ov + 1.25 v + v ss i lmin - i p < i o < 100 ma - i p as shown o < i o < 95 ma + 10 f v in v out 240 1n4002 lm317l adjust mps2907 r 2 50k v in d 1 1n4002 v out 120 adjust 720 + 1.0 f mps2222 1.0k ttl control lm317l minimum v out = 1.25 v d 1 protects the device during an input short circuit. lm317l v in r 1 r 2 adjust i adj i out i outmax = v ref + i adj 5.0 ma < i out < 100 ma v out 1.25 v i outmax = v ref + i adj 1.25 v i dss i omax + i dss r 1 r 1 + r 2 r 1 r 1 + r 2
lm317l http://onsemi.com 10 30 50 70 90 110 130 150 0.4 0.8 1.2 1.6 2.0 2.4 2.8 0203050 40 10 l, length of copper (mm) 170 3.2 r q ja p d r , thermal resistance ja q junction-to-air ( c/w) , maximum power dissipation (w) ??? ??? ??? ??? ??? ??? ??? ??? 2.0 oz. copper graph represents symmetrical layout 3.0 mm l l figure 23. sop?8 thermal resistance and maximum power dissipation versus p.c.b. copper length p d(max) for t a = 50 c
lm317l http://onsemi.com 11 package dimensions to?92 z suffix case 29?11 issue al notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. contour of package beyond dimension r is uncontrolled. 4. lead dimension is uncontrolled in p and beyond dimension k minimum. r a p j l b k g h section x?x c v d n n xx seating plane dim min max min max millimeters inches a 0.175 0.205 4.45 5.20 b 0.170 0.210 4.32 5.33 c 0.125 0.165 3.18 4.19 d 0.016 0.021 0.407 0.533 g 0.045 0.055 1.15 1.39 h 0.095 0.105 2.42 2.66 j 0.015 0.020 0.39 0.50 k 0.500 --- 12.70 --- l 0.250 --- 6.35 --- n 0.080 0.105 2.04 2.66 p --- 0.100 --- 2.54 r 0.115 --- 2.93 --- v 0.135 --- 3.43 --- 1
lm317l http://onsemi.com 12 package dimensions soic?8 d suffix case 751?07 issue ac 1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155 mm inches scale 6:1 *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. 6. 751?01 thru 751?06 are obsolete. new standard is 751?07. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 ?x? ?y? g m y m 0.25 (0.010) ?z? y m 0.25 (0.010) z s x s m on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800?282?9855 toll free usa/canada japan : on semiconductor, japan customer focus center 2?9?1 kamimeguro, meguro?ku, tokyo, japan 153?0051 phone : 81?3?5773?3850 lm317l/d literature fulfillment : literature distribution center for on semiconductor p.o. box 61312, phoenix, arizona 85082?1312 usa phone : 480?829?7710 or 800?344?3860 toll free usa/canada fax : 480?829?7709 or 800?344?3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : http://onsemi.com order literature : http://www.onsemi.com/litorder for additional information, please contact your local sales representative.

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