* SPICE netlist
MQ1 N004 P001 N005 N005 SiR158DP
C1 N005 0 10
R1 N004 N001 3m
C2 N001 N011 .1
MQ2 N001 N010 N003 N003 SiR158DP
C3 N003 N009 .1
MQ3 N001 N008 N002 N002 SiR158DP
C4 N016 0 .1
C5 N017 0 .1
R2 N001 N012 13.7K
R3 N012 0 2K
R4 N001 N013 100K
R5 N001 N014 100K
V1 N002 0 PWL(0 0 100u 10 150m 10.5 2.15 13.5)
V2 N003 0 PWL(0 0 100u 12)
C6 N002 N007 .1
XU1 N004 N001 N002 N016 0 N003 N010 N009 N017 0 N015 N011 0 N012 N013 N014 N005 N006 N007 N008 LTC4235-1 ;pnba Sense-)Sense+)In1)IntVcc)Gnd)In2)Dgate2)Cpo2)Ftmr)_EN)Imon)Reg)D2off)On)_Fault)_Pwrgd)Out)Hgate)Cpo1)Dgate1
R6 P001 N006 10
R7 P002 N006 1K
C7 0 P002 10n
Rload N005 0 1.7
.tran 2.5

* LTspice schematic (.asc)
Version 4
SHEET 1 2144 880
WIRE 256 -440 -528 -440
WIRE -368 -392 -1072 -392
WIRE -272 -392 -368 -392
WIRE -192 -392 -272 -392
WIRE 256 -392 256 -440
WIRE 256 -392 -96 -392
WIRE 768 -392 256 -392
WIRE 880 -392 768 -392
WIRE -1072 -376 -1072 -392
WIRE -1072 -280 -1072 -296
WIRE -80 -264 -816 -264
WIRE 16 -264 -80 -264
WIRE 96 -264 16 -264
WIRE 208 -264 192 -264
WIRE 256 -264 256 -392
WIRE 256 -264 208 -264
WIRE 304 -264 256 -264
WIRE 400 -264 384 -264
WIRE 416 -264 400 -264
WIRE 720 -264 512 -264
WIRE 960 -264 720 -264
WIRE 1072 -264 960 -264
WIRE -816 -248 -816 -264
WIRE 960 -248 960 -264
WIRE 1072 -248 1072 -264
WIRE -816 -152 -816 -168
WIRE 960 -152 960 -184
WIRE 1072 -152 1072 -168
WIRE -368 -136 -368 -392
WIRE 208 -136 208 -264
WIRE -80 -120 -80 -264
WIRE 496 -104 496 -136
WIRE 512 -104 496 -104
WIRE 672 -104 656 -104
WIRE 720 -56 720 -264
WIRE 720 -56 592 -56
WIRE -368 -40 -368 -72
WIRE -272 -40 -272 -392
WIRE -176 -40 -176 -344
WIRE -80 -40 -80 -56
WIRE 16 -40 16 -264
WIRE 112 -40 112 -216
WIRE 208 -40 208 -72
WIRE 304 -40 304 -264
WIRE 400 -40 400 -264
WIRE 496 -40 496 -104
WIRE 592 -40 592 -56
WIRE 768 -40 768 -392
WIRE 880 -40 880 -392
WIRE -528 -24 -528 -440
WIRE -528 72 -528 56
WIRE -416 72 -528 72
WIRE -528 88 -528 72
WIRE 768 88 768 40
WIRE 768 88 640 88
WIRE 880 152 880 40
WIRE 880 152 640 152
WIRE -528 184 -528 168
WIRE 672 216 640 216
WIRE -416 232 -448 232
WIRE -224 360 -224 344
WIRE -80 360 -80 344
WIRE 304 360 304 344
WIRE 448 360 448 344
WIRE -224 440 -224 424
WIRE 448 440 448 424
FLAG -80 360 0
FLAG 960 -152 0
FLAG 304 360 0
FLAG -224 440 0
FLAG 448 440 0
FLAG -528 184 0
FLAG -448 232 0
FLAG -816 -152 0
FLAG -1072 -280 0
FLAG 1072 -152 0
FLAG 672 -104 0
SYMBOL nmos 416 -216 R270
SYMATTR InstName Q1
SYMATTR Value SiR158DP
SYMBOL cap 944 -248 R0
SYMATTR InstName C1
SYMATTR Value 10
SYMBOL res 400 -280 R90
SYMATTR InstName R1
SYMATTR Value 3m
SYMBOL cap 192 -136 R0
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL nmos 192 -216 M270
SYMATTR InstName Q2
SYMATTR Value SiR158DP
SYMBOL cap -96 -120 R0
SYMATTR InstName C3
SYMATTR Value .1
SYMBOL nmos -96 -344 M270
SYMATTR InstName Q3
SYMATTR Value SiR158DP
SYMBOL cap -240 360 R0
SYMATTR InstName C4
SYMATTR Value .1
SYMBOL cap 432 360 R0
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL res -544 -40 R0
SYMATTR InstName R2
SYMATTR Value 13.7K
SYMBOL res -544 72 R0
SYMATTR InstName R3
SYMATTR Value 2K
SYMBOL res 752 -56 R0
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL res 864 -56 R0
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL voltage -1072 -392 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 100u 10 150m 10.5 2.15 13.5)
SYMBOL voltage -816 -264 R0
SYMATTR InstName V2
SYMATTR Value PWL(0 0 100u 12)
SYMBOL cap -384 -136 R0
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL LTC4235-1 112 152 R0
SYMATTR InstName U1
SYMBOL res 480 -232 R0
SYMATTR InstName R6
SYMATTR Value 10
SYMBOL res 608 -120 R90
SYMATTR InstName R7
SYMATTR Value 1K
SYMBOL cap 656 -120 R90
SYMATTR InstName C7
SYMATTR Value 10n
SYMBOL res 1056 -264 R0
SYMATTR InstName Rload
SYMATTR Value 1.7