Version 4
SHEET 1 1084 680
WIRE 416 -80 32 -80
WIRE 592 -80 512 -80
WIRE 704 -80 592 -80
WIRE 752 -80 704 -80
WIRE 864 -80 832 -80
WIRE 1024 -80 864 -80
WIRE 496 16 496 -32
WIRE 496 16 464 16
WIRE 464 48 464 16
WIRE 864 80 864 -80
WIRE 1024 80 1024 -80
WIRE 704 96 704 -80
WIRE 32 144 32 -80
WIRE 464 208 464 128
WIRE 592 208 592 -80
WIRE 592 208 464 208
WIRE 32 336 32 224
WIRE 704 336 704 160
WIRE 704 336 32 336
WIRE 864 336 864 144
WIRE 864 336 704 336
WIRE 1024 336 1024 160
WIRE 1024 336 864 336
WIRE 32 384 32 336
FLAG 32 384 0
SYMBOL voltage 32 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 19
SYMBOL ind 736 -64 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 5 56 VBottom 0
SYMATTR InstName L1
SYMATTR Value 5.6µH
SYMBOL voltage 464 32 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 0 0 0 10u 11u)
SYMBOL nmos 416 -32 R270
SYMATTR InstName M1
SYMATTR Value BSF024N03LT3
SYMBOL schottky 720 160 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D1
SYMATTR Value MBR735
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 848 80 R0
SYMATTR InstName C1
SYMATTR Value 220µF
SYMBOL res 1008 64 R0
SYMATTR InstName R1
SYMATTR Value 2.6
TEXT -2 408 Left 0 !.tran .005 startup