View LM317L-D_3552175.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

100 ma adjustable output, positive voltage regulator the lm317l is an adjustable 3terminal 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 blowout 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. ? 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 safearea compensation ? floating operation for high voltage applications ? standard 3lead 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 m 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 m f + c o ** 1.0 m f v out 1.25v 1 r 2 r 1 i adj r 2 on semiconductor lm317l semiconductor technical data low current threeterminal adjustable positive voltage regulator ordering information z suffix plastic package case 29 pin 1. adjust 2. v out 3. v in 3 1 2 d suffix plastic package case 751 (sop8*) 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. *sop8 is an internally modified so8 package. pins 2, 3, 6 and 7 are electrically common to the die attach flag. this internal lead frame modifi- cation decreases package thermal resistance and increases power dissipation capability when appropriately mounted on a printed circuit board. sop8 conforms to all external dimen- sions of the standard so8 package. operating temperature range device package lm317ld lm317lz lm317lbz sop8 plastic plastic t j = 40 to +125 c t j = 0 to +125 c lm317lbd sop8 ? semiconductor components industries, llc, 2002 january, 2002 rev. 3 1 publication order number: lm317l/d
lm317l http://onsemi.com 2 maximum ratings rating symbol value unit inputoutput voltage differential v i v o 40 vdc power dissipation p d internally limited w operating junction temperature range t j 40 to +125 c storage temperature range t stg 65 to +150 c 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 m 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 d i adj 0.2 5.0 m 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 0.003 % v o ripple rejection (note 4) v o = 1.2 v, f = 120 hz c adj = 10 m 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. thermal resistance, junctiontocase z package r q jc 83 c/w thermal resistance, junctiontoair z package r q ja 160 c/w notes: 1. t low to t high = 0 to +125 c for lm317l 40 to +125 c for lm317lb 2. i max = 100 ma p max = 625 mw 3. 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. 4. c adj , when used, is connected between the adjustment pin and ground. 5. since longterm 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 3 representative schematic diagram 18k 6.8v 6.8v 350 300 300 300 3.0k 30 0 70 200 k 2.5 60 5 0 130 8.67k 500 40 0 2.4k 12.8k v out 5.1k 6.3v 2.0k 6.0k adjust v in 180 180 10 pf 10 pf *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 m f c o 240 1% r 1 adjust r2 1 % c in 0.1 m f lm317l i adj figure 1. line regulation and d i ad j /line test circuit v ol
lm317l http://onsemi.com 4 *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 m f adjust r 2 1% c o 1.0 m 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 d 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 m 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 m f figure 3. standard test circuit lm317l v in v out v out = 1.25 v r l c in 0.1 m f adjust r 1 240 1% d 1 * 1n4002 c o + 1 m f 14.30v 4.30v r 2 1.65k 1% ** 10 m 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
lm317l http://onsemi.com 5 i b , quiescent current (ma) 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 figure 9. minimum operating current figure 10. ripple rejection versus frequency 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 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
lm317l http://onsemi.com 6 v out , output voltage d deviation (v) v out , output voltage d deviation (v) v in , input voltage d change (v) noise voltage ( v) m v out , output voltage change (%) d i adj , adjustment pin current ( a) m c l = 0.3 m f; c adj = 10 m f figure 11. temperature stability figure 12. adjustment pin current figure 13. line regulation figure 14. output noise 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 ( m s) c l = 1 m 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 ( m s) i current (ma) l , load c l = 1 m f; c adj = 10 m f v in = 15 v v out = 10 v i nl = 50 ma t j = 25 c i l -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 -0.3
lm317l http://onsemi.com 7 applications information basic circuit operation the lm317l is a 3terminal 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 m 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 m f disc or 1.0 m 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 m 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 m f tantalum or 25 m f aluminum electrolytic capacitor on the output swamps this effect and insures stability. 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 m f, c adj > 5.0 m 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
lm317l http://onsemi.com 8 figure 19. adjustable current limiter figure 20. 5 v electronic shutdown regulator figure 21. slow turnon 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 m 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 m 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 9 package dimensions z suffix plastic package case 2911 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 xx 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 d suffix plastic package case 75107 (sop8) issue w 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. 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
lm317l http://onsemi.com 10 notes
lm317l http://onsemi.com 11 notes
lm317l http://onsemi.com 12 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any 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 without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications 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, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed 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. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. lm317l/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada

▲Up To Search▲

Price & Availability of LM317L-D

	To Download LM317L-D Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .