Version 4
SHEET 1 1704 908
WIRE 416 -96 -48 -96
WIRE 576 -96 416 -96
WIRE 640 -96 576 -96
WIRE 768 -96 720 -96
WIRE 576 -64 576 -96
WIRE 576 -48 576 -64
WIRE 576 16 576 0
WIRE -48 48 -48 -96
WIRE -32 48 -48 48
WIRE 496 48 288 48
WIRE 768 48 768 -96
WIRE 768 48 496 48
WIRE 768 64 768 48
WIRE -128 128 -144 128
WIRE -32 128 -48 128
WIRE 320 128 288 128
WIRE 336 128 320 128
WIRE 416 128 416 -96
WIRE 416 128 400 128
WIRE 496 128 496 48
WIRE 768 160 768 144
WIRE -224 208 -288 208
WIRE -112 208 -144 208
WIRE -32 208 -112 208
WIRE 448 208 288 208
WIRE 320 224 320 128
WIRE -384 288 -400 288
WIRE -288 288 -288 272
WIRE -288 288 -304 288
WIRE -112 288 -112 272
WIRE -112 288 -288 288
WIRE -32 288 -112 288
WIRE 320 288 288 288
WIRE 496 288 496 224
WIRE 496 288 320 288
WIRE 528 288 496 288
WIRE 656 288 608 288
WIRE 752 288 656 288
WIRE 848 288 752 288
WIRE 928 288 848 288
WIRE 1008 288 928 288
WIRE 848 304 848 288
WIRE 928 304 928 288
WIRE 656 336 656 288
WIRE 752 352 752 288
WIRE -144 368 -160 368
WIRE -32 368 -64 368
WIRE 336 368 288 368
WIRE 416 368 416 128
WIRE 416 368 336 368
WIRE 1008 368 1008 288
WIRE 496 400 496 288
WIRE 528 400 496 400
WIRE 848 400 848 368
WIRE 928 400 928 368
WIRE -32 448 -48 448
WIRE 304 448 288 448
WIRE 496 448 496 400
WIRE 304 480 304 448
WIRE 416 480 416 368
WIRE 416 480 304 480
WIRE 656 512 656 480
WIRE 704 512 656 512
WIRE 752 512 752 432
WIRE 752 512 704 512
WIRE 816 512 752 512
WIRE -144 528 -160 528
WIRE -32 528 -80 528
WIRE 448 528 288 528
WIRE 1008 528 1008 432
WIRE 704 544 704 512
WIRE 816 544 816 512
WIRE 496 560 496 544
WIRE -32 608 -48 608
WIRE 304 608 288 608
WIRE 1008 608 1008 592
WIRE -288 656 -288 288
WIRE 704 656 704 624
WIRE 704 656 -288 656
WIRE 816 656 816 608
WIRE 816 656 704 656
FLAG 768 160 0
FLAG 496 560 0
FLAG 304 608 0
FLAG -48 608 0
FLAG 848 400 0
FLAG 1008 608 0
FLAG -160 368 0
FLAG -144 128 0
FLAG -160 528 0
FLAG -48 448 0
FLAG -400 288 0
FLAG 768 48 IN
FLAG 928 400 0
FLAG 336 432 0
FLAG 576 16 0
FLAG 592 400 0
SYMBOL PowerProducts\\LTC3703 128 336 R0
SYMATTR InstName U1
SYMBOL nmos 448 128 R0
SYMATTR InstName Q1
SYMATTR Value BSC077N12NS3
SYMBOL nmos 448 448 R0
SYMATTR InstName Q2
SYMATTR Value BSC077N12NS3
SYMBOL voltage 768 48 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 17
SYMBOL ind 512 304 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 10µ
SYMATTR SpiceLine Ipk=20 Rser=0.019 Rpar=0 Cpar=0
SYMBOL cap 832 304 R0
SYMATTR Value 270µ
SYMATTR SpiceLine Rser=10m
SYMATTR InstName C1
SYMBOL res -48 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res -32 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 25k
SYMBOL res -128 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL cap -304 208 R0
WINDOW 0 30 21 Left 2
WINDOW 3 28 56 Left 2
SYMATTR InstName C2
SYMATTR Value 2200p
SYMBOL cap -80 512 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value .001µ
SYMBOL cap 304 224 R0
WINDOW 0 30 5 Left 2
WINDOW 3 37 44 Left 2
SYMATTR InstName C4
SYMATTR Value .1µ
SYMBOL schottky 592 416 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap -128 208 R0
WINDOW 0 35 21 Left 2
WINDOW 3 28 56 Left 2
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL schottky 400 144 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 736 448 M180
WINDOW 0 36 76 Left 2
WINDOW 3 26 48 Left 2
SYMATTR InstName R4
SYMATTR Value 365K
SYMBOL cap 800 544 R0
WINDOW 39 24 92 Left 2
SYMATTR SpiceLine Rser=100
SYMATTR InstName C6
SYMATTR Value 2200p
SYMBOL res -288 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 21.5K
SYMBOL res 688 528 R0
SYMATTR InstName R6
SYMATTR Value 8.06k
SYMBOL res 640 320 R0
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL cap 640 416 R0
SYMATTR InstName C7
SYMATTR Value 2200p
SYMBOL schottky 992 368 R0
SYMATTR InstName D3
SYMBOL cap 912 304 R0
SYMATTR InstName C9
SYMATTR Value 100nf
SYMBOL cap 320 368 R0
SYMATTR InstName C10
SYMATTR Value 100nf
SYMBOL zener 592 0 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMATTR Value BZX84C12L
SYMBOL res 624 -80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R8
SYMATTR Value 200
SYMBOL load 992 528 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value SFFM(1 20 0.2ms 0.2ms 0.2ms)
TEXT 744 456 Left 2 !.tran 10m startup