Version 4
SHEET 1 880 680
WIRE 288 -48 240 -48
WIRE 400 -48 352 -48
WIRE 240 16 240 -48
WIRE 80 64 -16 64
WIRE 112 64 80 64
WIRE 400 64 400 -48
WIRE 400 64 368 64
WIRE 496 64 400 64
WIRE 592 64 560 64
WIRE -16 80 -16 64
WIRE 400 80 400 64
WIRE -16 176 -16 160
WIRE 80 176 80 64
WIRE 112 176 80 176
WIRE 400 176 400 160
WIRE 400 176 368 176
WIRE 400 272 368 272
WIRE 512 272 400 272
WIRE 608 272 512 272
WIRE 400 288 400 272
WIRE 512 288 512 272
WIRE 608 288 608 272
WIRE 16 384 0 384
WIRE 112 384 96 384
WIRE 400 384 400 368
WIRE 400 384 368 384
WIRE 512 384 512 352
WIRE 608 384 608 368
WIRE 400 400 400 384
WIRE 240 448 240 432
WIRE 400 496 400 480
FLAG 240 448 0
FLAG 400 496 0
FLAG 592 64 0
FLAG 512 384 0
FLAG -16 176 0
FLAG 0 384 0
FLAG 608 384 0
FLAG -16 64 IN
FLAG 608 272 OUT
SYMBOL PowerProducts\\LT3663 240 224 R0
SYMATTR InstName U1
SYMBOL res 384 272 R0
SYMATTR InstName R1
SYMATTR Value 59K
SYMBOL res 384 384 R0
SYMATTR InstName R2
SYMATTR Value 11K
SYMBOL ind 384 64 R0
SYMATTR InstName L1
SYMATTR Value 6.8µ
SYMBOL schottky 560 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value MBRS140
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 352 -64 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL cap 496 288 R0
SYMATTR InstName C2
SYMATTR Value 22µ
SYMBOL voltage -16 64 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res 112 368 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 28.7K
SYMBOL res 592 272 R0
SYMATTR InstName R4
SYMATTR Value 5
TEXT 512 448 Left 2 !.tran 500u startup