Version 4
SHEET 1 880 680
WIRE 336 0 -48 0
WIRE -48 16 -48 0
WIRE -48 112 -48 96
WIRE 32 112 -48 112
WIRE 336 112 336 0
WIRE 336 112 256 112
WIRE 544 112 336 112
WIRE 544 128 544 112
WIRE 32 192 0 192
WIRE 336 192 336 112
WIRE 544 224 544 208
WIRE 32 272 -176 272
WIRE 288 272 256 272
WIRE -176 288 -176 272
WIRE 336 320 336 288
WIRE -176 384 -176 368
WIRE 336 416 336 400
FLAG 544 224 0
FLAG 0 192 0
FLAG -176 384 0
FLAG 336 416 0
SYMBOL voltage 544 112 R0
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL voltage -176 272 R0
SYMATTR Value PULSE(0 3 0 100n 100n 2.5m 5m)
SYMATTR InstName V2
SYMBOL nmos 288 192 R0
WINDOW 3 53 80 Left 2
SYMATTR Value Si4838DY
SYMATTR InstName Q1
SYMBOL res 352 416 R180
WINDOW 0 -35 89 Left 2
WINDOW 3 -33 43 Left 2
SYMATTR InstName R1
SYMATTR Value 10
SYMBOL LTC1981 144 192 R0
SYMATTR InstName U1
SYMBOL res -64 0 R0
SYMATTR InstName R2
SYMATTR Value 100K
TEXT 440 352 Left 2 !.tran 20m startup