Version 4
SHEET 1 2312 928
WIRE 432 -96 -304 -96
WIRE -304 -16 -304 -96
WIRE -128 -16 -304 -16
WIRE -48 -16 -128 -16
WIRE 544 -16 400 -16
WIRE 752 -16 544 -16
WIRE -304 0 -304 -16
WIRE 544 0 544 -16
WIRE 752 0 752 -16
WIRE -304 80 -304 64
WIRE -128 80 -128 64
WIRE -48 80 -128 80
WIRE 496 80 400 80
WIRE 752 96 752 80
WIRE 432 176 432 -32
WIRE 432 176 400 176
WIRE 464 176 432 176
WIRE 544 176 544 96
WIRE 544 176 528 176
WIRE 544 272 544 176
WIRE 544 272 400 272
WIRE 720 272 544 272
WIRE 848 272 720 272
WIRE 864 272 848 272
WIRE 960 272 944 272
WIRE 992 272 960 272
WIRE 1120 272 992 272
WIRE 1216 272 1120 272
WIRE 1328 272 1216 272
WIRE 544 288 544 272
WIRE 1216 288 1216 272
WIRE 1328 288 1328 272
WIRE 720 320 720 272
WIRE 992 336 992 272
WIRE 1120 336 1120 272
WIRE -208 368 -256 368
WIRE -48 368 -144 368
WIRE 496 368 400 368
WIRE 1216 384 1216 352
WIRE 1328 384 1328 368
WIRE 544 400 544 384
WIRE 720 400 720 384
WIRE -144 464 -256 464
WIRE -48 464 -80 464
WIRE 992 464 992 416
WIRE 992 464 400 464
WIRE 1120 464 1120 400
WIRE 1120 464 992 464
WIRE 992 480 992 464
WIRE -240 560 -256 560
WIRE -48 560 -176 560
WIRE 448 560 400 560
WIRE 592 560 448 560
WIRE 848 560 848 272
WIRE 848 560 672 560
WIRE 448 576 448 560
WIRE 992 576 992 560
WIRE -48 656 -80 656
WIRE 448 656 448 640
WIRE 448 656 400 656
WIRE 960 656 960 272
WIRE 960 656 448 656
FLAG -80 656 0
FLAG 544 400 0
FLAG 1216 384 0
FLAG 1328 384 0
FLAG 992 576 0
FLAG 1328 272 OUT
FLAG -304 80 0
FLAG -256 560 0
FLAG -256 368 0
FLAG 752 96 0
FLAG 720 400 0
FLAG 752 -16 IN
FLAG -256 464 0
SYMBOL nmos 496 0 R0
SYMATTR InstName Q1
SYMATTR Value STD30NF06L
SYMBOL ind 848 288 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value .68µ
SYMATTR SpiceLine Rser=1.5m
SYMBOL cap 1200 288 R0
WINDOW 39 24 92 Left 2
SYMATTR InstName C1
SYMATTR Value 660µ
SYMBOL res 976 320 R0
SYMATTR InstName R1
SYMATTR Value 62.5K
SYMBOL res 976 464 R0
SYMATTR InstName R2
SYMATTR Value 20K
SYMBOL cap 464 192 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value .1µ
SYMBOL cap -320 0 R0
SYMATTR InstName C3
SYMATTR Value 4.7µ
SYMBOL cap -176 544 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
WINDOW 39 61 34 VTop 2
SYMATTR InstName C4
SYMATTR Value 3300p
SYMATTR SpiceLine Rser=1K Cpar=100p
SYMBOL cap -144 352 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value .002µ
SYMBOL voltage 752 -16 R0
WINDOW 3 20 93 Left 2
SYMATTR Value 12
SYMATTR InstName V1
SYMBOL schottky 416 -96 R0
WINDOW 3 22 63 Left 2
SYMATTR Value CMDSH2-3
SYMATTR InstName D1
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 496 288 R0
SYMATTR InstName Q2
SYMATTR Value STD30NF06L
SYMBOL cap 1104 336 R0
SYMATTR InstName C6
SYMATTR Value 47p
SYMBOL schottky 704 384 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value MBRS340
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 688 544 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL cap 432 576 R0
WINDOW 3 41 35 Left 2
WINDOW 39 27 61 Left 2
SYMATTR Value .22µ
SYMATTR SpiceLine Rpar=13K
SYMATTR InstName C7
SYMBOL cap -80 448 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
WINDOW 39 59 33 VTop 2
SYMATTR InstName C8
SYMATTR Value .1µ
SYMATTR SpiceLine Rpar=80K
SYMBOL res 1312 272 R0
SYMATTR InstName Rload
SYMATTR Value .22
SYMBOL PowerProducts\\LTC3851-1 176 320 R0
SYMATTR InstName U1
SYMBOL res -144 -32 R0
SYMATTR InstName R4
SYMATTR Value 100K
TEXT 1048 664 Left 2 !.tran 2m startup