TS317 3-terminal adjustable output positive voltage regulator output voltage range from 1.25v to 37v output current up to 1.5a general description t he t s 317 is adjustable 3-terminal posit ive voltage regulator capabl e of supply i ng in excess of 1.5a over an output voltage range of 1.25 v to 37 v. t h is volt age regulator is exceptionally easy to us e and require only tw o external resistors to set the output voltage. f u rt her, it employ s internal curr ent limiting, therma l shutdow n and safe area compensation, making it essentially blow -out proof. t he t s 317 is offered in 3-pin t o - 220, t o -263, t o -252 and sot - 223 package. features output current up to 1.5a * t o -220/t o -263 for 1.5a * t o -252/sot - 223 for 500ma output adjustable betw een 1.25 v and 37 v internal t hermal overload protection internal short-circuit current limiting constant w i th t e mperature output t r ansistor safe-area compensation f l oating operation for hi gh voltage applications eliminates stocking many f i xed voltages output voltage offered in 4% tolerance ordering information part no. operating temp. package t s 317cz t o - 2 2 0 t s 3 1 7 c m t o - 2 6 3 t s 3 1 7 c p t o - 2 5 2 t s 317cw -20 ~ + 150 o c sot - 223 standard application vout = 1.25 v * (1 + r2 / r1 ) + iadj j * r2 since i adj is controlled to less than 100 a, the error associated w i th this term is negligible in most applications a common ground is required betw een the input and the output voltages. t he input volt age must remain ty pically 2.0v above the output voltage even during the low point on the input ripple voltage. * = cin is required if regulat or is located an appreciable distance from pow er supply filter. ** = co is not needed for stability ; how ever, it does improve transient response. to-263 pin assignment: 1. adjustable 2. output 3. input (heatsink surface connected to pin 2) TS317 1-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
absolute maximum rating input voltage vin 40 v pow e r dissipation pd internal limited w operating junction t e mperature range t j -20 ~ + 150 o c storage t e mperature range t st g -65 ~ + 150 o c electrical characteristics (v i -v o = 5.0 v, io= 500ma for t o -220/t o -263 pa ckages, io= 200ma for t o -252/sot - 223 package; tj = t low to t high see [note 1]; pmax per [note 2]; unless otherw i se specified.) cha ra c t e r i s t i c f i g u r e symbol m i n . t y p . ma x . u n i t reference voltage (note 4) pd pmax , 10ma io imax, 3.0 v vi - vo 40 v 3 vref 1.20 1.25 1.30 v line regulation (note 3) ta = 2 5 o c, 3.0 v vi -vo 40 v 1 regline -- 0.01 0.07 %/v load regulation (note 3) ta = 2 5 o c, 10ma i o imax , v o 5 . 0 v o 5.0 2 r e g l o a d -- -- 5.0 0.1 25 0.5 mv %v t hermal regulation ta = 2 5 o c, 20 ms pulse -- 0.03 0.07 %vo/w adjustment pin current 3 iadj -- 50 100 ua adjustment pin current change, pd pmax , 10ma io imax, 2.5v v i - v o 40v 1.2 ? iadj - - 0 . 2 5 . 0 u a maximum output current pd pmax , (vin-vout) 15v cz , cm package cp, cw package imax 1.5 0.5 a t e mperature stability (t low tj t high ) 3 t s - - 1 - - % minimum load current to maintain regulation (v i - v o = 40 v) 3 i m i n - - 3 . 5 1 0 m a rms noise, % of v o, ta = 2 5 o c, 10h z f 10kh z - - n - - 0 . 0 0 3 - - % long-term stability (note 5), t j = t high ta = 2 5 o c for endpoint measurements ,1000hrs 3 s - - 0 . 3 1 . 0 % notes: 1. t low = -2 0 o c, t high = + 1 5 0 o c 2. pmax: cz package= 20w , cm package= 3w , cp package= 1.5w , cw package= 0.8w , 3. load and line regulation are s pecified at constant juncti on temperature. changes in v o due to heating effects must be taken into account separately . pulse testing w i th low duty cy cle is used. 4. selected devices w i th tightened tole rance reference voltage available. 5. since long-t e rm stability cannot be m easured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot. 6. cadj, w hen used, is connected betw een the adjustment pin and ground. TS317 2-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
block diagram test circuit figure 1. line regulation and ? iadj/line test circuit TS317 3-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
test circuit figure 2. load regulation and ? iadj/line test circuit figure 3. standard test circuit figure 4. ripple rejection test circuit TS317 4-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
application information basic circuit operation t he t s 317 is a 3-terminal floating regulator. in operation, the t s 317 develops and maintains a nominal 1.25v reference (v ref) betw een its output and adjustment terminals. t h is reference voltage is converted to a programmi ng current (iprog.) by r 1 (see f i gure 17), and this constant current flow s through r 2 to ground. t he regulated out put voltage is given by : vout = vref ( 1 + r2 / r1 ) + iadj * r2 since the current from t he adjustment terminal (iadj) represents an error term in the equation, the t s 317 w a s designed to control iadj to less than 100ua and keep it constant. t o do th is, all quiescent operating current is returned to the output terminal. t h is imposes the requirement for a minimum load current. if the load current is less than this minimum, the output voltage w ill rise. since the t s 317 is a floating regulator, it is only the voltage differential across the circuit w h ich is important to performance, and operati on at high voltages w i th respect to ground is possible. figure 5. basic circuit configuration load regulation t he t s 317 is capable of providing extremely good load regulation, but a few prec autions are needed to obtain maximum performance. f o r best performance, the programming resistor (r1) should be connected as close to the regulator as possible to minimize line drops w h ich effectively appear in series w i th the reference, thereby degradi ng regulation. t he ground end of r2 can be returned near the load ground to provide remote ground sensing and improve load regulation. external capacitor a 0.1 p f disc or 1 p f tantalum input by pass capacitor (cin) is recommended to reduce the sensitivity to input line impedance. t he adjustment terminal may be by passed to ground to improve ripple rejection. t h is capacitor (cadj) prevents ripple from being amplified as the output voltage is rejection about 15db at 120 h z in a 10v application. although the t s 317 is st able w i th no output capacitance, like any feedback ci rcuit, certain values of external capacitance can c ause excessive ringing. an output increased. a 10u p f capacitor should improve ripple capacitance (co) in t he form of a 1uf tantalum or 25uf aluminum electroly t ic capacitor on the output sw amps this effect and insures stability . protection diode w hen external capacitors are used w i th any i.c. regulator it is sometimes necessary to add protection diodes to prevent the c apacitors from discharging through low current points into the regulator. f i gure 18 show s the t s 317 w i th the recommended protection diodes for output voltages in excess of 25 v or high capacitance values (co > 25uf , cadj > 10uf ). diode d1 prevents co from discharging thru the i.c. during an input short circuit. diode d2 protects against capacitor c ad j discharging through the i.c. during an output short circuit. t he combination of diodes d1 and d2 prevents c ad j from discharging through the i.c. during an input short circuit. figure 6. v o ltage regulator w i th protection diode TS317 5-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
application information figure 7. ?laboratory? pow er supply w i th ad justable current limit and output v o ltage figure 8. adjustable current limiter figure 9. 5v electronic shutdow n regulator figure10. slow turn-on regulator figure 11. current regulator TS317 6-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
to-220 mechanical drawing i j h e g f d c b a m n o l k p t o -220 dimension millimet e r s i n c h e s dim m i n max m i n m a x a 1 0 . 0 0 0 1 0 . 5 0 0 0 . 3 9 4 0 . 4 1 3 b 3 . 2 4 0 4 . 4 4 0 0 . 1 2 8 0 . 1 7 5 c 2 . 4 4 0 2 . 9 4 0 0 . 0 9 6 0 . 1 1 6 d - 6 . 3 5 0 - 0 . 2 5 0 e 0 . 3 8 1 1 . 1 0 6 0 . 0 1 5 0 . 0 4 0 f 2 . 3 4 5 2 . 7 1 5 0 . 0 9 2 0 . 0 5 8 g 4 . 6 9 0 5 . 4 3 0 0 . 0 9 2 0 . 1 0 7 h 1 2 . 7 0 0 1 4 . 7 3 2 0 . 5 0 0 0 . 5 8 1 i 8 . 3 8 2 9 . 0 1 7 0 . 3 3 0 0 . 3 5 5 j 1 4 . 2 2 4 1 6 . 5 1 0 0 . 5 6 0 0 . 6 5 0 k 3 . 5 5 6 4 . 8 2 6 0 . 1 4 0 0 . 1 9 0 l 0 . 5 0 8 1 . 3 9 7 0 . 0 2 0 0 . 0 5 5 m 2 7 . 7 0 0 2 9 . 6 2 0 1 . 0 6 0 1 . 2 3 0 n 2 . 0 3 2 2 . 9 2 1 0 . 0 8 0 0 . 1 1 5 o 0 . 2 5 5 0 . 6 1 0 0 . 0 1 0 0 . 0 2 4 p 5 . 8 4 2 6 . 8 5 8 0 . 2 3 0 0 . 2 7 0 to-263 mechanical drawing a d b c h g e f i t o -263 dimension millimet e r s i n c h e s dim m i n m a x m i n max a 1 0 . 0 0 0 1 0 . 5 0 0 0 . 3 9 4 0 . 4 1 3 b 1 4 . 6 0 5 1 5 . 8 7 5 0 . 5 7 5 0 . 6 2 5 c 0 . 5 0 8 0 . 9 9 1 0 . 0 2 0 0 . 0 3 9 d 2 . 4 2 0 2 . 6 6 0 0 . 0 9 5 0 . 1 0 5 e 4 . 0 6 4 4 . 8 3 0 0 . 1 6 0 0 . 1 9 0 f 1 . 1 1 8 1 . 4 0 0 0 . 0 4 5 0 . 0 5 5 g 0 . 4 5 0 0 . 7 3 0 0 . 0 1 8 0 . 0 2 9 h 8 . 2 8 0 8 . 8 0 0 0 . 3 2 5 0 . 3 4 6 i 1 . 1 4 0 1 . 4 0 0 0 . 0 4 4 0 . 0 5 5 j 1 . 4 8 0 1 . 5 2 0 0 . 0 5 8 0 . 0 6 0 TS317 7-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
to-252 mechanical drawing b c d a f g i h e j t o -252 dimension millimet e r s i n c h e s dim m i n max m i n m a x a 6 . 5 7 0 6 . 8 4 0 0 . 2 5 9 0 . 2 6 9 b 9 . 2 5 0 1 0 . 4 0 0 0 . 3 6 4 0 . 4 0 9 c 0 . 5 5 0 0 . 7 0 0 0 . 0 2 2 0 . 0 2 8 d 2 . 5 6 0 2 . 6 7 0 0 . 1 0 1 0 . 1 0 5 e 2 . 3 0 0 2 . 3 9 0 0 . 0 9 0 0 . 0 9 4 f 0 . 4 9 0 0 . 5 7 0 0 . 0 1 9 0 . 0 2 2 g 1 . 4 6 0 1 . 5 8 0 0 . 0 5 7 0 . 0 6 2 h 0 . 5 2 0 0 . 5 7 0 0 . 0 2 0 0 . 0 2 2 i 5 . 3 4 0 5 . 5 5 0 0 . 2 1 0 0 . 2 1 9 j 1 . 4 6 0 1 . 6 4 0 0 . 0 5 7 0 . 0 6 5 sot-223 mechanical drawing g h e d f c a b j k i sot - 223 dimension millimet e r s i n c h e s dim m i n max m i n m a x a 6 . 3 5 0 6 . 8 5 0 0 . 2 5 0 0 . 2 7 0 b 2 . 9 0 0 3 . 1 0 0 0 . 1 1 4 0 . 1 2 2 c 3 . 4 5 0 3 . 7 5 0 0 . 1 3 6 0 . 1 4 8 d 0 . 5 9 5 0 . 6 3 5 0 . 0 2 3 0 . 0 2 5 e 4 . 5 5 0 4 . 6 5 0 0 . 1 7 9 0 . 1 8 3 f 2 . 2 5 0 2 . 3 5 0 0 . 0 8 8 0 . 0 9 3 g 0 . 8 3 5 1 . 0 3 5 0 . 0 3 2 0 . 0 4 1 h 6 . 7 0 0 7 . 3 0 0 0 . 2 6 3 0 . 2 8 7 i 0 . 2 5 0 0 . 3 5 5 0 . 0 1 0 0 . 0 1 4 j 1 0 x 1 6 x 1 0 x 1 6 x k 1 . 5 5 0 1 . 8 0 0 0 . 0 6 1 0 . 0 7 1 TS317 8-8 2003/ 12 rev. d www.datasheet.co.kr datasheet pdf - http://www..net/
|
