Version 4
SHEET 1 1572 756
WIRE 1152 -96 256 -96
WIRE 256 -64 256 -96
WIRE 544 -64 384 -64
WIRE 800 -64 544 -64
WIRE 912 -64 800 -64
WIRE 992 -64 912 -64
WIRE 384 -48 384 -64
WIRE 544 -48 544 -64
WIRE 992 -48 992 -64
WIRE 800 -32 800 -64
WIRE 544 48 544 32
WIRE 752 48 544 48
WIRE 992 48 992 32
WIRE 800 64 240 64
WIRE 384 80 384 32
WIRE 544 80 544 48
WIRE 256 144 256 16
WIRE 272 144 256 144
WIRE 688 144 656 144
WIRE 704 144 688 144
WIRE 800 144 800 64
WIRE 800 144 768 144
WIRE 912 160 912 -64
WIRE 240 240 240 64
WIRE 272 240 240 240
WIRE 864 240 656 240
WIRE 688 256 688 144
WIRE 240 336 240 240
WIRE 272 336 240 336
WIRE 688 336 688 320
WIRE 688 336 656 336
WIRE 912 336 912 256
WIRE 912 336 688 336
WIRE 960 336 912 336
WIRE 1008 336 960 336
WIRE 1152 336 1152 -96
WIRE 1152 336 1088 336
WIRE 1232 336 1152 336
WIRE 1408 336 1232 336
WIRE 1232 352 1232 336
WIRE 1408 352 1408 336
WIRE 960 368 960 336
WIRE 800 384 800 144
WIRE 800 384 736 384
WIRE 800 400 800 384
WIRE 192 432 176 432
WIRE 272 432 256 432
WIRE 736 432 736 384
WIRE 736 432 656 432
WIRE 960 448 960 432
WIRE 1152 448 1152 336
WIRE 1152 448 1088 448
WIRE 1232 448 1232 416
WIRE 1408 448 1408 432
WIRE 1152 464 1152 448
WIRE 800 480 800 464
WIRE 272 528 112 528
WIRE 1088 528 1088 448
WIRE 1088 528 656 528
WIRE 112 544 112 528
WIRE 912 544 912 336
WIRE 1152 576 1152 544
WIRE 1152 576 1072 576
WIRE 1152 592 1152 576
WIRE 112 624 112 608
WIRE 272 624 112 624
WIRE 864 624 656 624
WIRE 912 656 912 640
WIRE 1152 688 1152 672
WIRE 384 704 384 688
WIRE 544 704 544 688
WIRE 112 736 112 624
WIRE 1072 736 1072 576
WIRE 1072 736 112 736
FLAG 912 656 0
FLAG 800 480 0
FLAG 960 448 0
FLAG 544 704 0
FLAG 384 704 0
FLAG 1152 688 0
FLAG 1232 448 0
FLAG 1408 448 0
FLAG 176 432 0
FLAG 992 48 0
FLAG 1408 336 OUT
FLAG 992 -64 IN
SYMBOL PowerProducts\\LTC3812-5 464 384 R0
SYMATTR InstName U1
SYMBOL res 368 -64 R0
SYMATTR InstName R1
SYMATTR Value 110K
SYMBOL nmos 752 -32 R0
SYMATTR InstName Q1
SYMATTR Value BSH114
SYMBOL res 528 -64 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL diode 768 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL cap 672 256 R0
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL nmos 864 160 R0
SYMATTR InstName Q2
SYMATTR Value Si7850DP
SYMBOL nmos 864 544 R0
SYMATTR InstName Q3
SYMATTR Value Si7850DP
SYMBOL cap 784 400 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL ind 992 352 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 4.7µ
SYMBOL schottky 944 432 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 1136 448 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 1136 576 R0
SYMATTR InstName R4
SYMATTR Value 1.89K
SYMBOL cap 1216 352 R0
WINDOW 39 27 73 Left 2
WINDOW 3 40 39 Left 2
SYMATTR SpiceLine Rser=10m
SYMATTR Value 270µ
SYMATTR InstName C3
SYMBOL cap 96 544 R0
WINDOW 39 23 57 Left 2
WINDOW 40 24 98 Left 2
WINDOW 3 43 33 Left 2
SYMATTR SpiceLine Rser=200K
SYMATTR SpiceLine2 Cpar=5p
SYMATTR InstName C4
SYMATTR Value 47p
SYMBOL cap 256 416 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res 240 -80 R0
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL voltage 992 -64 R0
SYMATTR InstName V1
SYMATTR Value 42
SYMBOL res 1392 336 R0
SYMATTR InstName Rload
SYMATTR Value 2
TEXT 1232 544 Left 2 !.tran 2m startup