Version 4
SHEET 1 1852 804
WIRE 512 -80 400 -80
WIRE 688 -80 512 -80
WIRE 1088 -80 688 -80
WIRE 400 -64 400 -80
WIRE 512 -32 512 -80
WIRE 992 -32 816 -32
WIRE 1392 -32 1056 -32
WIRE 736 16 720 16
WIRE 816 16 816 -32
WIRE 816 16 800 16
WIRE 864 16 816 16
WIRE 976 16 928 16
WIRE 400 32 400 16
WIRE 688 64 688 -80
WIRE 816 64 816 16
WIRE 416 112 400 112
WIRE 512 112 512 48
WIRE 512 112 496 112
WIRE 560 112 512 112
WIRE 976 112 976 16
WIRE 976 112 944 112
WIRE 1088 112 1088 -80
WIRE 464 192 432 192
WIRE 560 192 528 192
WIRE 1040 192 944 192
WIRE 560 272 528 272
WIRE 976 272 976 176
WIRE 976 272 944 272
WIRE 1088 272 1088 208
WIRE 1088 272 976 272
WIRE 1136 272 1088 272
WIRE 1184 272 1136 272
WIRE 1280 272 1264 272
WIRE 1296 272 1280 272
WIRE 1392 272 1392 -32
WIRE 1392 272 1376 272
WIRE 1440 272 1392 272
WIRE 1536 272 1440 272
WIRE 1440 288 1440 272
WIRE 1536 288 1536 272
WIRE 1136 304 1136 272
WIRE 464 352 432 352
WIRE 560 352 544 352
WIRE 1040 352 944 352
WIRE 1088 384 1088 368
WIRE 1136 384 1136 368
WIRE 1440 384 1440 352
WIRE 1536 384 1536 368
WIRE 384 432 368 432
WIRE 464 432 448 432
WIRE 560 432 544 432
WIRE 1280 432 1280 272
WIRE 1280 432 944 432
WIRE 560 512 528 512
WIRE 1392 512 1392 272
WIRE 1392 512 944 512
WIRE 688 576 688 560
WIRE 816 576 816 560
WIRE 416 608 400 608
WIRE 528 608 528 512
WIRE 528 608 496 608
WIRE 992 608 528 608
WIRE 1392 608 1392 512
WIRE 1392 608 1072 608
FLAG 1088 384 0
FLAG 368 432 0
FLAG 816 576 0
FLAG 1440 384 0
FLAG 1536 384 0
FLAG 400 32 0
FLAG 1536 272 OUT
FLAG 400 -80 IN
FLAG 1136 384 0
FLAG 688 576 0
FLAG 432 192 0
FLAG 528 272 0
FLAG 432 352 0
FLAG 400 608 0
FLAG 720 16 0
FLAG 400 112 0
SYMBOL nmos 1040 112 R0
SYMATTR InstName Q1
SYMATTR Value Si7370DP
SYMBOL nmos 1040 272 R0
WINDOW 0 -2 31 Right 2
WINDOW 3 38 104 Right 2
SYMATTR InstName Q2
SYMATTR Value Si7370DP
SYMBOL schottky 864 32 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MBRS140
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 960 112 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL res 496 -48 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 560 416 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 20K
SYMBOL cap 448 416 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 2200p
SYMBOL schottky 1120 368 M180
WINDOW 0 24 72 Left 2
WINDOW 3 20 1 Left 2
SYMATTR InstName D2
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind 1168 288 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 15µ
SYMATTR SpiceLine Rpar=2K
SYMBOL res 1280 288 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10m
SYMBOL res 560 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 49.9K
SYMBOL cap 528 176 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value .002µ
SYMBOL cap 1424 288 R0
SYMATTR InstName C4
SYMATTR Value 100µ
SYMBOL voltage 400 -80 R0
WINDOW 3 25 101 Left 2
SYMATTR Value 36
SYMATTR InstName V1
SYMBOL diode 1056 -48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL PowerProducts\\LT3845 752 304 R0
SYMATTR InstName U1
SYMBOL res 976 624 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 143K
SYMBOL res 400 624 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 16.2K
SYMBOL cap 800 0 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 1µ
SYMBOL res 512 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 82.5K
SYMBOL res 1520 272 R0
SYMATTR InstName Rload
SYMATTR Value 2
TEXT 1440 464 Left 2 !.tran 2m startup