Version 4
SHEET 1 1568 724
WIRE -208 -16 -288 -16
WIRE -48 -16 -208 -16
WIRE 192 -16 -48 -16
WIRE 528 -16 192 -16
WIRE 656 -16 576 -16
WIRE 752 -16 720 -16
WIRE 864 -16 752 -16
WIRE -288 0 -288 -16
WIRE -48 0 -48 -16
WIRE 528 0 528 -16
WIRE 576 0 576 -16
WIRE 864 0 864 -16
WIRE 752 16 752 -16
WIRE 192 32 192 -16
WIRE -208 64 -208 48
WIRE -288 96 -288 80
WIRE -144 96 -160 96
WIRE -48 96 -48 80
WIRE -48 96 -64 96
WIRE 32 96 -48 96
WIRE 384 96 352 96
WIRE 528 96 528 80
WIRE 528 96 464 96
WIRE 576 96 576 80
WIRE 752 96 752 80
WIRE 864 96 864 80
WIRE 528 160 528 96
WIRE 688 160 528 160
WIRE 864 160 688 160
WIRE -96 176 -160 176
WIRE 32 176 -16 176
WIRE 368 176 352 176
WIRE 464 176 448 176
WIRE 528 176 528 160
WIRE 688 192 688 160
WIRE 864 192 864 160
WIRE -144 256 -160 256
WIRE -48 256 -64 256
WIRE 32 256 16 256
WIRE 464 256 352 256
WIRE 480 256 464 256
WIRE 464 304 464 256
WIRE 640 304 640 272
WIRE 640 304 464 304
WIRE 816 304 816 272
WIRE 816 304 640 304
WIRE -96 336 -160 336
WIRE 32 336 -32 336
WIRE 528 336 528 272
WIRE 528 336 352 336
WIRE 688 336 688 288
WIRE 688 336 528 336
WIRE 864 336 864 288
WIRE 864 336 688 336
WIRE 528 352 528 336
WIRE 128 416 128 400
WIRE 256 416 256 400
WIRE 528 448 528 432
WIRE 256 496 256 480
FLAG -160 336 0
FLAG -160 256 0
FLAG -160 176 0
FLAG -288 96 0
FLAG 256 496 0
FLAG 464 176 0
FLAG 752 96 0
FLAG 576 96 0
FLAG 864 96 0
FLAG -288 -16 IN
FLAG 864 -16 OUT
FLAG -160 96 0
FLAG 128 416 0
FLAG 528 448 0
FLAG -208 64 0
SYMBOL res 0 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 56.2K
SYMBOL voltage -288 -16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap 16 240 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 4700p
SYMBOL cap 240 480 M180
WINDOW 0 24 64 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C2
SYMATTR Value 4.7µ
SYMBOL res 480 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 243K
SYMBOL res 352 192 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 6.04K
SYMBOL ind2 512 -16 R0
WINDOW 0 0 40 Right 2
WINDOW 3 0 72 Right 2
SYMATTR InstName L1
SYMATTR Value 1µ
SYMATTR Type ind
SYMATTR SpiceLine Rpar=250K
SYMBOL ind2 592 96 R180
WINDOW 0 3 79 Right 2
WINDOW 3 1 44 Right 2
SYMATTR InstName L2
SYMATTR Value 1µ
SYMATTR Type ind
SYMATTR SpiceLine Rpar=250K
SYMBOL cap 736 16 R0
SYMATTR InstName C3
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=5m
SYMBOL schottky 656 0 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 30BQ060
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -48 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 22K
SYMBOL cap -32 352 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C4
SYMATTR Value 2000p
SYMBOL res -64 -16 R0
WINDOW 3 24 81 Left 2
SYMATTR Value 60k
SYMATTR InstName R5
SYMBOL res -48 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 15.4K
SYMBOL PowerProducts\\LT3748 192 208 R0
SYMATTR InstName U1
SYMBOL res 512 336 R0
SYMATTR InstName R7
SYMATTR Value 0.002
SYMBOL res 848 -16 R0
SYMATTR InstName Rload
SYMATTR Value 6
SYMBOL nmos 480 176 R0
SYMATTR InstName M1
SYMATTR Value IRFP250N
SYMBOL nmos 640 192 R0
SYMATTR InstName M2
SYMATTR Value IRFP250N
SYMBOL nmos 816 192 R0
SYMATTR InstName M3
SYMATTR Value IRFP250N
SYMBOL cap -224 -16 R0
SYMATTR InstName C5
SYMATTR Value 10n
TEXT 552 -16 Bottom 2 !K1 L1 L2 1
TEXT 672 424 Left 2 !.tran 1.5m startup