Version 4
SHEET 1 1272 848
WIRE -160 -32 -256 -32
WIRE 32 -32 -160 -32
WIRE 160 -32 32 -32
WIRE 192 -32 160 -32
WIRE -256 16 -256 -32
WIRE 32 16 32 -32
WIRE -160 32 -160 -32
WIRE -64 48 -112 48
WIRE -48 48 -64 48
WIRE 160 64 160 32
WIRE 160 64 96 64
WIRE -64 112 -64 48
WIRE 32 112 16 112
WIRE 96 112 96 64
WIRE 192 112 192 48
WIRE 192 112 176 112
WIRE -256 128 -256 80
WIRE -160 144 -160 128
WIRE -128 144 -160 144
WIRE -112 144 -128 144
WIRE 192 144 192 112
WIRE 192 192 192 144
WIRE 32 208 32 112
WIRE -128 224 -128 144
WIRE -80 224 -128 224
WIRE -256 240 -256 192
WIRE 96 256 96 112
WIRE 240 288 240 272
WIRE 32 304 0 304
WIRE -256 320 -256 304
WIRE -240 320 -256 320
WIRE -80 320 -80 304
WIRE -80 320 -176 320
WIRE -80 336 -80 320
WIRE 0 336 0 304
WIRE 0 336 -80 336
WIRE -256 352 -256 320
WIRE -256 352 -368 352
WIRE -80 352 -80 336
WIRE -128 368 -128 224
WIRE 240 384 240 368
WIRE -368 448 -368 432
WIRE -256 448 -256 416
WIRE -256 448 -368 448
WIRE -256 464 -256 448
WIRE -128 464 -128 432
WIRE -128 464 -256 464
WIRE -80 464 -80 416
WIRE -80 464 -128 464
WIRE 192 464 192 288
WIRE 192 464 -80 464
WIRE 240 464 192 464
WIRE -256 496 -256 464
FLAG -256 496 0
FLAG -112 144 SW
FLAG -48 48 G
FLAG 192 144 D
SYMBOL pmos -112 128 R180
WINDOW 0 -29 54 Left 2
WINDOW 3 68 0 VRight 2
SYMATTR InstName M1
SYMATTR Value FDS6675
SYMBOL Misc\\cell -256 16 R0
WINDOW 0 -41 -10 Left 2
WINDOW 3 -39 56 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3.1
SYMBOL Misc\\cell -256 128 R0
WINDOW 0 -46 10 Left 2
WINDOW 3 -51 54 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 3.7
SYMBOL Misc\\cell -256 240 R0
WINDOW 0 -41 -12 Left 2
WINDOW 3 -36 53 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 3.3
SYMBOL Misc\\cell -256 352 R0
WINDOW 0 -38 -11 Left 2
WINDOW 3 -34 61 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 3.2
SYMBOL cap -96 352 R0
SYMATTR InstName C1
SYMATTR Value 220n
SYMBOL voltage 240 368 R0
WINDOW 3 30 -478 VRight 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 3 10u 50n 50n 13u 250u)
SYMATTR InstName V6
SYMBOL schottky -176 304 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind -96 208 R0
SYMATTR InstName L1
SYMATTR Value 470µ
SYMATTR SpiceLine Rser=1.05
SYMBOL schottky -112 432 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -384 336 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 176 -48 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 224 272 R0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL nmosd 240 192 M0
WINDOW 0 8 -9 Left 2
WINDOW 3 90 88 VLeft 2
SYMATTR InstName M2
SYMATTR Value BSS123
SYMBOL res 32 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10
SYMBOL npn 96 16 M0
WINDOW 0 57 24 Left 2
WINDOW 3 29 55 Left 2
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL pnp 96 304 R180
WINDOW 0 56 23 Left 2
WINDOW 3 49 61 Left 2
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL res 80 128 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL zener 176 32 R180
WINDOW 0 36 14 Left 2
WINDOW 3 25 48 Left 2
SYMATTR InstName D4
SYMATTR Value BZX84C15L
SYMATTR Description Diode
SYMATTR Type diode
TEXT -232 488 Left 2 !.tran 10m startup
TEXT -432 72 Left 2 ;I(D1)=47.9mA\nI(V1)=15.2mA\nI(V4)=29.5mA