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lt3008 series 1 3008fc temperature (c) dropout voltage (mv) quiescent current (a) 400 3008 ta01b 200 100 50 0 500 300 250 150 5 350 2 3 1 0 6 450 4 C50 C25 0 25 50 75 100 125 150 i load = 20ma dropout voltage i q typical application features applications description 3 a i q , 20ma, 45v low dropout linear regulators the lt ? 3008 series are micropower, low dropout voltage (ldo) linear regulators. the devices supply 20ma output current with a dropout voltage of 300mv. no-load quiescent current is 3a. ground pin current remains at less than 5% of output current as load increases. in shutdown, quiescent current is less than 1a. the lt3008 regulators optimize stability and transient response with low esr ceramic capacitors, requiring a minimum of only 2.2f. the regulators do not require the addition of esr as is common with other regulators. internal protection circuitry includes current limiting, thermal limiting, reverse-battery protection and reverse- current protection. the lt3008 series are ideal for applications that require moderate output drive capability coupled with ultralow standby power consumption. the device is available in ? xed output voltages of 1.2v, 1.5v, 1.8v, 2.5v, 3.3v and 5v, and an adjustable version with an output voltage range of 0.6v to 44.5v. the lt3008 is available in the thermally enhanced 6-lead dfn and 8-lead tsot-23 packages. 3.3v, 20ma supply with shutdown n ultralow quiescent current: 3a n input voltage range: 2.0v to 45v n output current: 20ma n dropout voltage: 300mv n adjustable output (v adj = v out(min) = 600mv) n fixed output voltages: 1.2v, 1.5v, 1.8v, 2.5v, 3.3v, 5v n output tolerance: 2% over load, line and temperature n stable with low esr, ceramic output capacitors (2.2f minimum) n shutdown current: <1a n current limit protection n reverse-battery protection n thermal limit protection n tsot-23 and 2mm 2mm dfn packages n automotive n low current battery-powered systems n keep-alive power supplies n remote monitoring n utility meters n low power industrial applications in shdn 2.2f 3008 ta01a out sense v in 3.8v to 45v gnd lt3008-3.3 v out 3.3v 20ma 1f dropout voltage/quiescent current l , lt, ltc, ltm, linear technology and the linear logo are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners.
lt3008 series 2 3008fc pin configuration absolute maximum ratings in pin voltage ......................................................... 50v out pin voltage ...................................................... 50v input-to-output differential voltage ........................ 50v adj pin voltage ...................................................... 50v sense pin voltage .................................................. 50v shdn pin voltage (note 8) .....................................50v output short-circuit duration .......................... inde? nite (note 1) top view gnd shdn in **sense/adj out out dc package 6-lead (2mm s 2mm) plastic dfn 4 5 7 6 3 2 1 t jmax = 125c, ja = 65c/w to 85c/w* exposed pad (pin 7) is gnd, must be soldered to pcb shdn 1 gnd 2 gnd 3 gnd 4 8 nc 7 adj/sense** 6 out 5 in top view ts8 package 8-lead plastic tsot-23 t jmax = 125c, ja = 65c/w to 85c/w* operating junction temperature range (notes 2, 3) e, i grade ...........................................C40c to 125c mp grade ...........................................C55c to 125c storage temperature range ...................C65c to 150c lead temperature: soldering, 10 sec ts8 package only ............................................. 300c order information lead free finish tape and reel part marking* package description temperature range lt3008edc#pbf lt3008edc#trpbf ldps 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc#pbf lt3008idc#trpbf ldps 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-1.2#pbf lt3008edc-1.2#trpbf lfhc 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-1.2#pbf lt3008idc-1.2#trpbf lfhc 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-1.5#pbf lt3008edc-1.5#trpbf lfhf 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-1.5#pbf lt3008idc-1.5#trpbf lfhf 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-1.8#pbf lt3008edc-1.8#trpbf lfhh 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-1.8#pbf lt3008idc-1.8#trpbf lfhh 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-2.5#pbf lt3008edc-2.5#trpbf lfhk 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-2.5#pbf lt3008idc-2.5#trpbf lfhk 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-3.3#pbf lt3008edc-3.3#trpbf lfhn 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-3.3#pbf lt3008idc-3.3#trpbf lfhn 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-5#pbf lt3008edc-5#trpbf lfhq 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-5#pbf lt3008idc-5#trpbf lfhq 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008ets8#pbf lt3008ets8#trpbf ltdsx 8-lead plastic tsot-23 C40c to 125c * see the applications information section. ** sense for fixed voltage output versions.
lt3008 series 3 3008fc order information lead free finish tape and reel part marking* package description temperature range lt3008its8#pbf lt3008its8#trpbf ltdsx 8-lead plastic tsot-23 C40c to 125c lt3008mpts8#pbf lt3008mpts8#trpbf ltdsx 8-lead plastic tsot-23 C55c to 125c lt3008ets8-1.2#pbf lt3008ets8-1.2#trpbf ltfhd 8-lead plastic tsot-23 C40c to 125c lt3008its8-1.2#pbf lt3008its8-1.2#trpbf ltfhd 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-1.2#pbf lt3008mpts8-1.2#trpbf ltfhd 8-lead plastic tsot-23 C55c to 125c lt3008ets8-1.5#pbf lt3008ets8-1.5#trpbf ltfhg 8-lead plastic tsot-23 C40c to 125c lt3008its8-1.5#pbf lt3008its8-1.5#trpbf ltfhg 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-1.5#pbf lt3008mpts8-1.5#trpbf ltfhg 8-lead plastic tsot-23 C55c to 125c lt3008ets8-1.8#pbf lt3008ets8-1.8#trpbf ltfhj 8-lead plastic tsot-23 C40c to 125c lt3008its8-1.8#pbf lt3008its8-1.8#trpbf ltfhj 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-1.8#pbf lt3008mpts8-1.8#trpbf ltfhj 8-lead plastic tsot-23 C55c to 125c lt3008ets8-2.5#pbf lt3008ets8-2.5#trpbf ltfhm 8-lead plastic tsot-23 C40c to 125c lt3008its8-2.5#pbf lt3008its8-2.5#trpbf ltfhm 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-2.5#pbf lt3008mpts8-2.5#trpbf ltfhm 8-lead plastic tsot-23 C55c to 125c lt3008ets8-3.3#pbf lt3008ets8-3.3#trpbf ltfhp 8-lead plastic tsot-23 C40c to 125c lt3008its8-3.3#pbf lt3008its8-3.3#trpbf ltfhp 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-3.3#pbf lt3008mpts8-3.3#trpbf ltfhp 8-lead plastic tsot-23 C55c to 125c lt3008ets8-5#pbf lt3008ets8-5#trpbf ltfhr 8-lead plastic tsot-23 C40c to 125c lt3008its8-5#pbf lt3008its8-5#trpbf ltfhr 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-5#pbf lt3008mpts8-5#trpbf ltfhr 8-lead plastic tsot-23 C55c to 125c lead based finish tape and reel part marking* package description temperature range lt3008edc lt3008edc#tr ldps 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc lt3008idc#tr ldps 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-1.2 lt3008edc-1.2#tr lfhc 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-1.2 lt3008idc-1.2#tr lfhc 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-1.5 lt3008edc-1.5#tr lfhf 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-1.5 lt3008idc-1.5#tr lfhf 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-1.8 lt3008edc-1.8#tr lfhh 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-1.8 lt3008idc-1.8#tr lfhh 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-2.5 lt3008edc-2.5#tr lfhk 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-2.5 lt3008idc-2.5#tr lfhk 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-3.3 lt3008edc-3.3#tr lfhn 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-3.3 lt3008idc-3.3#tr lfhn 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008edc-5 lt3008edc-5#tr lfhq 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008idc-5 lt3008idc-5#tr lfhq 6-lead (2mm 2mm) plastic dfn C40c to 125c lt3008ets8 lt3008ets8#tr ltdsx 8-lead plastic tsot-23 C40c to 125c lt3008its8 lt3008its8#tr ltdsx 8-lead plastic tsot-23 C40c to 125c lt3008mpts8 lt3008mpts8#tr ltdsx 8-lead plastic tsot-23 C55c to 125c lt3008ets8-1.2 lt3008ets8-1.2#tr ltfhd 8-lead plastic tsot-23 C40c to 125c lt3008its8-1.2 lt3008its8-1.2#tr ltfhd 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-1.2 lt3008mpts8-1.2#tr ltfhd 8-lead plastic tsot-23 C55c to 125c
lt3008 series 4 3008fc electrical characteristics the l denotes the speci? cations which apply over the full operating temperature range, otherwise speci? cations are at t j = 25c. (note 2) parameter conditions min typ max units operating voltage l 24 5v regulated output voltage lt3008-1.2: v in = 2v, i load = 100a 2v < v in < 45v, 1a < i load < 20ma l 1.188 1.176 1.2 1.2 1.212 1.224 v v lt3008-1.5: v in = 2.05v, i load = 100a 2.05v < v in < 45v, 1a < i load < 20ma l 1.485 1.47 1.5 1.5 1.515 1.53 v v lt3008-1.8: v in = 2.35v, i load = 100a 2.35v < v in < 45v, 1a < i load < 20ma l 1.782 1.764 1.8 1.8 1.818 1.836 v v lt3008-2.5: v in = 3.05v, i load = 100a 3.05v < v in < 45v, 1a < i load < 20ma l 2.475 2.45 2.5 2.5 2.525 2.55 v v lt3008-3.3: v in = 3.85v, i load = 100a 3.85v < v in < 45v, 1a < i load < 20ma l 3.267 3.234 3.3 3.3 3.333 3.366 v v lt3008-5: v in = 5.55v, i load = 100a 5.55v < v in < 45v, 1a < i load < 20ma l 4.95 4.9 5 5 5.05 5.1 v v adj pin voltage (notes 3, 4) v in = 2v, i load = 100a 2v < v in < 45v, 1a < i load < 20ma l 594 588 600 600 606 612 mv mv line regulation (note 3) lt3008-1.2: v in = 2v to 45v, i load = 1ma lt3008-1.5: v in = 2.05v to 45v, i load = 1ma lt3008-1.8: v in = 2.35v to 45v, i load = 1ma lt3008-2.5: v in = 3.05v to 45v, i load = 1ma lt3008-3.3: v in = 3.85v to 45v, i load = 1ma lt3008-5: v in = 5.55v to 45v, i load = 1ma lt3008: v in = 2v to 45v, i load = 1ma l l l l l l l 1.2 1.5 1.8 2.5 3.3 5 0.6 6 7.5 9 12.5 16.5 25 3 mv mv mv mv mv mv mv lead based finish tape and reel part marking* package description temperature range lt3008ets8-1.5 lt3008ets8-1.5#tr ltfhg 8-lead plastic tsot-23 C40c to 125c lt3008its8-1.5 lt3008its8-1.5#tr ltfhg 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-1.5 lt3008mpts8-1.5#tr ltfhg 8-lead plastic tsot-23 C55c to 125c lt3008ets8-1.8 lt3008ets8-1.8#tr ltfhj 8-lead plastic tsot-23 C40c to 125c lt3008its8-1.8 lt3008its8-1.8#tr ltfhj 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-1.8 lt3008mpts8-1.8#tr ltfhj 8-lead plastic tsot-23 C55c to 125c lt3008ets8-2.5 lt3008ets8-2.5#tr ltfhm 8-lead plastic tsot-23 C40c to 125c lt3008its8-2.5 lt3008its8-2.5#tr ltfhm 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-2.5 lt3008mpts8-2.5#tr ltfhm 8-lead plastic tsot-23 C55c to 125c lt3008ets8-3.3 lt3008ets8-3.3#tr ltfhp 8-lead plastic tsot-23 C40c to 125c lt3008its8-3.3 lt3008its8-3.3#tr ltfhp 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-3.3 lt3008mpts8-3.3#tr ltfhp 8-lead plastic tsot-23 C55c to 125c lt3008ets8-5 lt3008ets8-5#tr ltfhr 8-lead plastic tsot-23 C40c to 125c lt3008its8-5 lt3008its8-5#tr ltfhr 8-lead plastic tsot-23 C40c to 125c lt3008mpts8-5 lt3008mpts8-5#tr ltfhr 8-lead plastic tsot-23 C55c to 125c consult ltc marketing for parts speci? ed with wider operating temperature ranges. *the temperature grade is identi? ed by a label on the shipping container. for more information on lead free part marking, go to: http://www.linear.com/leadfree/ for more information on tape and reel speci? cations, go to: http://www.linear.com/tapeandreel/ order information
lt3008 series 5 3008fc parameter conditions min typ max units load regulation (note 3) lt3008-1.2: v in = 2v, i load = 1a to 10ma v in = 2v, i load = 1a to 20ma l l 0.8 1 4 10 mv mv lt3008-1.5: v in = 2.05v, i load = 1a to 10ma v in = 2.05v, i load = 1a to 20ma l l 1 1.3 5 13 mv mv lt3008-1.8: v in = 2.35v, i load = 1a to 10ma v in = 2.35v, i load = 1a to 20ma l l 1.2 1.5 6 15 mv mv lt3008-2.5: v in = 3.05v, i load = 1a to 10ma v in = 3.05v, i load = 1a to 20ma l l 1.7 2.1 8.3 21 mv mv lt3008-3.3: v in = 3.85v, i load = 1a to 10ma v in = 3.85v, i load = 1a to 20ma l l 2.2 2.8 11 28 mv mv lt3008-5: v in = 5.55v, i load = 1a to 10ma v in = 5.55v, i load = 1a to 20ma l l 3.4 4.2 17 42 mv mv lt3008: v in = 2v, i load = 1a to 10ma v in = 2v, i load = 1a to 20ma l l 0.4 0.5 2 5 mv mv dropout voltage v in = v out(nominal) (notes 5, 6) i load = 100a i load = 100a l 115 180 250 mv mv i load = 1ma i load = 1ma l 170 250 350 mv mv i load = 10ma i load = 10ma l 270 340 470 mv mv i load = 20ma i load = 20ma l 300 365 500 mv mv quiescent current (notes 6, 7) i load = 0a i load = 0a l 3 6 a a gnd pin current v in = v out(nominal) + 0.5v (notes 6, 7) i load = 0a i load = 100a i load = 1ma i load = 10ma i load = 20ma l l l l l 3 6 21 160 350 6 12 50 500 1200 a a a a a output voltage noise (note 9) c out = 2.2f, i load = 20ma, bw = 10hz to 100khz 92 v rms adj pin bias current C10 0.4 10 na shutdown threshold v out = off to on v out = on to off l l 0.25 0.67 0.61 1.5 v v shdn pin current v shdn = 0v, v in = 45v v shdn = 45v, v in = 45v l l 0.65 1 2 a a quiescent current in shutdown v in = 6v, v shdn = 0v l <1 a ripple rejection (note 3) v in C v out = 2v, v ripple = 0.5v p-p , f ripple = 120hz, i load = 20ma lt3008 lt3008-1.2 lt3008-1.5 lt3008-1.8 lt3008-2.5 lt3008-3.3 lt3008-5 58 54 53 52 49 47 42 70 66 65 64 61 59 54 db db db db db db db electrical characteristics the l denotes the speci? cations which apply over the full operating temperature range, otherwise speci? cations are at t j = 25c. (note 2)
lt3008 series 6 3008fc note 1: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. note 2: the lt3008 regulators are tested and speci? ed under pulse load conditions such that t j ? t a . the lt3008e is guaranteed to meet performance speci? cations from 0c to 125c operating junction temperature. speci? cations over the C40c to 125c operating junction temperature range are assured by design, characterization and correlation with statistical process controls. the lt3008i is guaranteed over the full C 40c to 125c operating junction temperature range. the lt3008mp is 100% tested and guaranteed over the C55c to 125c operating junction temperature range. note 3: the lt3008 adjustable version is tested and speci? ed for these conditions with the adj pin connected to the out pin. note 4: operating conditions are limited by maximum junction temperature. the regulated output voltage speci? cation will not apply for all possible combinations of input voltage and output current. when operating at the maximum input voltage, the output current range must be limited. when operating at the maximum output current, the input voltage must be limited. note 5: dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a speci? ed output current. in dropout, the output voltage equals (v in C v dropout ). for the lt3008-1.2 and lt3008- 1.5, dropout voltage will be limited by the minimum input voltage. note 6: to satisfy minimum input voltage requirements, the lt3008 adjustable version is tested and speci? ed for these conditions with an external resistor divider (61.9k bottom, 280k top) which sets v out to 3.3v. the external resistor divider adds 9.69a of dc load on the output. this external current is not factored into gnd pin current. note 7: gnd pin current is tested with v in = v out(nominal) + 0.55v and a current source load. gnd pin current will increase in dropout. for the ? xed output voltage versions, an internal resistor divider will add about 1a to the gnd pin current. see the gnd pin current curves in the typical performance characteristics section. note 8: the shdn pin can be driven below gnd only when tied to the in pin directly or through a pull-up resistor. if the shdn pin is driven below gnd by more than C0.3v while in is powered, the output will turn on. note 9: output noise is listed for the adjustable version with the adj pin connected to the out pin. see the rms output noise vs load current curve in the typical performance characteristics section. electrical characteristics the l denotes the speci? cations which apply over the full operating temperature range, otherwise speci? cations are at t j = 25c. (note 2) parameter conditions min typ max units current limit v in = 45v, v out = 0 v in = v out(nominal) + 1v, v out = C 5% l 22 75 ma ma input reverse-leakage current v in = C45v, v out = 0 l 130 a reverse-output current v out = 1.2v, v in = 0 0.6 10 a
lt3008 series 7 3008fc 0 0.6 0.4 0.2 0.8 1 1.2 1.4 1.6 1.8 2 temperature (c) minimum input voltage (v) 3008 g03 i load = 20ma C50 C25 0 25 50 75 100 125 150 output current (ma) 0 0 dropout voltage (mv) 50 150 200 250 10 12 14 20 450 100 2468 1618 300 350 400 3008 g01 t j = 125c t j = 25c temperature (c) 0 dropout voltage (mv) 50 150 200 250 450 100 300 350 400 3008 g02 20ma 10ma 1ma 100a C50 C25 0 25 50 75 100 125 150 dropout voltage dropout voltage minimum input voltage typical performance characteristics t a = 25c, unless otherwise noted. output voltage lt3008-1.8 temperature (c) output voltage (v) 3008 g07 1.788 1.824 1.830 1.836 1.770 1.776 1.812 1.800 1.782 1.816 1.764 1.806 1.794 C50 C25 0 25 50 75 100 125 15 0 i load = 100a output voltage lt3008-3.3 temperature (c) output voltage (v) 3008 g08 2.480 2.540 2.550 2.460 2.520 2.500 2.470 2.530 2.450 2.510 2.490 C50 C25 0 25 50 75 100 125 150 i load = 100a output voltage lt3008-2.5 temperature (c) output voltage (v) 3008 g09 3.267 3.278 3.355 3.366 3.245 3.322 3.300 3.256 3.333 3.344 3.234 3.311 3.289 C50 C25 0 25 50 75 100 125 150 i load = 100a adj pin voltage temperature (c) adj pin voltage (v) 3008 g04 0.596 0.608 0.610 0.612 0.590 0.592 0.604 0.600 0.594 0.606 0.588 0.602 0.598 C50 C25 0 25 50 75 100 125 150 i l = 100a output voltage lt3008-1.2 output voltage lt3008-1.5 temperature (c) output voltage (v) 3008 g05 1.192 1.216 1.220 1.224 1.180 1.184 1.208 1.200 1.188 1.212 1.176 1.204 1.196 C50 C25 0 25 50 75 100 125 150 i load = 100a temperature (c) output voltage (v) 3008 g06 1.490 1.520 1.525 1.530 1.475 1.480 1.510 1.500 1.485 1.515 1.470 1.505 1.495 C50 C25 0 25 50 75 100 125 150 i load = 100a
lt3008 series 8 3008fc typical performance characteristics t a = 25c, unless otherwise noted. 0 200 450 500 2 4 6 100 350 150 400 50 0 300 250 1 3 8 10 5 7 9 3008 g15 input voltage (v) gnd pin current (a) r l = 75, i l = 20ma r l = 150, i l = 10ma r l = 1.5k, i l = 1ma r l = 15k, i l = 100a 0 200 450 500 2 4 6 100 350 150 400 50 0 300 250 1 3 8 10 5 7 9 3008 g14 input voltage (v) gnd pin current (a) r l = 60, i l = 20ma r l = 120, i l = 10ma r l = 1.2k, i l = 1ma r l = 12k, i l = 100a gnd pin current lt3008-1.2 gnd pin current lt3008-1.5 gnd pin current lt3008-1.8 0 200 450 500 2 4 6 100 350 150 400 50 0 300 250 1 3 8 10 5 7 9 3008 g16 input voltage (v) gnd pin current (a) r l = 90, i l = 20ma r l = 180, i l = 10ma r l = 1.8k, i l = 1ma r l = 18k, i l = 100a gnd pin current lt3008-2.5 gnd pin current lt3008-3.3 0 200 450 500 2 4 6 100 350 150 400 50 0 300 250 1 3 8 10 5 7 9 3008 g17 input voltage (v) gnd pin current (a) r l = 125, i l = 20ma r l = 250, i l = 10ma r l = 2.5k, i l = 1ma r l = 25k, i l = 100a 0 200 450 500 2 4 6 100 350 150 400 50 0 300 250 1 3 8 10 5 7 9 3008 g18 input voltage (v) gnd pin current (a) r l = 165, i l = 20ma r l = 330, i l = 10ma r l = 3.3k, i l = 1ma r l = 33k, i l = 100a quiescent current input voltage (v) quiescent current (a) 3008 g13 12 30 3 6 18 21 9 0 27 24 15 02 14 3568 7910 lt3008-1.2 lt3008-1.5 lt3008-1.8 lt3008-2.5 lt3008-3.3 lt3008-5 temperature (c) output voltage (v) 3008 g10 4.950 5.075 5.100 5.025 5.000 4.925 5.050 4.900 4.975 C50 C25 0 25 50 75 100 125 150 i load = 100a output voltage lt3008-5 adj pin bias current adjustable quiescent current temperature (c) adj pin bias current (na) 3008 g05 C4 8 10 C10 C8 4 0 C6 6 2 C2 C50 C25 0 25 50 75 100 125 150 temperature (c) quiescent current (a) 3008 g06 2 5 6 1 4 3 0 C50 C25 0 25 50 75 100 125 150
lt3008 series 9 3008fc typical performance characteristics t a = 25c, unless otherwise noted. shdn pin input current shdn pin input current 0 0.8 1.8 2 10 20 30 0.4 1.4 0.6 1.6 0.2 0 1.2 1 515 45 25 35 40 3008 g22 shdn pin voltage (v) shdn pin input current (a) C50 0.8 2 0 25 75 0.4 1.6 0.6 1.8 0.2 0 1.4 1 1.2 C25 100 150 50 125 3008 g23 temperature (c) shdn pin input current (a) v shdn = 45v current limit reverse-output current 40 100 20 70 80 30 90 10 0 60 50 3008 g24 temperature (c) current limit (ma) C50 0 75 C25 25 150 50 100 125 v in = 2v v in = 45v 3008 g25 temperature (c) reverse output current (a) 20 50 10 35 40 15 45 5 0 30 25 C50 0 75 C25 25 150 50 100 125 out adj out = adj = 1.2v in = shdn = gnd input ripple rejection 0 10 30 20 40 50 70 60 90 80 frequency (hz) 3008 g26 10 100 1000 100000 10000 1000000 input ripple rejection (db) v in = 2.1v + 50mv rms v out = 600mv i load = 20ma 2.2f 10f input ripple rejection input ripple rejection (db) 60 80 30 40 50 70 20 10 0 3008 g27 temperature (c) C50 0 75 C25 25 150 50 100 125 v in = v out (nominal) + 2v + 0.5v p-p ripple at f = 120hz i load = 20ma gnd pin current lt3008-5 0 200 450 500 2 4 6 100 350 150 400 50 0 300 250 1 3 8 10 5 7 9 3008 g19 input voltage (v) gnd pin current (a) r l = 250, i l = 20ma r l = 500, i l = 10ma r l = 5k, i l = 1ma r l = 50k, i l = 100a gnd pin current vs i load 1 10 100 1000 load (ma) gnd current (a) 3008 g20 0.001 0.01 0.1 1 10 100 v in = 3.8v v out = 3.3v C50 0.6 1.4 1.5 075 0.3 1.2 1.1 0.4 0.5 1.3 0.1 0.2 0 1 0.9 0.8 0.7 C25 25 150 50 100 125 3008 g21 temperature (c) shdn pin threshold (v) off to on on to off shdn pin thresholds
lt3008 series 10 3008fc typical performance characteristics t a = 25c, unless otherwise noted. transient response 500s/div v out 50mv/div i out 20ma/div 3008 g31 i out = 1ma to 20ma v in = 5.5v v out = 5v c out = 2.2f transient response 500s/div v out 50mv/div i out 20ma/div 3008 g32 i out = 1ma to 20ma v in = 5.5v v out = 5v c out = 10f transient response (load dump) 1ms/div v out 50mv/div 45v 12v v in 10v/div 3008 g33 v out = 5v i out = 20ma c out = 4.7f load regulation output noise spectral density frequency (hz) 0.1 output noise spectral density (v hz) 1 100 10 3008 g29 10 100 1k 10k 100k 5v 3.3v 2.5v 1.8v 1.5v 1v 0.6v c out = 2.2f i load = 20ma 0 0.5 2 2.5 1.5 1 3 3.5 4 4.5 5 load regulation (mv) 3008 g28 temperature (c) C50 0 75 C25 25 150 50 100 125 $i l = 1a to 20ma v out = 600mv v in = 2v rms output noise vs load current i load (ma) 0.001 350 450 400 500 10 3008 g30 300 250 0.01 0.1 1 100 200 100 150 50 0 output noise (v rms ) 3.3v 2.5v 1.8v 1.2v 0.6v 1.5v 5v c out = 10f
lt3008 series 11 3008fc pin functions shdn (pin 1/pin 5): shutdown. pulling the shdn pin low puts the lt3008 into a low power state and turns the output off. if unused, tie the shdn pin to v in . the lt3008 does not function if the shdn pin is not connected. the shdn pin cannot be driven below gnd unless tied to the in pin. if the shdn pin is driven below gnd while in is powered, the output will turn on. shdn pin logic cannot be referenced to a negative rail. gnd (pins 2, 3, 4/pin 6): ground. connect the bottom of the resistor divider that sets output voltage directly to gnd for the best regulation. in (pin 5/pin 4): input. the in pin supplies power to the device. the lt3008 requires a bypass capacitor at in if the device is more than six inches away from the main input ? lter capacitor. in general, the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-powered circuits. a bypass capacitor in the range of 0.1f to 10f will suf? ce. the lt3008 withstands reverse voltages on the in pin with respect to ground and the out pin. in the case of a reversed input, which occurs with a battery plugged in backwards, the lt3008 acts as if a blocking diode is in series with its input. no reverse current ? ows into the lt3008 and no reverse voltage appears at the load. the device protects both itself and the load. out (pin 6/pins 2, 3): output. this pin supplies power to the load. use a minimum output capacitor of 2.2f to prevent oscillations. large load transient applications require larger output capacitors to limit peak voltage transients. see the applications information section for more information on output capacitance and reverse-output characteristics. adj (pin 7/pin 1): adjust. this pin is the error ampli? ers inverting terminal. its 400pa typical input bias current ? ows out of the pin (see curve of adj pin bias current vs temperature in the typical performance characteristics section). the adj pin voltage is 600mv referenced to gnd and the output voltage range is 600mv to 44.5v. nc (pin 8, tsot-23 package only): no connect. pin 8 is an nc pin in the tsot-23 package. this pin is not tied to any internal circuitry. it may be ? oated, tied to v in or tied to gnd. gnd (exposed pad pin 7, dfn package only): ground. the exposed pad (backside) of the dfn package is an electrical connection to gnd. to ensure optimum performance, solder pin 7 to the pcb and tie directly to pin 6. sense (pin 7/pin 1): sense. for ? xed voltage versions of the lt3008 (lt3008-1.2, lt3008-1.5, lt3008-1.8, lt3008- 2.5, lt3008-3.3, lt3008-5), the sense pin is the input to the error ampli? er. optimum regulation is obtained at the point where the sense pin is connected to the out pin of the regulator. in critical applications, small voltage drops are caused by the resistance (rp) of pc traces between the regulator and the load. these may be eliminated by connecting the sense pin to the output at the load as shown in figure 1 (kelvin sense connection). note that the voltage drop across the external pc traces add to the dropout voltage of the regulator. the sense pin bias current is 1a at the nominal rated output voltage. the sense pin can be pulled below ground (as in a dual supply system where the regulator load is returned to a negative supply) and still allow the device to start and operate. (tsot-23/dfn) in shdn 3008 f01 r p out v in sense gnd lt3008 r p + + load figure 1. kelvin sense connection
lt3008 series 12 3008fc applications information the lt3008 is a low dropout linear regulator with ultra- low quiescent current and shutdown. quiescent current is extremely low at 3a and drops well below 1a in shutdown. the device supplies up to 20ma of output current. dropout voltage at 20ma is typically 300mv. the lt3008 incorporates several protection features, making it ideal for use in battery-powered systems. the device protects itself against both reverse-input and reverse-output voltages. in battery backup applications, where a backup battery holds up the output when the input is pulled to ground, the lt3008 acts as if a blocking diode is in series with its output and prevents reverse current ? ow. in applications where the regulator load returns to a negative supply, the output can be pulled below ground by as much as 50v without affecting start-up or normal operation. adjustable operation the lt3008 has an output voltage range of 0.6v to 44.5v. figure 2 shows that output voltage is set by the ratio of two external resistors. the ic regulates the output to maintain the adj pin voltage at 600mv referenced to ground. the current in r1 equals 600mv/r1 and the current in r2 is the current in r1 minus the adj pin bias current. the adj pin bias current, typically 400pa at 25c, ? ows out of the pin. calculate the output voltage using the formula in figure 2. an r1 value of 619k sets the divider current to 0.97a. do not make r1s value any greater than 619k to minimize output voltage errors due to the adj pin bias current and to insure stability under minimum load conditions. in shutdown, the output turns off and the divider current is zero. curves of adj pin voltage vs temperature and adj pin bias current vs temperature appear in the typical performance characteristics. speci? cations for output voltages greater than 0.6v are proportional to the ratio of the desired output voltage to 0.6v: v out /0.6v. for example, load regulation for an output current change of 100a to 20ma is C0.5mv typical at v out = 0.6v. at v out = 5v, load regulation is: 5v 0.6v ?( ? 0.5mv) =? 4.17mv table 1 shows resistor divider values for some com- mon output voltages with a resistor divider current of about 1a. figure 2. adjustable operation table 1. output voltage resistor divider values v out r1 r2 1v 604k 402k 1.2v 590k 590k 1.5v 590k 887k 1.8v 590k 1.18m 2.5v 590k 1.87m 3v 590k 2.37m 3.3v 619k 2.8m 5v 590k 4.32m in shdn r2 r1 3008 f02 out v in v out = 600mv ? (1 + r2/r1) C (i adj ? r2) v adj = 600mv i adj = 0.4na at 25c output range = 0.6v to 44.5v adj gnd l t3008 v out
lt3008 series 13 3008fc applications information dc bias voltage (v) change in value (%) 3008 f03 20 0 C20 C40 C60 C80 C100 0 4 8 10 26 12 14 x5r y5v 16 both capacitors are 16v, 1210 case size, 10f temperature (c) C50 40 20 0 C20 C40 C60 C80 C100 25 75 3008 f04 C25 0 50 100 125 y5v change in value (%) x5r both capacitors are 16v, 1210 case size, 10f figure 3. ceramic capacitor dc bias characteristics figure 4. ceramic capacitor temperature characteristics because the adj pin is relatively high impedance (de- pending on the resistor divider used), stray capacitances at this pin should be minimized. special attention should be given to any stray capacitances that can couple ex- ternal signals onto the adj pin, producing undesirable output transients or ripple. extra care should be taken in assembly when using high valued resistors. small amounts of board contamination can lead to signi? cant shifts in output voltage. appropriate post-assembly board cleaning measures should be implemented to prevent board contamination. if the board is to be subjected to humidity cycling or if board cleaning measures cannot be guaranteed, consideration should be given to using resistors an order of magnitude smaller than in table 1 to prevent contamination from causing unwanted shifts in the output voltage. a ? xed voltage option in the lt3008 series will not need these special considerations. output capacitance and transient response the lt3008 is stable with a wide range of output capacitors. the esr of the output capacitor affects stability, most notably with small capacitors. use a minimum output capacitor of 2.2f with an esr of 3 or less to prevent oscillations. the lt3008 is a micropower device and output load transient response is a function of output capacitance. larger values of output capacitance decrease the peak deviations and provide improved transient response for larger load current changes. give extra consideration to the use of ceramic capacitors. manufacturers make ceramic capacitors with a variety of dielectrics, each with different behavior across temperature and applied voltage. the most common dielectrics are speci? ed with eia temperature characteristic codes of z5u, y5v, x5r and x7r. the z5u and y5v dielectrics provide high c-v products in a small package at low cost, but exhibit strong voltage and temperature coef? cients as shown in figures 3 and 4. when used with a 5v regulator, a 16v 10f y5v capacitor can exhibit an effective value as low as 1f to 2f for the dc bias voltage applied and over the operating temperature range. the x5r and x7r dielectrics yield more stable characteristics and are more suitable for use as the output capacitor. the x7r type has better stability across temperature, while the x5r is less expensive and is available in higher values. one must still exercise care when using x5r and x7r capacitors; the x5r and x7r codes only specify operating temperature range and maximum capacitance change over temperature. capacitance change due to dc bias with x5r and x7r capacitors is better than y5v and z5u capacitors, but can still be signi? cant enough to drop capacitor values below appropriate levels. capacitor dc bias characteristics tend to improve as component case size increases, but expected capacitance at operating voltage should be veri? ed. voltage and temperature coef? cients are not the only sources of problems. some ceramic capacitors have a
lt3008 series 14 3008fc applications information figure 5. noise resulting from tapping on a ceramic capacitor gnd pin current is found by examining the gnd pin current curves in the typical performance characteristics section. power dissipation is equal to the sum of the two components listed prior. the lt3008 regulator has internal thermal limiting designed to protect the device during overload conditions. for continuous normal conditions, do not exceed the maximum junction temperature rating of 125c. carefully consider all sources of thermal resistance from junction to ambient including other heat sources mounted in proximity to the lt3008. for surface mount devices, heat sinking is accomplished by using the heat spreading capabilities of the pc board and its copper traces. copper board stiffeners and plated through-holes can also be used to spread the heat generated by power devices. the following tables list thermal resistance for several different board sizes and copper areas. all measurements were taken in still air on 3/32" fr-4 two-layer boards with one ounce copper. pcb layers, copper weight, board layout and thermal vias affect the resultant thermal resistance. although tables 2 and 3 provide thermal resistance numbers for 2-layer boards with 1 ounce copper, modern multilayer pcbs provide better performance than found in these tables. 100ms/div v out 500v/div 3008 f0 5 v out = 0.6v c out = 22f i load = 10a piezoelectric response. a piezoelectric device generates voltage across its terminals due to mechanical stress, similar to the way a piezoelectric accelerometer or microphone works. for a ceramic capacitor, the stress can be induced by vibrations in the system or thermal transients. the resulting voltages produced can cause appreciable amounts of noise, especially when a ceramic capacitor is used for noise bypassing. a ceramic capacitor produced figure 5s trace in response to light tapping from a pencil. similar vibration induced behavior can masquerade as increased output voltage noise. table 2: measured thermal resistance for dc package copper area board area thermal resistance (junction-to-ambient) topside* backside 2500mm 2 2500mm 2 2500mm 2 65c/w 1000mm 2 2500mm 2 2500mm 2 70c/w 225mm 2 2500mm 2 2500mm 2 75c/w 100mm 2 2500mm 2 2500mm 2 80c/w 50mm 2 2500mm 2 2500mm 2 85c/w *device is mounted on the topside. thermal considerations the lt3008s maximum rated junction temperature of 125c limits its power-handling capability. two components comprise the power dissipated by the device: 1. output current multiplied by the input/output voltage differential: i out ? (v in C v out ) 2. gnd pin current multiplied by the input voltage: i gnd ? v in
lt3008 series 15 3008fc applications information so, p = 20ma(12.6v C 3.3v) + 0.3ma(12.6v) = 189.8mw the thermal resistance ranges from 65c/w to 85c/w depending on the copper area. so, the junction temperature rise above ambient approximately equals: 0.1898w(75c/w) = 14.2c the maximum junction temperature equals the maximum junction temperature rise above ambient plus the maximum ambient temperature or: t j(max) = 85c + 14.2c = 99.2c protection features the lt3008 incorporates several protection features that make it ideal for use in battery-powered circuits. in ad- dition to the normal protection features associated with monolithic regulators, such as current limiting and thermal limiting, the device also protects against reverse-input voltages, reverse-output voltages and reverse output-to- input voltages. current limit protection and thermal overload protec- tion protect the device against current overload condi- tions at the output of the device. for normal operation, do not exceed a junction temperature of 125c. the typical thermal shutdown circuitry temperature threshold is 160c. the in pin withstands reverse voltages of 50v. the device limits current ? ow to less than 30a (typically less than 1a) and no negative voltage appears at out. the device protects both itself and the load against batteries that are plugged in backwards. for example, a 4-layer, 1 ounce copper pcb board with 3 thermal vias from the dfn exposed backside or the 3 fused tsot-23 gnd pins to inner layer gnd planes achieves 45c/w thermal resistance. demo circuit dc 1388as board layout achieves this 45c/w performance. this is approximately a 30% improvement over the lowest numbers shown in tables 2 and 3. calculating junction temperature example: given an output voltage of 3.3v, an input voltage range of 12v 5%, an output current range of 0ma to 20ma and a maximum ambient temperature of 85c, what will the maximum junction temperature be for an application using the dc package? the power dissipated by the device is equal to: i out(max) (v in(max) C v out ) + i gnd (v in(max) ) where, i out(max) = 20ma v in(max) = 12.6v i gnd at (i out = 20ma, v in = 12.6v) = 0.3ma table 3: measured thermal resistance for tsot-23 package copper area board area thermal resistance (junction-to-ambient) topside* backside 2500mm 2 2500mm 2 2500mm 2 65c/w 1000mm 2 2500mm 2 2500mm 2 67c/w 225mm 2 2500mm 2 2500mm 2 70c/w 100mm 2 2500mm 2 2500mm 2 75c/w 50mm 2 2500mm 2 2500mm 2 85c/w *device is mounted on the topside.
lt3008 series 16 3008fc applications information the shdn pin cannot be driven below gnd unless tied to the in pin. if the shdn pin is driven below gnd while in is powered, the output will turn on. shdn pin logic cannot be referenced to a negative rail. the lt3008 incurs no damage if out is pulled below ground. if in is left open circuit or grounded, out can be pulled below ground by 50v. no current ? ows from the pass transistor connected to out. however, current ? ows in (but is limited by) the resistor divider that sets output voltage. current ? ows from the bottom resistor in the divider and from the adj pins internal clamp through the top resistor in the divider to the external circuitry pulling out below ground. if in is powered by a voltage source, out sources current equal to its current limit capability and the lt3008 protects itself by thermal limiting if necessary. in this case, grounding the shdn pin turns off the lt3008 and stops out from sourcing current. the lt3008 incurs no damage if the adj pin is pulled above or below ground by 50v. if in is left open circuit or grounded, adj acts like a 100k resistor in series with a diode when pulled above or below ground. in circuits where a backup battery is required, several different input/output conditions can occur. the output voltage may be held up while the input is either pulled output and adj voltage (v) 0 60 80 100 8 40 20 50 70 90 30 10 0 21 43 67 9 5 10 3008 f06 reverse current (a) out current adj current figure 6. reverse-output current to ground, pulled to some intermediate voltage or is left open circuit. current ? ow back into the output follows the curve shown in figure 6. if the lt3008 in pin is forced below the out pin or the out pin is pulled above the in pin, input current typically drops to less than 1a. this occurs if the lt3008 input is connected to a discharged (low voltage) battery and either a backup battery or a second regulator circuit holds up the output. the state of the shdn pin has no effect in the reverse current if out is pulled above in.
lt3008 series 17 3008fc typical applications in shdn 3.3v 3009 ta02 out 1f 2.2f sense gnd l t3008-3.3 no protection diodes needed! v in 12v load: system monitor, volatile memory, etc. in shdn 5v 3008 ta03 out fault 1f supercap 2.2f sense pwr to monitoring center sense gnd gnd l t3008-5 line power v line 12v to 15v d charge r limit line interrupt detect keep-alive power supply last-gasp circuit package description note: 1. drawing to be made a jedec package outline m0-229 variation of (wccd-2) 2. drawing not to scale 3. all dimensions are in millimeters 4. dimensions of exposed pad on bottom of package do not include mold flash. mold flash, if present, shall not exceed 0.15mm on any side 2.00 0.10 (4 sides) 0.75 0.05 pin 1 bar top mark (see note 6) 0.200 ref 0.00 C 0.05 0.25 0.05 1.42 0.05 (2 sides) recommended solder pad pitch and dimensions 0.61 0.05 (2 sides) 1.15 0.05 0.70 0.05 2.55 0.05 package outline 0.50 bsc 0.40 0.10 bottom viewexposed pad 0.56 0.05 (2 sides) r = 0.125 typ r = 0.05 typ 1.37 0.05 (2 sides) 1 3 64 (dc6) dfn rev b 1309 0.25 0.05 0.50 bsc pin 1 notch r = 0.20 or 0.25 45 chamfer 5. exposed pad shall be solder plated 6. shaded area is only a reference for pin 1 location on the top and bottom of package dc6 package 6-lead plastic dfn (2mm 2mm) (reference ltc dwg # 05-08-1703 rev b)
lt3008 series 18 3008fc 1.50 C 1.75 (note 4) 2.80 bsc 0.22 C 0.36 8 plcs (note 3) datum a 0.09 C 0.20 (note 3) ts8 tsot-23 0710 rev a 2.90 bsc (note 4) 0.65 bsc 1.95 bsc 0.80 C 0.90 1.00 max 0.01 C 0.10 0.20 bsc 0.30 C 0.50 ref pin one id note: 1. dimensions are in millimeters 2. drawing not to scale 3. dimensions are inclusive of plating 4. dimensions are exclusive of mold flash and metal burr 5. mold flash shall not exceed 0.254mm 6. jedec package reference is mo-193 3.85 max 0.40 max 0.65 ref recommended solder pad layout per ipc calculator 1.4 min 2.62 ref 1.22 ref ts8 package 8-lead plastic tsot-23 (reference ltc dwg # 05-08-1637 rev a) package description
lt3008 series 19 3008fc information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. revision history rev date description page number b 02/10 added mp grade in ts8 package revised curve g04 in typical performance characteristics 2-4, 6 7 c 04/12 clari? ed e-grade operating temperature updated package drawings 6 17, 18 (revision history begins at rev b)
lt3008 series 20 3008fc linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 www.linear.com linear technology corporation 2007 lt 0412 rev c ? printed in usa related parts part number description comments lt1761 100ma, low noise micropower ldo v in : 1.8v to 20v, v out = 1.22v, v do = 0.3v, i q = 20a, i sd < 1a, low noise: < 20v rms , stable with 1f ceramic capacitors, thinsot tm package lt1762 150ma, low noise micropower ldo v in : 1.8v to 20v, v out = 1.22v, v do = 0.3v, i q = 25a, i sd < 1a, low noise: < 20v rms , ms8 package lt1763 500ma, low noise micropower ldo v in : 1.8v to 20v, v out = 1.22v, v do = 0.3v, i q = 30a, i sd < 1a, low noise: < 20v rms , s8 package LT1764/LT1764a 3a, low noise, fast transient response ldos v in : 2.7v to 20v, v out = 1.21v, v do = 0.34v, i q = 1ma, i sd < 1a, low noise: < 40v rms , LT1764a version stable with ceramic capacitors, dd and to220-5 packages lt1962 300ma, low noise micropower ldo v in : 1.8v to 20v, v out(min) = 1.22v, v do = 0.27v, i q = 30a, i sd < 1a, low noise: < 20v rms , ms8 package lt1963/lt1963a 1.5a, low noise, fast transient response ldos v in : 2.1v to 20v, v out(min) = 1.21v, v do = 0.34v, i q = 1ma, i sd < 1a, low noise: < 40v rms , lt1963a version stable with ceramic capacitors, dd, to220-5, sot223 and s8 packages lt3009 20ma, 3a i q micropower ldo v in : 1.6v to 20v, low i q : 3a, v do = 0.28v, 2mm 2mm dfn and sc70-8 packages lt3020 100ma, low voltage vldo v in : 0.9v to 10v, v out(min) = 0.20v, v do = 0.15v, i q = 120a, i sd < 1a, 3mm 3mm dfn and ms8 packages lt3021 500ma, low voltage vldo v in : 0.9v to 10v, v out(min) = 0.20v, v do = 0.16v, i q = 120a, i sd < 3a, 5mm 5mm dfn and so8 packages lt3080/ lt3080-1 1.1a, parallelable, low noise, low dropout linear regulator 300mv dropout voltage (2-supply operation), low noise: 40v rms , v in : 1.2v to 36v, v out : 0v to 35.7v, current-based reference with 1-resistor v out set; directly parallelable (no op amp required), stable with ceramic caps, to-220, sot-223, msop and 3mm 3mm dfn packages; lt3080-1 version has integrated internal ballast resistor lt3085 500ma, parallelable, low noise, low dropout linear regulator 275mv dropout voltage (2-supply operation), low noise: 40v rms , v in : 1.2v to 36v, v out : 0v to 35.7v, current-based reference with 1-resistor v out set; directly parallelable (no op amp required), stable with ceramic caps, msop-8 and 2mm 3mm dfn packages thinsot is a trademark of linear technology corporation. in shdn 2.2f 3.3v 3008 ta04a out 1f sense gnd l t3008-3.3 v in 12v low duty cycle pulsed load 0ma to 10ma low duty cycle applications average power savings for low duty cycle applications 0ma to 10ma pulsed load, in = 12v duty cycle (%) 0.1 70 60 80 90 100 3008 ta04b 40 50 30 11 0 20 10 0 power savings (%) 10a i q 100a i q 30a i q typical application

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