* SPICE netlist
MQ1 N003 N007 N004 N004 FDMS86500DC
R1 N002 N003 30m
V1 N001 0 PWL(0 0 2m 12)
MQ2 N013 N012 N014 N014 FDMS86500DC
R2 N002 N013 30m
S1 N005 N004 N006 0 SWIT
R3 N004 0 20
C1 N005 0 1 Rser=10m
V2 N006 0 PWL(0 0 60m 0 60.01m 1 100m 1 100.01m 0)
C2 N008 0 220n
C3 0 N011 220n
R4 N002 N009 10K
R5 N002 N010 10K
D1 N001 N002 SS3P5
R6 N014 0 100
C4 N014 0 1m Rser=10m
D2 0 N002 SMCJ33A
XU1 N009 N002 N002 N003 N007 N004 N008 0 0 N011 N014 N012 N013 N002 N002 N010 LTC4226-2 ;pnba _FAULT1)ON1)VCC1)SENSE1)GATE1)OUT1)FTMR1)GND)CLS)FTMR2)OUT2)GATE2)SENSE2)VCC2)ON2)_FAULT2
R7 N005 0 1
.tran 1

* LTspice schematic (.asc)
Version 4
SHEET 1 1520 688
WIRE -600 -344 -760 -344
WIRE -472 -344 -536 -344
WIRE -392 -344 -472 -344
WIRE -312 -344 -392 -344
WIRE -152 -344 -312 -344
WIRE -56 -344 -72 -344
WIRE -40 -344 -56 -344
WIRE 136 -344 56 -344
WIRE 344 -344 136 -344
WIRE 456 -344 344 -344
WIRE 648 -344 536 -344
WIRE 760 -344 648 -344
WIRE -760 -328 -760 -344
WIRE 344 -328 344 -344
WIRE 648 -328 648 -344
WIRE 760 -328 760 -344
WIRE -312 -312 -312 -344
WIRE 520 -280 520 -296
WIRE -392 -248 -392 -344
WIRE -760 -232 -760 -248
WIRE 344 -232 344 -248
WIRE 472 -232 472 -296
WIRE 648 -232 648 -248
WIRE 760 -232 760 -264
WIRE -152 -200 -152 -344
WIRE -56 -200 -56 -344
WIRE 40 -200 40 -296
WIRE 136 -200 136 -344
WIRE -472 -152 -472 -344
WIRE -264 -152 -472 -152
WIRE 472 -136 472 -152
WIRE 264 -120 248 -120
WIRE 344 -120 328 -120
WIRE -312 -104 -312 -232
WIRE -264 -104 -312 -104
WIRE -264 -56 -296 -56
WIRE 344 -56 248 -56
WIRE -392 -8 -392 -168
WIRE -264 -8 -392 -8
WIRE 264 8 248 8
WIRE 344 8 328 8
WIRE -472 40 -472 -152
WIRE -264 40 -472 40
WIRE 40 168 40 88
WIRE -472 216 -472 40
WIRE -152 216 -152 88
WIRE -152 216 -472 216
WIRE -56 216 -56 88
WIRE -56 216 -72 216
WIRE -40 216 -56 216
WIRE 136 216 136 88
WIRE 136 216 56 216
WIRE 328 216 136 216
WIRE 440 216 328 216
WIRE 328 232 328 216
WIRE 440 232 440 216
WIRE -472 248 -472 216
WIRE 328 328 328 312
WIRE 440 328 440 296
WIRE -472 344 -472 312
FLAG -760 -232 0
FLAG 344 -232 0
FLAG 760 -232 0
FLAG 472 -136 0
FLAG 344 -56 0
FLAG 520 -280 0
FLAG 328 328 0
FLAG 440 328 0
FLAG -472 344 0
FLAG 648 -232 0
FLAG -296 -56 0
FLAG 344 -120 0
FLAG 344 8 0
SYMBOL nmos -40 -296 R270
SYMATTR InstName Q1
SYMATTR Value FDMS86500DC
SYMBOL res -168 -328 R270
SYMATTR InstName R1
SYMATTR Value 30m
SYMBOL voltage -760 -344 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 2m 12)
SYMBOL nmos -40 168 M90
SYMATTR InstName Q2
SYMATTR Value FDMS86500DC
SYMBOL res -168 232 R270
SYMATTR InstName R2
SYMATTR Value 30m
SYMBOL sw 552 -344 M270
SYMATTR InstName S1
SYMATTR Value SWIT
SYMBOL res 328 -344 R0
SYMATTR InstName R3
SYMATTR Value 20
SYMBOL cap 744 -328 R0
SYMATTR Value2 Rser=10m
SYMATTR Value 1
SYMATTR InstName C1
SYMBOL voltage 472 -248 R0
SYMATTR InstName V2
SYMATTR Value PWL(0 0 60m 0 60.01m 1 100m 1 100.01m 0)
SYMBOL cap 264 -104 R270
SYMATTR InstName C2
SYMATTR Value 220n
SYMBOL cap 328 -8 R90
SYMATTR InstName C3
SYMATTR Value 220n
SYMBOL res -328 -328 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL res -408 -264 R0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL schottky -600 -328 R270
SYMATTR InstName D1
SYMATTR Value SS3P5
SYMBOL res 312 216 R0
SYMATTR InstName R6
SYMATTR Value 100
SYMBOL cap 424 232 R0
SYMATTR Value2 Rser=10m
SYMATTR Value 1m
SYMATTR InstName C4
SYMBOL TVSdiode -488 312 M180
SYMATTR InstName D2
SYMATTR Value SMCJ33A
SYMATTR Type zener
SYMBOL LTC4226-2 -8 -40 R0
SYMATTR InstName U1
SYMBOL res 632 -344 R0
SYMATTR InstName R7
SYMATTR Value 1