* SPICE netlist
MQ1 N021 N019 OUT2 OUT2 Si4864DY
R1 N020 N021 5m
R2 N019 N016 10
MQ2 N002 N003 OUT1 OUT1 Si4864DY
R3 N001 N002 5m
R4 N003 N005 10
R5 OUT2 N018 10K
R6 OUT2 N017 17.8K
R7 N017 0 12.1K
R8 OUT1 N006 10K
R9 OUT1 N004 93.1K
R10 N004 0 12.1K
R11 N008 N001 93.1K
R12 N007 N008 2K
R13 0 N007 10.2K
C1 0 N008 .1
R14 N015 N020 17.8K
R15 N014 N015 2K
R16 0 N014 10.2K
C2 0 N015 .1
C3 0 N013 8
C4 0 N010 .1
C5 0 N009 .01
V1 N001 0 PWL(0 0 10u 0 11u 12)
V2 N020 0 PWL(0 0 10u 0 11u 3.3)
C6 0 OUT2 1000
C7 0 OUT1 1000
V3 N011 0 3
V4 N012 0 3
XU1 N002 N001 N001 N008 N007 N009 N010 N010 0 MP_01 MP_02 MP_03 N013 N014 N015 N020 N020 N021 N016 OUT2 N017 N018 0 MP_04 MP_05 MP_06 MP_07 MP_08 N012 N011 MP_09 0 N006 N004 OUT1 N005 LTC4222 uvautoretry1=1 ovautoretry1=1 ocautoretry1=0 uvautoretry2=1 ovautoretry2=1 ocautoretry2=0 ;pnba Sense-1)Sense+1)Vdd1)UV1)OV1)SS)Config)Vcc)GND))))Timer)OV2)UV2)Vdd2)Sense+2)Sense-2)Gate2)Source2)FB2)GPIO2)_EN2))))))ON2)ON1))_EN1)GPIO1)FB1)Source1)Gate1
.tran 500m

* LTspice schematic (.asc)
Version 4
SHEET 1 1568 1024
WIRE -432 -512 -784 -512
WIRE -224 -512 -432 -512
WIRE -112 -512 -224 -512
WIRE -96 -512 -112 -512
WIRE 0 -512 -16 -512
WIRE 32 -512 0 -512
WIRE 224 -512 128 -512
WIRE 448 -512 224 -512
WIRE 640 -512 448 -512
WIRE -784 -496 -784 -512
WIRE 640 -496 640 -512
WIRE -432 -464 -432 -512
WIRE 336 -464 336 -480
WIRE 448 -448 448 -512
WIRE 112 -432 112 -464
WIRE -784 -400 -784 -416
WIRE 640 -400 640 -432
WIRE 224 -352 224 -512
WIRE 240 -352 224 -352
WIRE 336 -352 336 -384
WIRE 336 -352 320 -352
WIRE -384 -320 -384 -336
WIRE -224 -288 -224 -512
WIRE -112 -288 -112 -512
WIRE 0 -288 0 -512
WIRE 112 -288 112 -352
WIRE 224 -288 224 -352
WIRE 336 -288 336 -352
WIRE 448 -288 448 -368
WIRE -528 -240 -544 -240
WIRE -432 -240 -432 -384
WIRE -432 -240 -448 -240
WIRE -384 -240 -384 -256
WIRE -384 -240 -432 -240
WIRE -320 -240 -384 -240
WIRE -640 -192 -656 -192
WIRE -544 -192 -544 -240
WIRE -544 -192 -560 -192
WIRE -320 -192 -544 -192
WIRE -432 -144 -448 -144
WIRE -320 -144 -368 -144
WIRE 544 -128 512 -128
WIRE -320 -96 -352 -96
WIRE 784 -80 512 -80
WIRE 784 -64 784 -80
WIRE -528 -48 -544 -48
WIRE -352 -48 -352 -96
WIRE -352 -48 -464 -48
WIRE -320 -48 -352 -48
WIRE 672 -32 512 -32
WIRE 672 -16 672 -32
WIRE -320 0 -432 0
WIRE 544 16 512 16
WIRE 784 32 784 16
WIRE -432 48 -432 0
WIRE -432 48 -448 48
WIRE -320 48 -368 48
WIRE 672 80 672 64
WIRE -640 96 -656 96
WIRE -544 96 -560 96
WIRE -320 96 -544 96
WIRE -544 144 -544 96
WIRE -528 144 -544 144
WIRE -432 144 -448 144
WIRE -384 144 -432 144
WIRE -320 144 -384 144
WIRE -384 160 -384 144
WIRE 112 224 112 192
WIRE -384 240 -384 224
WIRE 224 240 224 192
WIRE 240 240 224 240
WIRE 336 240 336 192
WIRE 336 240 320 240
WIRE 448 256 448 192
WIRE -432 272 -432 144
WIRE 336 272 336 240
WIRE 112 352 112 304
WIRE 336 368 336 352
WIRE -432 400 -432 352
WIRE -432 400 -720 400
WIRE -224 400 -224 192
WIRE -224 400 -432 400
WIRE -112 400 -112 192
WIRE -112 400 -224 400
WIRE -96 400 -112 400
WIRE 0 400 0 192
WIRE 0 400 -16 400
WIRE 32 400 0 400
WIRE 224 400 224 240
WIRE 224 400 128 400
WIRE 448 400 448 336
WIRE 448 400 224 400
WIRE 640 400 448 400
WIRE -720 416 -720 400
WIRE 640 416 640 400
WIRE 640 496 640 480
WIRE -720 512 -720 496
FLAG 640 400 OUT2
FLAG 336 368 0
FLAG 336 -480 0
FLAG 640 -512 OUT1
FLAG -656 -192 0
FLAG -384 -336 0
FLAG -656 96 0
FLAG -384 240 0
FLAG -448 48 0
FLAG -544 -48 0
FLAG -448 -144 0
FLAG -784 -400 0
FLAG -720 512 0
FLAG 640 496 0
FLAG 640 -400 0
FLAG 672 80 0
FLAG 784 32 0
FLAG 544 -128 0
FLAG 544 16 0
SYMBOL nmos 32 352 M90
SYMATTR InstName Q1
SYMATTR Value Si4864DY
SYMBOL res -112 384 M90
SYMATTR InstName R1
SYMATTR Value 5m
SYMBOL res 96 320 M180
SYMATTR InstName R2
SYMATTR Value 10
SYMBOL nmos 32 -464 R270
SYMATTR InstName Q2
SYMATTR Value Si4864DY
SYMBOL res -112 -496 R270
SYMATTR InstName R3
SYMATTR Value 5m
SYMBOL res 96 -448 R0
SYMATTR InstName R4
SYMATTR Value 10
SYMBOL res 432 352 M180
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL res 224 224 M90
SYMATTR InstName R6
SYMATTR Value 17.8K
SYMBOL res 320 256 R0
SYMATTR InstName R7
SYMATTR Value 12.1K
SYMBOL res 432 -464 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL res 224 -336 R270
SYMATTR InstName R9
SYMATTR Value 93.1K
SYMBOL res 320 -368 M180
SYMATTR InstName R10
SYMATTR Value 12.1K
SYMBOL res -448 -368 M180
SYMATTR InstName R11
SYMATTR Value 93.1K
SYMBOL res -544 -224 R270
SYMATTR InstName R12
SYMATTR Value 2K
SYMBOL res -656 -176 R270
SYMATTR InstName R13
SYMATTR Value 10.2K
SYMBOL cap -400 -320 R0
SYMATTR Value .1
SYMATTR InstName C1
SYMBOL res -448 256 R0
SYMATTR InstName R14
SYMATTR Value 17.8K
SYMBOL res -544 128 M90
SYMATTR InstName R15
SYMATTR Value 2K
SYMBOL res -656 80 M90
SYMATTR InstName R16
SYMATTR Value 10.2K
SYMBOL cap -400 224 M180
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL cap -432 32 M90
SYMATTR InstName C3
SYMATTR Value 8
SYMBOL cap -528 -64 M90
SYMATTR InstName C4
SYMATTR Value .1
SYMBOL cap -432 -160 M90
SYMATTR InstName C5
SYMATTR Value .01
SYMBOL voltage -784 -512 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 10u 0 11u 12)
SYMBOL voltage -720 400 R0
SYMATTR InstName V2
SYMATTR Value PWL(0 0 10u 0 11u 3.3)
SYMBOL cap 624 480 M180
SYMATTR InstName C6
SYMATTR Value 1000
SYMBOL cap 624 -432 M180
SYMATTR InstName C7
SYMATTR Value 1000
SYMBOL voltage 784 -80 R0
SYMATTR InstName V3
SYMATTR Value 3
SYMBOL voltage 672 -32 R0
SYMATTR InstName V4
SYMATTR Value 3
SYMBOL PowerProducts\\LTC4222 0 -160 R0
SYMATTR InstName U1