Version 4
SHEET 1 880 680
WIRE 0 64 -32 64
WIRE 112 64 64 64
WIRE 160 64 112 64
WIRE 256 64 224 64
WIRE 496 80 336 80
WIRE 336 96 336 80
WIRE 496 96 496 80
WIRE 112 112 112 64
WIRE -32 176 -32 64
WIRE -32 176 -112 176
WIRE -16 176 -32 176
WIRE 288 176 240 176
WIRE -112 192 -112 176
WIRE 496 192 496 176
WIRE -32 256 -32 176
WIRE -16 256 -32 256
WIRE 256 256 256 64
WIRE 256 256 240 256
WIRE 336 256 336 192
WIRE 336 256 256 256
WIRE 384 256 336 256
WIRE 496 256 464 256
WIRE 576 256 496 256
WIRE 496 272 496 256
WIRE 576 272 576 256
WIRE -112 288 -112 272
WIRE -16 336 -96 336
WIRE 288 336 240 336
WIRE -96 368 -96 336
WIRE 336 368 336 352
WIRE 496 368 496 336
WIRE 576 368 576 352
WIRE 112 416 112 400
WIRE -96 464 -96 448
FLAG 112 416 0
FLAG -96 464 0
FLAG -112 288 0
FLAG 336 368 0
FLAG 496 192 0
FLAG 496 368 0
FLAG 576 368 0
SYMBOL voltage -112 176 R0
WINDOW 3 20 97 Left 2
SYMATTR Value 6
SYMATTR InstName V1
SYMBOL voltage -96 352 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 6 0 10n 10n 1u 2u)
SYMBOL nmos 288 96 R0
SYMATTR InstName Q1
SYMATTR Value IRF7468
SYMBOL nmos 288 256 R0
SYMATTR InstName Q2
SYMATTR Value IRF7468
SYMBOL cap 224 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL voltage 496 80 R0
SYMATTR InstName V3
SYMATTR Value 32
SYMBOL ind 368 272 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1µ
SYMBOL cap 480 272 R0
SYMATTR InstName C2
SYMATTR Value 10µ
SYMBOL res 560 256 R0
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL PowerProducts\\LTC4449 112 256 R0
SYMATTR InstName U1
SYMBOL schottky 0 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
TEXT 392 440 Left 2 !.tran 250u startup