Version 4
SHEET 1 1764 680
WIRE 352 0 272 0
WIRE 912 0 432 0
WIRE 272 32 272 0
WIRE 912 48 912 0
WIRE 960 128 912 128
WIRE 304 160 112 160
WIRE 912 160 528 160
WIRE 960 176 960 128
WIRE 992 176 960 176
WIRE 112 192 112 160
WIRE 992 192 992 176
WIRE 304 240 240 240
WIRE 592 240 528 240
WIRE 672 240 592 240
WIRE 592 256 592 240
WIRE 240 272 240 240
WIRE 912 272 912 160
WIRE 944 272 912 272
WIRE 112 288 112 272
WIRE 304 320 208 320
WIRE 560 320 528 320
WIRE 592 320 560 320
WIRE 992 320 992 288
WIRE 560 336 560 320
WIRE 672 336 672 320
WIRE 208 352 208 320
WIRE 208 448 208 432
FLAG 112 288 0
FLAG 672 336 0
FLAG 208 448 0
FLAG 560 336 0
FLAG 240 272 0
FLAG 272 32 0
FLAG 992 320 0
SYMBOL SpecialFunctions\\LTC6992-1 416 240 R0
SYMATTR InstName U1
SYMBOL voltage 672 224 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 6V
SYMBOL voltage 112 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 0.7V
SYMBOL res 192 336 R0
SYMATTR InstName R1
SYMATTR Value 900K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL cap 576 256 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMATTR SpiceLine V=16 Irms=9.202 Rser=0.004 Lser=0
SYMBOL voltage 448 0 M270
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 400
SYMBOL nmos 944 192 R0
SYMATTR InstName M1
SYMATTR Value STW11NM80
SYMBOL res 896 32 R0
SYMATTR InstName R3
SYMATTR Value 40R
TEXT 80 472 Left 2 !.tran 0 10m 0 startup