sst502 series vishay siliconix document number: 70711 s-04234?rev. c, 02-jul-01 www.vishay.com 3-1 current regulator diodes?p ov(min) 45 v sst502 sst504 sst506 SST508 sst510 sst503 sst505 sst507 sst509 sst511
part typ i part typ i part number typ i f (ma) marking part number typ i f (ma) marking sst502 0.43 l2 sst507 1.80 l7 sst503 0.56 l3 SST508 2.40 l8 sst504 0.75 l4 sst509 3.00 l9 sst505 1.00 l5 sst510 3.60 l0 sst506 1.40 l6 sst511 4.70 l1
surface-mount package guaranteed 20% tolerance operation from 1 v (sst502, 3) to 45 v good temperature stability simple series circuitry, no separate voltage source tight guaranteed circuit performance excellent performance in low-voltage/battery circuits and high-voltage spike protection high circuit stability vs. temperature constant-current supply current-limiting timing circuits the sst502 series is a family of 20% range current regulators designed for demanding applications in test equipment and instrumentation. these devices utilize the jfet techniques to produce a device which is extremely simple to operate. with nominal current ranges from 0.43 ma to 4.7 ma, the sst502 series will meet a wide array of design requirements. the low-cost to-236 surface-mount package ensures a cost-effective design solution.
c a 1 2 v+ current source v? current sink v+ out linear ramp generator anode * cathode top view 2 3 to-236 (sot-23) 1 *short lead #2 to cathode (lead #3) via circuit board trace.
sst502 series vishay siliconix www.vishay.com 3-2 document number: 70711 s-04234 ? rev. c, 02-jul-01
peak operating voltage 45 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . reverse current 50 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature ? 55 to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . power dissipation a 350 mw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . notes: a. derate 2.8 mw/ c above 25 c
limits parameter symbol test conditions min typ a max unit peak operating voltage b p ov i f = 1.1 i f(max) 45 55 reverse voltage v r i r = 1 ma 0.8 v capacitance c f v f = 25 v, f = 1 mhz 1.5 pf regulator current c (i f ) dynamic impedance d (z d ) knee impedance (z k ) limiting voltage e (v l ) temperature coefficient ( 1 ) v f = 25 v v f = 25 v v f = 6 v i f = 0.8 i f(min) v f = 25 v 0 c t a 100 c ma m m v %/ c part number min nom max min typ a typ a max typ a typ a sst502 0.344 0.43 0.516 1.0 2.7 0.7 1.5 0.6 ? 0.08 sst503 0.448 0.56 0.672 0.7 2.0 0.5 1.7 0.7 ? 0.12 sst504 0.600 0.75 0.900 0.5 1.5 0.4 1.9 0.8 ? 0.16 sst505 0.800 1.00 1.200 0.4 1.0 0.3 2.1 0.9 ? 0.20 sst506 1.120 1.40 1.680 0.3 0.8 0.2 2.5 1.1 ? 0.24 sst507 1.440 1.80 2.160 0.2 0.6 0.12 2.8 1.3 ? 0.28 SST508 1.900 2.40 2.900 0.1 0.4 0.08 3.1 1.5 ? 0.31 sst509 2.400 3.00 3.600 0.09 0.3 0.06 3.5 1.7 ? 0.34 sst510 2.900 3.60 4.300 0.08 0.3 0.04 3.9 1.9 ? 0.37 sst511 3.800 4.70 5.600 0.07 0.2 0.03 4.2 2.1 ? 0.40 notes: npa a. typical values are for design aid only, not guaranteed nor subject to production testing. b. max v f where i f = 1.1 i f(max) is guaranteed. c. pulse test ? steady state currents may vary. d. pulse test ? steady state impedances may vary. e. min v f required to insure i f = 0.8 i f(min) .
sst502 series vishay siliconix document number: 70711 s-04234 ? rev. c, 02-jul-01 www.vishay.com 3-3 ? 0.45 ? 0.40 ? 0.35 ? 0.30 ? 0.25 ? 0.20 ? 0.15 ? 0.10 ? 0.05 ? 0.00 012345 output current vs. forward voltage dynamic impedance vs. regulator current limiting voltage @ 0.8 i f vs. regulator current temperature coefficient knee impedance vs. regulator current 5 4 3 0 010 50 2 1 20 30 40 (v) f v 10 1 0.1 0.01 0.1 1 10 v f = 6 v i f (ma) 100 10 1 0.1 0.1 1 10 v f = 25 v i f (ma) 0.1 1 10 10 1 0.1 v f = 25 v i f (ma) output current vs. forward voltage 5 4 3 0 01 5 2 1 234 sst502 sst505 SST508 sst510 (v) f v sst511 sst510 SST508 sst505 sst502 sst511 i f (ma) i f (ma) i f (ma) z k (m ? ) t c (% c) z d (m ? ) v l (v)
sst502 series vishay siliconix www.vishay.com 3-4 document number: 70711 s-04234 ? rev. c, 02-jul-01 temperature coefficient vs. regulator current on-resistance vs. regulator current capacitance vs. forward voltage 0.1 1 10 0.5 ? 0.5 0 t j = 0 to 100_c v f = 25 v 2 01 5 1 0 i f (ma) i f (ma) i = 0.1 i f v f = 25 v 10 050 5 0 v f (v) f = 1 mhz 10 20 30 40 234 t c (% c) r ds(on) ? drain-source on-resistance ( ? ) c t ? total capacitance (pf) z k v l i f p ov v r v r v f i f i r r ds
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