Version 4
SHEET 1 988 680
WIRE 144 -64 -128 -64
WIRE 368 -64 144 -64
WIRE 512 -64 416 -64
WIRE 608 -64 576 -64
WIRE 672 -64 608 -64
WIRE 800 -64 672 -64
WIRE -128 -48 -128 -64
WIRE 144 -48 144 -64
WIRE 368 -48 368 -64
WIRE 416 -48 416 -64
WIRE 672 -48 672 -64
WIRE 800 -48 800 -64
WIRE -128 48 -128 32
WIRE 48 48 32 48
WIRE 144 48 144 32
WIRE 144 48 112 48
WIRE 416 48 416 32
WIRE 672 48 672 16
WIRE 800 48 800 32
WIRE 368 80 368 32
WIRE 144 96 144 48
WIRE 608 112 608 -64
WIRE -96 160 -112 160
WIRE -16 160 -32 160
WIRE 320 160 304 160
WIRE 368 192 368 176
WIRE 368 192 320 192
WIRE 368 208 368 192
WIRE 608 224 608 192
WIRE 608 224 496 224
WIRE -16 240 -32 240
WIRE 320 240 320 192
WIRE 320 240 304 240
WIRE 608 240 608 224
WIRE 368 304 368 288
WIRE -112 336 -144 336
WIRE -16 336 -48 336
WIRE 496 336 496 224
WIRE 496 336 304 336
WIRE 608 336 608 320
WIRE 144 416 144 400
FLAG 368 304 0
FLAG -128 48 0
FLAG -144 336 0
FLAG 672 48 0
FLAG 608 336 0
FLAG 144 416 0
FLAG 800 48 0
FLAG 32 48 0
FLAG 416 48 0
FLAG -112 160 0
FLAG -128 -64 IN
FLAG 800 -64 OUT
SYMBOL nmos 320 80 R0
SYMATTR InstName Q1
SYMATTR Value Si4848DY
SYMBOL voltage -128 -64 R0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL cap -48 320 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 36 33 VTop 2
WINDOW 39 66 35 VTop 2
SYMATTR InstName C1
SYMATTR Value .0022µ
SYMATTR SpiceLine Rser=7.5K
SYMBOL cap 656 -48 R0
SYMATTR InstName C2
SYMATTR Value 100µ
SYMBOL res 592 96 R0
SYMATTR InstName R1
SYMATTR Value 38.3K
SYMBOL res 592 224 R0
SYMATTR InstName R2
SYMATTR Value 12.1K
SYMBOL PowerProducts\\LTC3873 144 240 R0
SYMATTR InstName U1
SYMBOL ind2 352 48 M180
WINDOW 0 -6 73 Right 2
WINDOW 3 -5 37 Right 2
SYMATTR InstName L1
SYMATTR Value 25µ
SYMATTR Type ind
SYMATTR SpiceLine Rser=100m
SYMBOL ind2 432 -64 M0
WINDOW 0 -6 37 Right 2
WINDOW 3 -6 68 Right 2
SYMATTR InstName L2
SYMATTR Value .25µ
SYMATTR Type ind
SYMATTR SpiceLine Rser=5m
SYMBOL res 128 -64 R0
SYMATTR InstName R3
SYMATTR Value 20K
SYMBOL cap 112 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 4.7µ
SYMBOL schottky 512 -48 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MBR735
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 352 192 R0
SYMATTR InstName R4
SYMATTR Value 68m
SYMBOL cap -32 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value .01µ
SYMBOL res 784 -64 R0
SYMATTR InstName Rload
SYMATTR Value 2.5
TEXT 376 376 Left 2 !.tran 25m startup
TEXT 392 -72 Bottom 2 !K1 L1 L2 1