* SPICE netlist
MQ2 N002 N003 OUT OUT SiR158DP
MQ1 N001 N007 IN1 IN1 SiR158DP
C1 IN1 N006 .1
R7 N001 N008 100K
R9 N001 N011 100K
R5 N005 N004 47
R3 N005 N003 10
C3 N004 0 .015
R14 N009 N001 137K
R13 0 N009 20K
R15 N018 0 20K
C7 N009 0 .01
C8 0 N018 .01
C9 N012 0 .1
R16 N021 N018 137K
R1 N002 N001 .004
R8 N001 N010 100K
MQ4 N026 N025 OUT OUT SiR158DP
MQ3 N021 N024 IN2 IN2 SiR158DP
C2 IN2 N022 .1
R6 N020 N023 47
R4 N020 N025 10
C4 N023 0 .015
R2 N026 N021 .004
R10 N019 N021 100K
R12 N016 N021 100K
R11 N017 N021 100K
C10 OUT 0 100
V1 IN1 0 PWL(0 0 20u 0 +1u 12)
V2 IN2 0 PWL(0 0 20u 0 +1u 11)
C5 0 N013 .047
C6 0 N014 .047
XU1 N002 N001 IN1 N012 0 IN2 N021 N026 N024 N022 N019 N020 OUT N016 N017 N018 0 N014 N013 0 N009 N010 N011 OUT N005 N008 N006 N007 LTC4228-2 ;pnba Sense1-)Sense1+)In1)IntVcc)Gnd)In2)Sense2+)Sense2-)DGate2)Cpo2)_Status2)HGate2)Out2)_Pwrgd2)_Fault2)On2)_En2)Tmr2)Tmr1)_En1)On1)_Fault1)_Pwrgd1)Out1)HGate1)_Status1)Cpo1)DGate1
S1 OUT 0 N015 0 SCSW
V3 N015 0 PWL(0 0 300m 0 +100u 1 + 10m 1 +100u 0)
.tran 1

* LTspice schematic (.asc)
Version 4
SHEET 1 2192 1248
WIRE -24 -624 -792 -624
WIRE 600 -624 -24 -624
WIRE -408 -560 -1096 -560
WIRE -312 -560 -408 -560
WIRE -184 -560 -312 -560
WIRE -24 -560 -24 -624
WIRE -24 -560 -88 -560
WIRE -8 -560 -24 -560
WIRE 88 -560 72 -560
WIRE 152 -560 88 -560
WIRE 424 -560 248 -560
WIRE 792 -560 424 -560
WIRE -1096 -544 -1096 -560
WIRE 312 -496 312 -512
WIRE -408 -480 -408 -560
WIRE -1096 -448 -1096 -464
WIRE 232 -416 232 -512
WIRE 312 -416 312 -432
WIRE 600 -368 600 -624
WIRE 600 -368 504 -368
WIRE 696 -368 600 -368
WIRE -792 -352 -792 -624
WIRE 504 -352 504 -368
WIRE 232 -320 232 -336
WIRE 312 -320 312 -336
WIRE 312 -320 232 -320
WIRE 424 -304 424 -560
WIRE 424 -304 376 -304
WIRE -408 -288 -408 -416
WIRE -312 -288 -312 -560
WIRE -168 -288 -168 -512
WIRE -24 -288 -24 -560
WIRE 88 -288 88 -560
WIRE 232 -288 232 -320
WIRE 376 -288 376 -304
WIRE 600 -272 600 -368
WIRE 504 -208 504 -272
WIRE 504 -208 456 -208
WIRE 696 -208 696 -368
WIRE -792 -192 -792 -272
WIRE -664 -192 -792 -192
WIRE -504 -192 -664 -192
WIRE 600 -160 600 -192
WIRE 600 -160 456 -160
WIRE -792 -144 -792 -192
WIRE -664 -144 -664 -192
WIRE -504 -128 -520 -128
WIRE 696 -112 696 -128
WIRE 696 -112 456 -112
WIRE -504 -64 -568 -64
WIRE 488 -64 456 -64
WIRE 568 -64 552 -64
WIRE 792 -32 792 -560
WIRE 984 -32 792 -32
WIRE 1096 -32 984 -32
WIRE -792 -16 -792 -64
WIRE -792 -16 -840 -16
WIRE -664 -16 -664 -80
WIRE -664 -16 -792 -16
WIRE 984 -16 984 -32
WIRE 936 0 920 0
WIRE 1096 0 1096 -32
WIRE -792 16 -792 -16
WIRE -664 16 -664 -16
WIRE -568 16 -568 0
WIRE -504 16 -568 16
WIRE 488 16 456 16
WIRE 568 16 552 16
WIRE -568 48 -568 16
WIRE 936 48 856 48
WIRE 696 64 456 64
WIRE 856 64 856 48
WIRE -504 80 -520 80
WIRE 696 80 696 64
WIRE 984 96 984 64
WIRE 1096 96 1096 64
WIRE 600 112 456 112
WIRE -792 144 -792 96
WIRE -664 144 -664 80
WIRE -664 144 -792 144
WIRE -504 144 -664 144
WIRE 504 160 456 160
WIRE 600 160 600 112
WIRE 856 160 856 144
WIRE 504 224 504 160
WIRE 376 256 376 240
WIRE 424 256 376 256
WIRE -792 272 -792 144
WIRE 232 272 232 240
WIRE 312 272 232 272
WIRE 232 288 232 272
WIRE 312 288 312 272
WIRE 504 320 504 304
WIRE 600 320 600 240
WIRE 600 320 504 320
WIRE 696 320 696 160
WIRE 696 320 600 320
WIRE -408 368 -408 240
WIRE 312 384 312 368
WIRE -168 464 -168 240
WIRE 232 464 232 368
WIRE 312 464 312 448
WIRE -408 512 -408 432
WIRE -408 512 -1096 512
WIRE -312 512 -312 240
WIRE -312 512 -408 512
WIRE -184 512 -312 512
WIRE -24 512 -24 240
WIRE -24 512 -88 512
WIRE -8 512 -24 512
WIRE 88 512 88 240
WIRE 88 512 72 512
WIRE 152 512 88 512
WIRE 424 512 424 256
WIRE 424 512 248 512
WIRE 792 512 792 -32
WIRE 792 512 424 512
WIRE -1096 528 -1096 512
WIRE -792 592 -792 352
WIRE -24 592 -24 512
WIRE -24 592 -792 592
WIRE 600 592 600 320
WIRE 600 592 -24 592
WIRE -1096 624 -1096 608
FLAG 312 -512 0
FLAG 568 -64 0
FLAG 568 16 0
FLAG -840 -16 0
FLAG -568 48 0
FLAG -520 -128 0
FLAG -520 80 0
FLAG -1096 -448 0
FLAG -1096 624 0
FLAG -1096 -560 IN1
FLAG -1096 512 IN2
FLAG 312 464 0
FLAG 1096 96 0
FLAG 984 96 0
FLAG 920 0 0
FLAG 1096 -32 OUT
FLAG 856 160 0
SYMBOL nmos 152 -512 R270
SYMATTR InstName Q2
SYMATTR Value SiR158DP
SYMBOL nmos -88 -512 M270
SYMATTR InstName Q1
SYMATTR Value SiR158DP
SYMBOL cap -424 -480 R0
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL res 488 -368 R0
SYMATTR InstName R7
SYMATTR Value 100K
SYMBOL res 680 -224 R0
SYMATTR InstName R9
SYMATTR Value 100K
SYMBOL res 296 -320 M180
SYMATTR InstName R5
SYMATTR Value 47
SYMBOL res 216 -320 M180
SYMATTR InstName R3
SYMATTR Value 10
SYMBOL cap 296 -432 M180
SYMATTR InstName C3
SYMATTR Value .015
SYMBOL res -808 -256 M180
SYMATTR InstName R14
SYMATTR Value 137K
SYMBOL res -808 -48 M180
SYMATTR InstName R13
SYMATTR Value 20K
SYMBOL res -808 112 M180
SYMATTR InstName R15
SYMATTR Value 20K
SYMBOL cap -680 -144 R0
SYMATTR InstName C7
SYMATTR Value .01
SYMBOL cap -680 16 R0
SYMATTR InstName C8
SYMATTR Value .01
SYMBOL cap -584 -64 R0
SYMATTR InstName C9
SYMATTR Value .1
SYMBOL res -808 368 M180
SYMATTR InstName R16
SYMATTR Value 137K
SYMBOL res 88 -576 R90
SYMATTR InstName R1
SYMATTR Value .004
SYMBOL res 584 -288 R0
SYMATTR InstName R8
SYMATTR Value 100K
SYMBOL nmos 152 464 M90
SYMATTR InstName Q4
SYMATTR Value SiR158DP
SYMBOL nmos -88 464 R90
SYMATTR InstName Q3
SYMATTR Value SiR158DP
SYMBOL cap -424 432 M180
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL res 296 272 R0
SYMATTR InstName R6
SYMATTR Value 47
SYMBOL res 216 272 R0
SYMATTR InstName R4
SYMATTR Value 10
SYMBOL cap 296 384 R0
SYMATTR InstName C4
SYMATTR Value .015
SYMBOL res 88 528 M270
SYMATTR InstName R2
SYMATTR Value .004
SYMBOL res 488 208 R0
SYMATTR InstName R10
SYMATTR Value 100K
SYMBOL res 680 64 R0
SYMATTR InstName R12
SYMATTR Value 100K
SYMBOL res 584 144 R0
SYMATTR InstName R11
SYMATTR Value 100K
SYMBOL cap 1080 0 R0
SYMATTR InstName C10
SYMATTR Value 100
SYMBOL voltage -1096 -560 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 20u 0 +1u 12)
SYMBOL voltage -1096 512 R0
SYMATTR InstName V2
SYMATTR Value PWL(0 0 20u 0 +1u 11)
SYMBOL cap 552 -80 R90
SYMATTR InstName C5
SYMATTR Value .047
SYMBOL cap 552 0 R90
SYMATTR InstName C6
SYMATTR Value .047
SYMBOL LTC4228-2 -408 -48 R0
SYMATTR InstName U1
SYMBOL sw 984 -32 R0
SYMATTR InstName S1
SYMATTR Value SCSW
SYMBOL voltage 856 48 R0
SYMATTR Value PWL(0 0 300m 0  +100u 1 + 10m 1 +100u 0)
SYMATTR InstName V3