Version 4
SHEET 1 880 680
WIRE 272 16 160 16
WIRE 352 16 272 16
WIRE 496 16 416 16
WIRE 272 32 272 16
WIRE -96 64 -192 64
WIRE 32 64 -96 64
WIRE -192 80 -192 64
WIRE 32 96 32 64
WIRE 160 96 160 16
WIRE 272 112 272 96
WIRE 336 112 272 112
WIRE 400 112 336 112
WIRE 496 112 496 16
WIRE 496 112 480 112
WIRE 544 112 496 112
WIRE 640 112 544 112
WIRE 336 128 336 112
WIRE 544 128 544 112
WIRE 640 128 640 112
WIRE -96 160 -96 64
WIRE -64 160 -96 160
WIRE 272 160 272 112
WIRE 272 160 256 160
WIRE -192 176 -192 160
WIRE 336 208 336 192
WIRE 544 224 544 192
WIRE 640 224 640 208
WIRE 304 240 256 240
WIRE 416 240 304 240
WIRE 496 240 496 112
WIRE 496 240 416 240
WIRE 304 256 304 240
WIRE 496 272 496 240
WIRE 416 288 416 240
WIRE 304 320 256 320
WIRE -240 400 -256 400
WIRE -144 400 -160 400
WIRE -64 400 -80 400
WIRE 416 400 416 352
WIRE 416 400 256 400
WIRE 496 400 496 352
WIRE 496 400 416 400
WIRE 496 416 496 400
WIRE 96 480 96 464
WIRE 496 512 496 496
FLAG 336 208 0
FLAG 544 224 0
FLAG 496 512 0
FLAG -256 400 0
FLAG -192 176 0
FLAG 96 480 0
FLAG 640 224 0
FLAG -192 64 IN
FLAG 640 112 OUT
SYMBOL PowerProducts\\LT3437 96 320 R0
SYMATTR InstName U1
SYMBOL ind 384 128 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 68µ
SYMBOL schottky 320 192 M180
WINDOW 0 23 58 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL diode 416 32 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL cap 528 128 R0
SYMATTR InstName C1
SYMATTR Value 50µ
SYMBOL voltage -192 64 R0
SYMATTR InstName V1
SYMATTR Value 40
SYMBOL res 480 256 R0
SYMATTR InstName R1
SYMATTR Value 165K
SYMBOL res 480 400 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL cap 288 256 R0
SYMATTR InstName C2
SYMATTR Value .1µ
SYMBOL cap -80 384 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1500p
SYMBOL res -144 384 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL cap 400 288 R0
SYMATTR InstName C4
SYMATTR Value 27p
SYMBOL cap 256 32 R0
SYMATTR InstName C5
SYMATTR Value .1µ
SYMBOL res 624 112 R0
SYMATTR InstName Rload
SYMATTR Value 13.2
TEXT 192 488 Left 2 !.tran 3m startup