Version 4 SHEET 1 2440 984 WIRE -368 -880 -512 -880 WIRE -240 -880 -288 -880 WIRE -112 -880 -160 -880 WIRE -80 -880 -112 -880 WIRE 32 -880 0 -880 WIRE 112 -880 32 -880 WIRE 432 -880 112 -880 WIRE 832 -880 432 -880 WIRE -512 -864 -512 -880 WIRE 112 -864 112 -880 WIRE -64 -832 -112 -880 WIRE -16 -832 32 -880 WIRE 736 -832 560 -832 WIRE 1120 -832 800 -832 WIRE 112 -784 112 -800 WIRE 480 -784 464 -784 WIRE 560 -784 560 -832 WIRE 560 -784 544 -784 WIRE 608 -784 560 -784 WIRE 720 -784 672 -784 WIRE -512 -768 -512 -784 WIRE 432 -736 432 -880 WIRE 560 -736 560 -784 WIRE 304 -688 32 -688 WIRE 720 -688 720 -784 WIRE 720 -688 688 -688 WIRE 832 -688 832 -880 WIRE 176 -608 144 -608 WIRE 304 -608 240 -608 WIRE 784 -608 688 -608 WIRE 304 -528 272 -528 WIRE 720 -528 720 -624 WIRE 720 -528 688 -528 WIRE 832 -528 832 -592 WIRE 832 -528 720 -528 WIRE 880 -528 832 -528 WIRE 912 -528 880 -528 WIRE 1008 -528 992 -528 WIRE 1024 -528 1008 -528 WIRE 1120 -528 1120 -832 WIRE 1120 -528 1104 -528 WIRE 1168 -528 1120 -528 WIRE 1584 -528 1168 -528 WIRE 1904 -528 1680 -528 WIRE 2128 -528 1904 -528 WIRE 2208 -528 2128 -528 WIRE 1168 -512 1168 -528 WIRE 2208 -512 2208 -528 WIRE 880 -496 880 -528 WIRE 160 -448 144 -448 WIRE 304 -448 240 -448 WIRE 784 -448 688 -448 WIRE 832 -416 832 -432 WIRE 880 -416 880 -432 WIRE 1168 -416 1168 -448 WIRE 2208 -416 2208 -432 WIRE 304 -368 96 -368 WIRE 1008 -368 1008 -528 WIRE 1008 -368 688 -368 WIRE 1904 -352 1904 -528 WIRE 272 -288 272 -528 WIRE 304 -288 272 -288 WIRE 1120 -288 1120 -528 WIRE 1120 -288 688 -288 WIRE 432 -224 432 -240 WIRE 560 -224 560 -240 WIRE 160 -192 144 -192 WIRE 272 -192 272 -288 WIRE 272 -192 240 -192 WIRE 736 -192 272 -192 WIRE 1120 -192 1120 -288 WIRE 1120 -192 816 -192 WIRE 96 -128 96 -368 WIRE 1264 -128 96 -128 WIRE 1280 -128 1264 -128 WIRE 1376 -128 1360 -128 WIRE 2128 -96 2128 -528 WIRE 96 -48 96 -64 WIRE 2080 -48 2128 -96 WIRE 2080 -48 1744 -48 WIRE 2128 -48 2128 -96 WIRE 1264 -32 1264 -128 WIRE 1440 -32 1440 -128 WIRE 1584 -32 1584 -528 WIRE 1664 -32 1664 -480 WIRE 1744 -32 1744 -48 WIRE 2080 16 1840 16 WIRE 32 32 32 -688 WIRE 672 32 32 32 WIRE 1216 32 672 32 WIRE 2128 64 2080 16 WIRE 2128 64 2128 32 WIRE -16 80 -16 -832 WIRE 1216 80 -16 80 WIRE 2080 80 1840 80 WIRE -64 112 -64 -832 WIRE 416 112 -64 112 WIRE 992 112 416 112 WIRE 1120 112 992 112 WIRE 1216 112 1120 112 WIRE 992 128 992 112 WIRE 1120 128 1120 112 WIRE 2128 160 1840 160 WIRE 1120 208 1120 192 WIRE 1904 208 1904 -272 WIRE 1904 208 1840 208 WIRE 992 240 992 208 WIRE 992 240 832 240 WIRE 1216 240 992 240 WIRE 832 256 832 240 WIRE 992 256 992 240 WIRE 1904 304 1904 288 WIRE 1904 304 1840 304 WIRE 1904 320 1904 304 WIRE 832 352 832 320 WIRE 992 352 992 336 WIRE 1216 352 1184 352 WIRE 1216 400 784 400 WIRE 1904 400 1840 400 WIRE 1936 400 1904 400 WIRE 2128 400 2128 160 WIRE 2128 400 2016 400 WIRE 2128 416 2128 400 WIRE 1216 448 912 448 WIRE 672 480 672 32 WIRE 784 480 784 400 WIRE 912 480 912 448 WIRE 1216 496 1024 496 WIRE 1024 512 1024 496 WIRE 1888 512 1840 512 WIRE 2000 512 1888 512 WIRE 2000 528 2000 512 WIRE 2128 528 2128 480 WIRE 1216 544 1136 544 WIRE 1888 544 1888 512 WIRE 1136 560 1136 544 WIRE 1024 592 1024 576 WIRE 2000 624 2000 608 WIRE 2128 624 2128 608 WIRE 1136 640 1136 624 WIRE 1664 640 1664 624 WIRE 1296 656 1296 624 WIRE 1520 656 1520 624 WIRE 1584 656 1584 624 WIRE 1744 656 1744 624 WIRE 1888 656 1888 624 WIRE 1888 656 1744 656 WIRE 416 688 416 112 WIRE 1744 688 1744 656 WIRE 1296 736 1296 720 WIRE 1520 768 1520 736 WIRE 1584 768 1584 736 WIRE 1744 784 1744 752 WIRE 416 800 416 768 WIRE 1408 800 1408 624 WIRE 1408 800 416 800 WIRE 416 832 416 800 WIRE 672 864 672 560 WIRE 784 864 784 560 WIRE 784 864 672 864 WIRE 912 864 912 560 WIRE 912 864 784 864 WIRE 1888 864 1888 656 WIRE 1888 864 912 864 WIRE 416 928 416 912 FLAG 832 -416 0 FLAG 560 -224 0 FLAG 1168 -416 0 FLAG 2208 -416 0 FLAG 2208 -528 OUT FLAG 880 -416 0 FLAG 432 -224 0 FLAG 144 -608 0 FLAG 144 -448 0 FLAG 144 -192 0 FLAG 464 -784 0 FLAG 992 352 0 FLAG 1120 208 0 FLAG 1024 592 0 FLAG 1136 640 0 FLAG 2128 624 0 FLAG 1744 784 0 FLAG 2000 624 0 FLAG 96 -48 0 FLAG -512 -768 0 FLAG -512 -880 IN FLAG 112 -784 0 FLAG 416 928 0 FLAG 1664 640 0 FLAG 1584 768 0 FLAG 1520 768 0 FLAG 1296 736 0 FLAG 832 352 0 SYMBOL nmos 784 -688 R0 SYMATTR InstName Q1 SYMATTR Value BSC123N08NS3 SYMBOL nmos 784 -528 R0 WINDOW 0 -2 31 Right 2 WINDOW 3 38 104 Right 2 SYMATTR InstName Q2 SYMATTR Value BSC123N08NS3 SYMBOL schottky 608 -768 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value MBRS140 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 704 -688 R0 SYMATTR InstName C1 SYMATTR Value .1µ SYMBOL cap 1376 -144 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 39 60 44 VTop 2 SYMATTR InstName C2 SYMATTR Value 47n SYMBOL schottky 864 -432 M180 WINDOW 0 24 72 Left 2 WINDOW 3 20 1 Left 2 SYMATTR InstName D2 SYMATTR Value MBRS1100 SYMATTR Description Diode SYMATTR Type diode SYMBOL ind 896 -512 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMATTR SpiceLine Rpar=2K SYMBOL res 1008 -512 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 3m SYMBOL res 256 -464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 49.9K SYMBOL cap 240 -624 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value .002µ SYMBOL cap 1152 -512 R0 SYMATTR InstName C4 SYMATTR Value 100µ SYMBOL diode 800 -848 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D3 SYMATTR Value 1N4148 SYMBOL res 720 -176 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R3 SYMATTR Value 150K SYMBOL res 144 -176 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R4 SYMATTR Value 16.2K SYMBOL cap 544 -800 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 1µ SYMBOL PowerProducts\\LT3845A 496 -496 R0 SYMATTR InstName U1 SYMBOL res 1376 -112 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R5 SYMATTR Value 14.7K SYMBOL res 656 576 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R6 SYMATTR Value 1Meg SYMBOL res 976 112 R0 SYMATTR InstName R7 SYMATTR Value 1.1Meg SYMBOL res 976 240 R0 SYMATTR InstName R8 SYMATTR Value 100K SYMBOL cap 1104 128 R0 SYMATTR InstName C6 SYMATTR Value 1µ SYMBOL cap 1008 512 R0 SYMATTR InstName C7 SYMATTR Value 10n SYMBOL cap 1120 560 R0 SYMATTR InstName C8 SYMATTR Value 10n SYMBOL res 896 576 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R9 SYMATTR Value 100K SYMBOL res 768 576 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R10 SYMATTR Value 100K SYMBOL pmos 1584 -480 R270 WINDOW 0 59 52 VTop 2 WINDOW 3 26 90 VRight 2 SYMATTR InstName Q3 SYMATTR Value Si4427DY SYMBOL pmos 2080 160 M180 SYMATTR InstName Q4 SYMATTR Value Si4427DY SYMBOL res 1888 -368 R0 SYMATTR InstName R11 SYMATTR Value 1.15Meg SYMBOL res 1888 192 R0 SYMATTR InstName R12 SYMATTR Value 127K SYMBOL res 1888 304 R0 WINDOW 0 44 30 Left 2 WINDOW 3 50 59 Left 2 SYMATTR InstName R13 SYMATTR Value 133K SYMBOL res 2032 384 R90 WINDOW 0 61 54 VBottom 2 WINDOW 3 64 54 VTop 2 SYMATTR InstName R14 SYMATTR Value 1.13Meg SYMBOL voltage 2128 512 R0 WINDOW 3 25 101 Left 2 SYMATTR Value 7.35 SYMATTR InstName V1 SYMBOL cap 1728 688 R0 SYMATTR InstName C9 SYMATTR Value 1µ SYMBOL res 1872 528 R0 SYMATTR InstName R15 SYMATTR Value 10K SYMBOL res 1984 512 R0 SYMATTR InstName R16 SYMATTR Value 10K SYMBOL res 1568 752 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R17 SYMATTR Value 22.1K SYMBOL res 1536 752 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R18 SYMATTR Value 24.9K SYMBOL cap 1280 656 R0 SYMATTR InstName C10 SYMATTR Value .0047µ SYMBOL res 2112 -64 R0 SYMATTR InstName R19 SYMATTR Value 5m SYMBOL cap 80 -128 R0 WINDOW 0 42 15 Left 2 WINDOW 3 37 43 Left 2 WINDOW 39 24 65 Left 2 SYMATTR InstName C11 SYMATTR Value 2200p SYMATTR SpiceLine Rser=20K Cpar=100p SYMBOL cap 2112 416 R0 WINDOW 39 24 77 Left 2 SYMATTR InstName C12 SYMATTR Value 10m SYMATTR SpiceLine Rser=1m SYMBOL diode 816 320 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D4 SYMATTR Value zener_2V SYMBOL voltage -512 -880 R0 WINDOW 3 25 101 Left 2 SYMATTR Value pwl(0 36 6m 36 6.001m 40) SYMATTR InstName V2 SYMBOL res -96 -864 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R20 SYMATTR Value 5m SYMBOL ind -256 -864 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 10n SYMBOL cap 96 -864 R0 WINDOW 39 24 77 Left 2 SYMATTR InstName C13 SYMATTR Value 100µ SYMBOL LTC4000-1 1264 272 R0 SYMATTR InstName U2 SYMBOL res 400 672 R0 SYMATTR InstName R21 SYMATTR Value 31.6K SYMBOL res 400 816 R0 SYMATTR InstName R22 SYMATTR Value 10K SYMBOL res -384 -864 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R23 SYMATTR Value 2 SYMBOL res 2192 -528 R0 SYMATTR InstName Rload SYMATTR Value 10 TEXT 792 904 Left 2 !.tran 0 25m 0.1m uic TEXT 792 936 Left 2 !.model zener_2V D(Ron=100 Roff=1G vfwd=0.01 vrev=2 rrev=100)