Version 4 SHEET 1 2204 980 WIRE 288 -96 112 -96 WIRE 352 -96 288 -96 WIRE 480 -96 432 -96 WIRE 528 -96 480 -96 WIRE 576 -96 528 -96 WIRE 720 -96 672 -96 WIRE 880 -96 720 -96 WIRE 288 -80 288 -96 WIRE 720 -80 720 -96 WIRE 880 -80 880 -96 WIRE 528 -64 528 -96 WIRE 288 16 288 0 WIRE 720 16 720 -16 WIRE 880 16 880 0 WIRE 528 32 528 0 WIRE -384 64 -480 64 WIRE -208 64 -384 64 WIRE 112 64 112 -96 WIRE 112 64 -208 64 WIRE 128 64 112 64 WIRE 480 64 480 -96 WIRE 480 64 448 64 WIRE -480 80 -480 64 WIRE -384 80 -384 64 WIRE -208 80 -208 64 WIRE -480 176 -480 160 WIRE -384 176 -384 144 WIRE -208 176 -208 160 WIRE -208 176 -384 176 WIRE -64 176 -80 176 WIRE 128 176 16 176 WIRE 480 176 448 176 WIRE 480 192 480 176 WIRE -384 240 -384 176 WIRE -208 240 -384 240 WIRE -208 256 -208 240 WIRE 0 288 -96 288 WIRE 32 288 0 288 WIRE 128 288 112 288 WIRE 480 288 480 272 WIRE 480 288 448 288 WIRE -96 304 -96 288 WIRE 0 304 0 288 WIRE 480 304 480 288 WIRE -208 368 -208 336 WIRE -96 400 -96 384 WIRE 0 400 0 384 WIRE 128 400 0 400 WIRE 480 400 480 384 WIRE 480 400 448 400 WIRE 480 416 480 400 WIRE 0 448 0 400 WIRE 0 448 -160 448 WIRE 288 464 288 448 WIRE -208 480 -208 464 WIRE 480 512 480 496 WIRE -384 544 -384 240 WIRE 592 544 592 -48 WIRE 592 544 -384 544 FLAG 288 464 0 FLAG -480 176 0 FLAG -80 176 0 FLAG 880 16 0 FLAG 480 512 0 FLAG -208 480 0 FLAG -96 400 0 FLAG 720 16 0 FLAG 528 32 0 SYMBOL voltage -480 64 R0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL res 272 -96 R0 SYMATTR InstName R1 SYMATTR Value 100 SYMBOL voltage 32 176 R90 WINDOW 123 74 56 VTop 2 WINDOW 39 53 56 VTop 2 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName V2 SYMATTR Value PULSE(5 0 1n 5n 5n 4u) SYMBOL res 336 -80 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R2 SYMATTR Value .1 SYMBOL LT6109-2 288 224 R0 SYMATTR InstName U1 SYMBOL pmos 672 -48 M270 WINDOW 0 54 44 VTop 2 WINDOW 3 -11 71 VLeft 2 SYMATTR InstName Q1 SYMATTR Value IRF9640 SYMBOL current 880 -80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName I1 SYMATTR Value PWL(20u 0 40u 500m) SYMBOL res 464 176 R0 SYMATTR InstName R3 SYMATTR Value 6.04K SYMBOL res 464 288 R0 SYMATTR InstName R4 SYMATTR Value 2.37K SYMBOL res 464 400 R0 SYMATTR InstName R5 SYMATTR Value 1.6K SYMBOL res -224 64 R0 SYMATTR InstName R6 SYMATTR Value 1K SYMBOL voltage -96 288 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 3.3 SYMBOL res -16 288 R0 SYMATTR InstName R7 SYMATTR Value 10K SYMBOL res 16 304 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R8 SYMATTR Value 10K SYMBOL res -224 240 R0 SYMATTR InstName R9 SYMATTR Value 1K SYMBOL cap 512 -64 R0 SYMATTR InstName C1 SYMATTR Value 10µ SYMBOL zener -400 144 M180 WINDOW 0 31 54 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value BZX84C6V2L SYMBOL diode 704 -16 M180 WINDOW 0 26 67 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value 1N914 SYMBOL nmos -160 368 M0 WINDOW 0 33 -9 Right 2 WINDOW 3 29 99 Right 2 SYMATTR InstName Q2 SYMATTR Value 2N7002 TEXT 744 376 Left 2 !.tran 60u TEXT 304 568 Top 2 ;NOTE: The reset signal must be applied low on startup.