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date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation solved by tm general description the s p317l is an adjustable 3-terminal positive voltage regulator capable of supplying 100ma over a 1.2v to 12v output range. this voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. both line and load regulation are better than standard fixed regulators. in addition to higher performance than fixed regulators, s p317l employs overload protection. included on the chip are current limiting and thermal overload protection. all overload protection circuitry remains fully functional even when the adjustment terminal is disconnected. the s p317l is available in standard to-92 and n soic-8 packages. features adjustable output down to 1.2v guaranteed 100ma output current output short circuit protected line regulation: 0.01%/v load regulation: 0.1% current limit constant with t emperature 70 db ripple rejection applications high efficiency linear regulators post regulation for switching supplies microprocessor power supply mother board i/o power supply figure . package t ypes of s p317l to-92 n soic-8 available in lead free, rohs compliant package 8 nc 7 v out 6 v out 3 n soic-8 package nc v in v out v out adj 2 sp317l 3-terminal adjustable voltage regulator
2 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation pin configuration n1 package (to-92) functional block diagram figure 3. functional block diagram of s p317l 8 nc 7 v out 6 v out 3 n package ( narrow soic-8) nc v in v out v out adj 2 figure 2. pin configuration of s p317l t op view v out adj v in v in v out adj 1 2 3
3 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation recommended operating conditions parameter symbol value unit input voltage v in 20 v input-output voltage differential 15 v operating junction temperature range t j 150 o c storage temperature range t stg -65 to 150 o c power dissipation p d 700 mw lead temperature (soldering, 4 sec.) t lead 260 o c esd (machine model) esd 250 v parameter symbol min max unit input voltage v in 15 v operating junction temperature range t j 0 125 o c note 1: stresses greater than those listed under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. exposure to "absolute maximum ratings" for extended periods may affect device reliability. absolute maximum ratings (note 1)
date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation electrical characteristics o c d t j d 125 o c, v in -v out = 5v , i out = 40ma, p d d mw , unless otherwise specified. parameter symbol conditions min t yp max unit line regulation reg line t j = 25 o c, 3v d (v in -v out ) d 15v i l d 20ma (note 2) 0.01 0.04 %/v 3v d (v in -v out ) d 15v , i l d 20ma (note 2) 0.02 0.07 %/v load regulation reg load t j = 25 o c, 5ma d i out d 100ma (note 2) 0.1 0.5 % 5ma d i out d 100ma (note 2) 0.3 1.5 % thermal regulation t j = 25 o c, 10ms pulse 0.04 0.2 %/w adjust pin current 50 100 p a adjust pin current change 5ma d i l d 100ma 3v d (v in -v out ) d 15v 0.2 5 p a reference v oltage v ref 3v d (v in -v out ) d 15v 5ma d i out d 100ma 1.20 1.25 1.30 v current limit i limit 3v d (v in -v out ) d 13v 100 200 300 ma minimum load cur- rent 3v d (v in -v out ) d 13v 3.5 5 ma ripple rejection v out = 10v , f = 120hz, c adj = 0 p f 62 db v out = 10v , f = 120hz, c adj = 10 p f 60 70 t emperature stability 0 o c d7 j d o c 0.65 % long t erm stability t j =125 o c, 1000 hours 0.3 1 % rms output noise, % of v out t j = 25 o c, 10hz d f d.+ z 0.003 % thermal resistance junction to case to-92 n soic-8 185 175 o c/w note 2: regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. changes in output voltage due to heating effects are covered under the specification of thermal regulation.
date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation t ypical performance characteristics figure . load regulation vs. t emperature figure . output v oltage vs. input v oltage figure 6. reference v oltage vs. t emperature figure 7. adjustment current vs. t emperature 8 0 2 6 8 20 .2 .220 .22 .230 .23 .20 .2 o u t p u t v o l t a g e ( v ) input voltage (v) s p317l i o =0ma -2 0 2 0 7 00 2 -0.06 -0.0 -0.02 0.00 0.02 0.0 0.06 - i o =00ma i o =0ma o u t p u t v o l t a g e d e v i a t i o n ( v ) temperature ( o c) s p317l v in =0.2v v out =.2v -2 0 2 0 7 00 2 .230 .23 .20 .2 .20 .2 .260 .26 - i o =0ma i o =00ma r e f e r e n c e v o l t a g e ( v ) temperature( o c) s p317l v in =0.2v v out =.2v -2 0 2 0 7 00 2 2 6 8 0 2 - i o =00ma i o =0ma a d j u s t p i n c u r r e n t ( p a ) temperature ( o c) s p317l v in =0.2v v out =.2v
6 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation figure 8. dropout v oltage vs. temperature figure . minimum operating current figure 0. ripple rejection vs. output voltage t ypical performance characteristics (continued) figure . ripple rejection vs. frequency 00 000 0000 00000 0 0 20 30 0 0 60 70 80 c adj =0 p f c adj =0 p f r i p p l e r e j e c t i o n ( d b ) fre qu e nc y (hz) s p317l v in = 0 .2 v v out =.2 v i o =0 m a t a =2 o c 2 6 8 0 2 6 0 0 20 30 0 0 60 70 80 c adj =0 p f c adj =0 p f r i p p l e r e j e c t i o n ( d b ) output voltage (v) s p317l v in - v out = v i o = 0ma f = 20hz t a = 2 o c -2 0 2 0 7 00 2 .2 .3 . . .6 .7 .8 . - i o =00ma i o =0ma i n p u t o u t p u t d i f f e r e n t i a l ( v ) temperature ( o c) s p317l v out =.2v 2 6 8 0 2 6 0 2 3 6 q u i e s c e n t c u r r e n t ( m a ) input-output differential (v) s p317l v out =.2v t a =2 o c
7 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation t ypical performance characteristics (continued) figure 2. load t ransient response figure 3. line t ransient response s p317l i o = 0 m a v o u t = .2 v c in = 0. f c l = f t a = 2 o c ' v out ' v in (0.2v to .2v) l o a d o u t p u t v o l t a g e d e v i a t i o n c u r r e n t i n p u t v o l t a g e c h a n g e o u t p u t v o l t a g e d e v i a t i o n o u t p u t v o l t a g e d e v i a t i o n d i s s i p a t i o n ' v out s p317l v out =.2v c in =0. f c l = f t a =2 o c ' power=w 1w figure . thermal regulation 50ma s p317l v in =0.2v v out =.2v c in =0. f c l = f t a =2 o c ' v out ' i out (ma to 00ma)
8 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation figure 6. current limited 6v charger figure 7. high stability 0v regulator figure . v logic regulator with electronic note 3: sets peak current, i peak = 0.6v/r figure 8. adjustable regulator with improved ripple rejection shutdown (minimum output = .2v) note : 000 p f is recommended to filter out note : discharge c if output is shorted any input transients. to ground. r2 720 v in v out adj c 0. p f r 20 c2 0. p f k q 2n22 s p317l v v in ttl 7v ~ 8v v out r3 r2 k v in v out adj c2 0. p f r 20 c3 p f solid tantalum s p317l v in c 0 p f d n002 v out r 0 (note 3) v in v out adj c 000 p f (note ) r 20 r3 00 q 2n2222 s p317l v in v ~ 8v r2 .k r3 267 % v in v out adj c 0. p f r 2k % s p317l 0v v in v v out r2 .k % d lm32 t ypical application
date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation figure . adjustable regulator with current limit note 6: short circuit current is approximately 600mv/r3 or 60ma note 7: at 2.ma output only 3/v of drop occurs in r3 and r. figure 20. slow t urn-on v regulator v in v out adj s p317l v in v out n002 r 20 v 2n20 r 2.7k c2 0. p f r3 0k c 2 p f r=2r3=22 v in v out adj r 20 r3 0 q 2n22 s p317l transformer rectifiers and filter capacitor v out = .2v(r2/r +) + - r2 2k
0 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation in operation, the sp3 7l develops a nominal .2 v reference voltage, v ref , between the output and the adjustment terminal. the reference voltage is impressed across program resistor r and, since the voltage is constant, a constant current i then fows through the output set resistor r2, giving an output voltage of: v out = v ref * { + r2/r} + i adj (r2) since the 100a current from the adjust - ment terminal represents an error term, the sp3 7l was designed to minimize iadj and make it very constant with line and load changes. to do this, all quiescent operating current is returned to the output establishing a minimum load current re - quirement. if there is insuffcient load on the output, the output will rise. figure 21: r1, r2 and quiescent current external capacitors although the sp3 7l is stable with no output capacitors, like any feedback circuit, certain values of external capacitance can a pplication inform ation cause excessive ringing. this occurs with values between 00pf and 000pf. a f solid tantalum (or 2f aluminum electrolytic) on the output swamps this effect and insures stability. an input bypass capacitor is recommended in case the regulator is more than 6 inches away from the usual large flter capacitor. a 0. f disc or f solid tantalum on the input is suitable input bypassing for almost all applications. the device is more sensitive to the absence of input bypassing when adjustment or output capacitors are used, but the above values will eliminate the possibility of problems. the adjustment terminal can be bypassed to ground on the sp3 7l to improve ripple rejection and noise. this bypass capacitor prevents ripple and noise from being amplifed as the output voltage is increased. with a 0f bypass capacitor 80db ripple rejection is obtainable at any output level. increases over 0f do not appreciably improve the ripple rejection at frequencies above 20hz. if the bypass capacitor is used, it is sometimes necessary to include protection diodes to prevent the capacitor from discharging through internal low current paths and damaging the device. in general, the best type of capacitors to use is solid tantalum. solid tantalum capacitors have low impedance even at high frequencies. depending upon capacitor construction, it takes about 2 f in aluminum electrolytic to equal f solid tantalum at high frequencies. ceramic capacitors are also good at high frequencies; but some types have a large decrease in capacitance at frequencies around 0. mhz. for this reason, a 0.0 f disc may seem to work better than a 0.f disc as a bypass. sp317l v in r 2 r 1 adj i adj v out v in v out v ref i 1
date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation mechanical dimensions unit: mm(inch) 2.0(0.06) 2.60(0.0) 0.380(0.0) 0.0(0.022) .600(0.063) max .00(0.) .00(0.7) .270(0.00) typ 3.300(0.30) 3.700(0.6) .300(0.6) .700(0.8) .00(0.03) .00(0.0) .00(0.73) .700(0.8) 3.30(0.3) min 0.360(0.0) 0.0(0.020) 0.000(0.000) 0.380(0.0) to-92 p ackage: 3 pin to-92
2 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation mechanical dimensions (continued) unit: mm(inch) 0 8 r0.0(0.006) r0.0(0.006) .000(0.03) 0.330(0.03) 0.0(0.020) .800(0.8) .000(0.7) .30(0.03) .70(0.06) 0.00(0.00) 0.300(0.02) 0.00(0.03) 0.800(0.03) 0.200(0.008) 3.800(0.0) .000(0.7) 7 7 20: d .270(0.00) typ 0.0(0.007) 0.20(0.00) 8 d .800(0.228) 6.200(0.2) 0.67(0.027) 0.72(0.02) 0.320(0.03) 8 n soic-8 p ackage: 8 pin nsoic
3 date: 8//06 rev h sp3 7l 3-terminal 00ma adjustable voltage regulator ? 2006 sipex corporation sipex corporation headquarters and sales offce 233 south hillview drive milpitas, ca 03 tel: (08) 3-700 fax: ( 08) 3-7600 ordering inform ation sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. p art number package - l : lead free and rohs compliant s p317l / tr: t ape and reel or ammo blank: t ube or bulk sipex corporation's pb-free products, as designated with "-l" suffix in the part number , are rohs compliant. n 1 : to-92 n: n soic-8 ordering information solved by tm part number temperature range voltage tolerance output voltage package pin count packing type sp37ln-l/tr 0oc to +2oc .0% adj to- 2 3 2,000/ammo sp37ln-l 0oc to +2oc .0% adj nsoic 8 8 00/tube sp37ln-l/tr 0oc to +2oc .0% adj nsoic 8 8 2,00/tr

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