Version 4
SHEET 1 1852 804
WIRE 352 -80 240 -80
WIRE 752 -80 352 -80
WIRE 1136 -80 752 -80
WIRE 240 -64 240 -80
WIRE 352 -64 352 -80
WIRE 752 -16 752 -80
WIRE 1216 -16 992 -16
WIRE 1376 -16 1280 -16
WIRE 240 32 240 16
WIRE 352 32 352 16
WIRE 560 32 352 32
WIRE 992 32 992 -16
WIRE 992 32 944 32
WIRE 1024 32 992 32
WIRE 352 48 352 32
WIRE 992 48 992 32
WIRE 480 128 464 128
WIRE 560 128 544 128
WIRE 992 128 992 112
WIRE 992 128 944 128
WIRE 352 144 352 128
WIRE 992 144 992 128
WIRE 1136 144 1136 -80
WIRE 560 224 528 224
WIRE 1088 224 944 224
WIRE 448 320 432 320
WIRE 560 320 528 320
WIRE 992 320 992 208
WIRE 992 320 944 320
WIRE 1088 320 992 320
WIRE 1136 320 1136 240
WIRE 1136 320 1088 320
WIRE 1168 320 1136 320
WIRE 1264 320 1248 320
WIRE 1280 320 1264 320
WIRE 1376 320 1376 -16
WIRE 1376 320 1360 320
WIRE 1424 320 1376 320
WIRE 1520 320 1424 320
WIRE 1424 336 1424 320
WIRE 1520 336 1520 320
WIRE 1088 352 1088 320
WIRE 448 416 432 416
WIRE 560 416 512 416
WIRE 992 416 944 416
WIRE 1088 432 1088 416
WIRE 1424 432 1424 400
WIRE 1520 432 1520 416
WIRE 992 464 992 416
WIRE 1264 464 1264 320
WIRE 1264 464 992 464
WIRE 560 512 528 512
WIRE 1376 512 1376 320
WIRE 1376 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 1200 608 528 608
WIRE 1376 608 1376 512
WIRE 1376 608 1280 608
FLAG 432 416 0
FLAG 816 576 0
FLAG 1424 432 0
FLAG 1520 432 0
FLAG 240 32 0
FLAG 1520 320 OUT
FLAG 240 -80 IN
FLAG 1088 432 0
FLAG 688 576 0
FLAG 464 128 0
FLAG 528 224 0
FLAG 432 320 0
FLAG 400 608 0
FLAG 1088 32 0
FLAG 352 144 0
SYMBOL nmos 1088 144 R0
SYMATTR InstName Q1
SYMATTR Value Si7850DP
SYMBOL schottky 976 48 R0
WINDOW 0 24 3 Left 2
WINDOW 3 25 68 Left 2
SYMATTR InstName D1
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 976 144 R0
WINDOW 3 24 54 Left 2
SYMATTR Value .22µ
SYMATTR InstName C1
SYMBOL res 336 -80 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL cap 512 400 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
WINDOW 39 62 73 VTop 2
SYMATTR InstName C2
SYMATTR Value 680p
SYMATTR SpiceLine Rser=10K Cpar=120p
SYMBOL schottky 1072 416 M180
WINDOW 0 31 67 Left 2
WINDOW 3 20 1 Left 2
SYMATTR InstName D2
SYMATTR Value PDS760
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind 1152 336 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 10µ
SYMBOL res 1264 336 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 15m
SYMBOL res 544 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 49.9K
SYMBOL cap 544 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL cap 1408 336 R0
SYMATTR InstName C4
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=50m
SYMBOL voltage 240 -80 R0
WINDOW 3 25 101 Left 2
SYMATTR Value 48
SYMATTR InstName V1
SYMBOL diode 1280 -32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL res 1184 624 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 130K
SYMBOL res 400 624 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 14.7K
SYMBOL cap 1024 16 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 1µ
SYMBOL res 336 32 R0
SYMATTR InstName R7
SYMATTR Value 82.5K
SYMBOL res 1504 320 R0
SYMATTR InstName Rload
SYMATTR Value 2.9
SYMBOL PowerProducts\\LT3844 752 272 R0
SYMATTR InstName U1
TEXT 1416 536 Left 2 !.tran 1m startup