Version 4 SHEET 1 1372 864 WIRE 416 -464 -688 -464 WIRE 1120 -464 416 -464 WIRE 864 -432 -448 -432 WIRE -240 -400 -336 -400 WIRE -144 -400 -240 -400 WIRE 128 -400 -144 -400 WIRE 224 -400 128 -400 WIRE 592 -400 224 -400 WIRE 688 -400 592 -400 WIRE 592 -384 592 -400 WIRE -336 -352 -336 -400 WIRE 128 -336 128 -400 WIRE 224 -336 224 -400 WIRE 416 -336 416 -464 WIRE -752 -288 -880 -288 WIRE -592 -288 -752 -288 WIRE -448 -288 -448 -432 WIRE -448 -288 -592 -288 WIRE -240 -288 -240 -400 WIRE 688 -288 688 -400 WIRE -880 -272 -880 -288 WIRE -144 -272 -144 -400 WIRE -96 -272 -144 -272 WIRE 592 -272 592 -304 WIRE 592 -272 544 -272 WIRE -592 -256 -592 -288 WIRE -448 -256 -448 -288 WIRE 864 -256 864 -432 WIRE -880 -176 -880 -192 WIRE -592 -176 -592 -192 WIRE -96 -176 -400 -176 WIRE 816 -176 544 -176 WIRE -240 -80 -240 -224 WIRE -96 -80 -240 -80 WIRE 688 -80 688 -224 WIRE 688 -80 544 -80 WIRE -240 -64 -240 -80 WIRE 688 -64 688 -80 WIRE -688 16 -688 -464 WIRE -688 16 -880 16 WIRE -672 16 -688 16 WIRE -576 16 -592 16 WIRE -560 16 -576 16 WIRE -448 16 -448 -160 WIRE -448 16 -480 16 WIRE -240 16 -240 0 WIRE -240 16 -448 16 WIRE -96 16 -240 16 WIRE 688 16 688 0 WIRE 688 16 544 16 WIRE 864 16 864 -160 WIRE 864 16 688 16 WIRE 896 16 864 16 WIRE 1008 16 976 16 WIRE 1024 16 1008 16 WIRE 1120 16 1120 -464 WIRE 1120 16 1104 16 WIRE -880 32 -880 16 WIRE -448 32 -448 16 WIRE 864 32 864 16 WIRE -96 112 -400 112 WIRE 816 112 544 112 WIRE -880 128 -880 112 WIRE 864 144 864 128 WIRE -448 160 -448 128 WIRE -576 208 -576 16 WIRE -96 208 -576 208 WIRE 1008 208 1008 16 WIRE 1008 208 544 208 WIRE -752 304 -752 -288 WIRE -688 304 -688 16 WIRE -96 304 -688 304 WIRE 1120 304 1120 16 WIRE 1120 304 544 304 WIRE -752 400 -752 384 WIRE -96 400 -752 400 WIRE 672 400 544 400 WIRE 768 400 672 400 WIRE -752 416 -752 400 WIRE 672 416 672 400 WIRE 768 416 768 400 WIRE -96 496 -192 496 WIRE 576 496 544 496 WIRE 768 496 768 480 WIRE -752 512 -752 496 WIRE -192 512 -192 496 WIRE 672 512 672 480 WIRE 32 576 32 560 WIRE 288 576 288 560 WIRE -192 592 -192 576 WIRE 768 608 768 576 FLAG -336 -288 0 FLAG -880 128 0 FLAG -448 160 0 FLAG -592 -176 0 FLAG -880 -176 0 FLAG -880 -288 OUT FLAG -880 16 IN FLAG -752 512 0 FLAG -192 592 0 FLAG 288 576 0 FLAG 672 512 0 FLAG 864 144 0 FLAG 576 496 0 FLAG 32 576 0 FLAG 768 608 0 SYMBOL cap -352 -352 R0 WINDOW 3 30 56 Left 2 SYMATTR Value 4.7µ SYMATTR InstName C1 SYMBOL res 576 -400 R0 SYMATTR InstName R2 SYMATTR Value 100K SYMBOL voltage -880 16 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 10 SYMBOL res -688 32 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R3 SYMATTR Value 4m SYMBOL ind -576 32 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 3.3µ SYMATTR SpiceLine Rser=2m SYMBOL nmos -400 -256 M0 WINDOW 0 5 11 Right 2 WINDOW 3 41 111 Right 2 SYMATTR InstName Q1 SYMATTR Value Si4840DY SYMBOL nmos -400 32 M0 WINDOW 0 -5 21 Right 2 WINDOW 3 24 105 Right 2 SYMATTR InstName Q2 SYMATTR Value Si4840DY SYMBOL cap -256 -64 R0 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL schottky -256 -288 R0 SYMATTR Value MBRS1100 SYMATTR InstName D1 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap -608 -256 R0 SYMATTR InstName C3 SYMATTR Value 220µ SYMATTR SpiceLine Rser=10m SYMBOL res -768 400 R0 SYMATTR InstName R4 SYMATTR Value 12.1K SYMBOL res -768 288 R0 SYMATTR InstName R5 SYMATTR Value 232K SYMBOL cap -208 512 R0 SYMATTR InstName C4 SYMATTR Value 0.01µ SYMBOL res 1008 32 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R6 SYMATTR Value 4m SYMBOL ind 992 32 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 3.3µ SYMATTR SpiceLine Rser=2m SYMBOL nmos 816 -256 R0 WINDOW 0 56 21 Left 2 WINDOW 3 58 77 Left 2 SYMATTR InstName Q3 SYMATTR Value Si4840DY SYMBOL nmos 816 32 R0 WINDOW 0 57 40 Left 2 WINDOW 3 63 102 Left 2 SYMATTR InstName Q4 SYMATTR Value Si4840DY SYMBOL cap 672 -64 R0 SYMATTR InstName C6 SYMATTR Value .1µ SYMBOL schottky 672 -288 R0 WINDOW 3 23 69 Left 2 SYMATTR Value MBRS1100 SYMATTR InstName D2 SYMATTR Description Diode SYMATTR Type diode SYMBOL res -896 -288 R0 SYMATTR InstName Rload SYMATTR Value 2.4 SYMBOL LTC7841 224 112 R0 WINDOW 39 11 275 Center 2 SYMATTR InstName U1 SYMBOL cap 752 416 R0 SYMATTR InstName C7 SYMATTR Value 15n SYMBOL res 752 480 R0 SYMATTR InstName R1 SYMATTR Value 8.66K SYMBOL cap 656 416 R0 SYMATTR InstName C5 SYMATTR Value 100p TEXT 128 680 Left 2 !.tran 2m startup