Version 4
SHEET 1 880 1172
WIRE -400 -32 -496 -32
WIRE -496 -16 -496 -32
WIRE -864 64 -928 64
WIRE -736 64 -800 64
WIRE -560 64 -736 64
WIRE -560 80 -560 64
WIRE -496 80 -496 64
WIRE -480 80 -496 80
WIRE -400 80 -400 -32
WIRE -224 80 -400 80
WIRE -224 96 -224 80
WIRE -400 112 -400 80
WIRE -736 128 -736 64
WIRE -224 176 -224 160
WIRE -128 176 -224 176
WIRE 16 176 -48 176
WIRE 112 176 16 176
WIRE -928 192 -928 64
WIRE -928 192 -1024 192
WIRE -864 192 -928 192
WIRE -448 192 -608 192
WIRE 112 192 112 176
WIRE 352 192 224 192
WIRE 400 192 352 192
WIRE 512 192 464 192
WIRE 592 192 512 192
WIRE 16 208 16 176
WIRE 352 208 352 192
WIRE 512 208 512 192
WIRE -560 224 -560 144
WIRE -400 224 -400 208
WIRE -400 224 -560 224
WIRE -224 224 -224 176
WIRE -224 224 -400 224
WIRE -256 256 -320 256
WIRE -32 256 -256 256
WIRE -864 272 -960 272
WIRE -560 272 -560 224
WIRE -560 272 -608 272
WIRE -320 272 -320 256
WIRE -320 272 -400 272
WIRE -256 272 -256 256
WIRE 112 272 80 272
WIRE 352 272 224 272
WIRE 512 272 352 272
WIRE 592 272 512 272
WIRE -1024 288 -1024 272
WIRE 224 288 224 272
WIRE -32 304 -32 256
WIRE 16 304 16 272
WIRE 16 304 -32 304
WIRE 80 304 80 272
WIRE 80 304 16 304
WIRE -864 352 -912 352
WIRE -448 352 -608 352
WIRE -960 368 -960 272
WIRE -960 368 -1024 368
WIRE -400 384 -400 368
WIRE -256 384 -256 320
WIRE -256 384 -400 384
WIRE -400 400 -400 384
WIRE -1024 432 -1024 368
WIRE -736 448 -736 416
WIRE -912 464 -912 352
WIRE -800 464 -912 464
WIRE -1024 528 -1024 512
WIRE -800 576 -800 464
WIRE -800 688 -800 656
FLAG -1024 528 0
FLAG -1024 288 0
FLAG -400 400 0
FLAG -480 80 0
FLAG -736 448 0
FLAG -800 688 0
FLAG 224 288 0
SYMBOL ind2 96 288 M180
WINDOW 0 -7 76 Right 2
WINDOW 3 -7 42 Right 2
SYMATTR InstName L1
SYMATTR Value 100µ
SYMATTR Type ind
SYMBOL ind2 240 288 R180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L2
SYMATTR Value 100µ
SYMATTR Type ind
SYMBOL voltage -1024 416 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 10 0 0 0 50µ 100µ)
SYMBOL res -32 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10
SYMBOL voltage -1024 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL diode -864 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MUR460
SYMBOL cap -576 80 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMATTR SpiceLine V=50 Irms=5.62 Rser=0.007 Lser=0 mfg="KEMET" pn="C1210C105K5PAC" type="X5R"
SYMBOL nmos -448 112 R0
SYMATTR InstName M1
SYMATTR Value Si9420DY
SYMBOL nmos -448 272 R0
SYMATTR InstName M2
SYMATTR Value Si9420DY
SYMBOL voltage -496 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 20
SYMBOL voltage -800 560 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(10 0 0 0 0 50µ 100µ)
SYMBOL diode -240 320 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value MUR460
SYMBOL diode -208 160 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value MUR460
SYMBOL diode 32 272 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMATTR Value MUR460
SYMBOL diode 368 272 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D5
SYMATTR Value MUR460
SYMBOL diode 400 208 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D6
SYMATTR Value MUR460
SYMBOL cap 496 208 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMATTR SpiceLine V=100 Irms=4.58 Rser=0.025 Lser=0 mfg="KEMET" pn="C2225C105K1RAC" type="X7R"
SYMBOL res 576 176 R0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL PowerProducts\\LTC4446 -736 272 R0
SYMATTR InstName U1
TEXT 136 176 Bottom 2 !K1 L1 L2 1
TEXT 272 304 Left 2 !.tran 10m startup