Version 4
SHEET 1 1556 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 1376 -32 1056 -32
WIRE 816 16 816 -32
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 512 112 512 48
WIRE 560 112 512 112
WIRE 976 112 976 16
WIRE 976 112 944 112
WIRE 1088 112 1088 -80
WIRE 304 192 288 192
WIRE 448 192 384 192
WIRE 560 192 512 192
WIRE 1040 192 944 192
WIRE 384 272 368 272
WIRE 496 272 464 272
WIRE 560 272 496 272
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 1296 272 1136 272
WIRE 1136 320 1136 272
WIRE 1296 336 1296 272
WIRE 288 352 288 192
WIRE 320 352 288 352
WIRE 496 352 496 272
WIRE 496 352 400 352
WIRE 560 352 496 352
WIRE 1040 352 944 352
WIRE 384 432 352 432
WIRE 464 432 448 432
WIRE 560 432 544 432
WIRE 1088 432 1088 368
WIRE 1088 432 944 432
WIRE 1136 432 1136 384
WIRE 1136 432 1088 432
WIRE 1088 448 1088 432
WIRE 560 512 528 512
WIRE 992 512 944 512
WIRE 1296 512 1296 416
WIRE 1296 512 992 512
WIRE 752 576 752 560
WIRE 288 608 288 352
WIRE 288 608 224 608
WIRE 528 608 528 512
WIRE 528 608 288 608
WIRE 656 608 528 608
WIRE 832 608 656 608
WIRE 992 608 992 512
WIRE 992 608 912 608
WIRE 224 624 224 608
WIRE 528 624 528 608
WIRE 656 656 656 608
WIRE 1376 656 1376 -32
WIRE 1376 656 656 656
WIRE 224 720 224 704
WIRE 528 720 528 688
FLAG 1088 448 0
FLAG 352 432 0
FLAG 752 576 0
FLAG 368 272 0
FLAG 528 720 0
FLAG 224 720 0
FLAG 400 32 0
FLAG 224 608 OUT
FLAG 400 -80 IN
SYMBOL PowerProducts\\LT3800 752 304 R0
SYMATTR InstName U1
SYMBOL nmos 1040 112 R0
SYMATTR InstName Q1
SYMATTR Value Si4886DY
SYMBOL nmos 1040 272 R0
WINDOW 0 -2 31 Right 2
WINDOW 3 38 104 Right 2
SYMATTR InstName Q2
SYMATTR Value Si4886DY
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 82.5K
SYMBOL cap 448 416 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 680p
SYMBOL schottky 1120 384 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 ind 1280 320 R0
SYMATTR InstName L1
SYMATTR Value 15µ
SYMATTR SpiceLine Rpar=2K
SYMBOL res 928 592 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 15m
SYMBOL res 480 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 20K
SYMBOL res 416 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 174K
SYMBOL res 400 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 200K
SYMBOL cap 512 176 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value {.0015µ/10}
SYMBOL cap 512 624 R0
SYMATTR InstName C4
SYMATTR Value 100µ
SYMBOL res 208 608 R0
SYMATTR InstName Rload
SYMATTR Value 10
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
TEXT 920 688 Left 2 !.tran 1.5m startup