Version 4
SHEET 1 1592 680
WIRE 80 16 -48 16
WIRE 416 16 368 16
WIRE 512 16 416 16
WIRE 624 16 512 16
WIRE -48 32 -48 16
WIRE 416 32 416 16
WIRE 512 32 512 16
WIRE 624 32 624 16
WIRE 832 48 672 48
WIRE 928 48 912 48
WIRE 80 80 32 80
WIRE -48 128 -48 112
WIRE 512 128 512 96
WIRE 624 128 624 112
WIRE 416 144 416 112
WIRE 416 144 368 144
WIRE 32 208 32 80
WIRE 80 208 32 208
WIRE 384 208 368 208
WIRE 480 208 464 208
WIRE 432 272 368 272
WIRE 432 336 432 272
WIRE 432 336 368 336
WIRE 432 352 432 336
WIRE 224 416 224 384
WIRE 432 432 432 416
FLAG 432 432 0
FLAG 224 416 0
FLAG 480 208 0
FLAG -48 128 0
FLAG 512 128 0
FLAG 624 128 0
FLAG 672 96 0
FLAG 928 48 0
FLAG -48 16 IN
FLAG 624 16 OUT
SYMBOL cap 416 352 R0
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL voltage -48 16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap 496 32 R0
SYMATTR InstName C2
SYMATTR Value 330µ
SYMBOL LTC4217-12 224 176 R0
SYMATTR InstName U1
SYMBOL res 368 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL res 400 16 R0
SYMATTR InstName R2
SYMATTR Value 20K
SYMBOL sw 624 128 R180
WINDOW 0 -23 102 Right 2
WINDOW 3 -26 2 Right 2
SYMATTR InstName S1
SYMATTR Value SHORT
SYMBOL voltage 816 48 R270
WINDOW 123 -74 56 VBottom 2
WINDOW 39 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 240m 1m 1m 10m)
TEXT 496 368 Left 2 !.model SHORT SW(Ron=10m Roff=1K Vt=.5 Vh=-.4)
TEXT 560 296 Left 2 !.tran 600m startup