* 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
R6 P001 N006 10
R7 P002 N006 1K
C7 0 P002 10n
XU1 N004 N001 N002 N016 0 N003 N010 N009 N017 0 N015 N011 0 N012 N013 N014 N005 N006 N007 N008 LTC4235-2 ;pnba Sense-)Sense+)In1)IntVcc)Gnd)In2)Dgate2)Cpo2)Ftmr)_EN)Imon)Reg)D2off)On)_Fault)_Pwrgd)Out)Hgate)Cpo1)Dgate1
Rload N005 0 1.7
.tran 2.5

* LTspice schematic (.asc)
Version 4
SHEET 1 2400 848
WIRE 384 -424 -400 -424
WIRE -240 -376 -1200 -376
WIRE -144 -376 -240 -376
WIRE -64 -376 -144 -376
WIRE 384 -376 384 -424
WIRE 384 -376 32 -376
WIRE 896 -376 384 -376
WIRE 1008 -376 896 -376
WIRE -1200 -360 -1200 -376
WIRE 48 -280 -688 -280
WIRE 144 -280 48 -280
WIRE 224 -280 144 -280
WIRE 336 -280 320 -280
WIRE 384 -280 384 -376
WIRE 384 -280 336 -280
WIRE 432 -280 384 -280
WIRE 528 -280 512 -280
WIRE 544 -280 528 -280
WIRE 848 -280 640 -280
WIRE 1088 -280 848 -280
WIRE 1200 -280 1088 -280
WIRE -1200 -264 -1200 -280
WIRE -688 -264 -688 -280
WIRE 1088 -264 1088 -280
WIRE 1200 -264 1200 -280
WIRE -688 -168 -688 -184
WIRE 1088 -168 1088 -200
WIRE 1200 -168 1200 -184
WIRE -240 -152 -240 -376
WIRE 336 -152 336 -280
WIRE 48 -136 48 -280
WIRE 624 -120 624 -152
WIRE 640 -120 624 -120
WIRE 800 -120 784 -120
WIRE -400 -72 -400 -424
WIRE 848 -72 848 -280
WIRE 848 -72 720 -72
WIRE -240 -56 -240 -88
WIRE -144 -56 -144 -376
WIRE -48 -56 -48 -328
WIRE 48 -56 48 -72
WIRE 144 -56 144 -280
WIRE 240 -56 240 -232
WIRE 336 -56 336 -88
WIRE 432 -56 432 -280
WIRE 528 -56 528 -280
WIRE 624 -56 624 -120
WIRE 720 -56 720 -72
WIRE 896 -56 896 -376
WIRE 1008 -56 1008 -376
WIRE -400 56 -400 8
WIRE -288 56 -400 56
WIRE -400 72 -400 56
WIRE 896 72 896 24
WIRE 896 72 768 72
WIRE 1008 136 1008 24
WIRE 1008 136 768 136
WIRE -400 200 -400 152
WIRE 800 200 768 200
WIRE -288 216 -320 216
WIRE -96 344 -96 328
WIRE 48 344 48 328
WIRE 432 344 432 328
WIRE 576 344 576 328
WIRE -96 424 -96 408
WIRE 576 424 576 408
FLAG 48 344 0
FLAG 1088 -168 0
FLAG 432 344 0
FLAG -96 424 0
FLAG 576 424 0
FLAG -400 200 0
FLAG -320 216 0
FLAG -688 -168 0
FLAG -1200 -264 0
FLAG 1200 -168 0
FLAG 800 -120 0
SYMBOL nmos 544 -232 R270
SYMATTR InstName Q1
SYMATTR Value SiR158DP
SYMBOL cap 1072 -264 R0
SYMATTR InstName C1
SYMATTR Value 10
SYMBOL res 528 -296 R90
SYMATTR InstName R1
SYMATTR Value 3m
SYMBOL cap 320 -152 R0
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL nmos 320 -232 M270
SYMATTR InstName Q2
SYMATTR Value SiR158DP
SYMBOL cap 32 -136 R0
SYMATTR InstName C3
SYMATTR Value .1
SYMBOL nmos 32 -328 M270
SYMATTR InstName Q3
SYMATTR Value SiR158DP
SYMBOL cap -112 344 R0
SYMATTR InstName C4
SYMATTR Value .1
SYMBOL cap 560 344 R0
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL res -416 -88 R0
SYMATTR InstName R2
SYMATTR Value 13.7K
SYMBOL res -416 56 R0
SYMATTR InstName R3
SYMATTR Value 2K
SYMBOL res 880 -72 R0
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL res 992 -72 R0
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL voltage -1200 -376 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 100u 10 150m 10.5 2.15 13.5)
SYMBOL voltage -688 -280 R0
SYMATTR InstName V2
SYMATTR Value PWL(0 0 100u 12)
SYMBOL cap -256 -152 R0
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL res 608 -248 R0
SYMATTR InstName R6
SYMATTR Value 10
SYMBOL res 736 -136 R90
SYMATTR InstName R7
SYMATTR Value 1K
SYMBOL cap 784 -136 R90
SYMATTR InstName C7
SYMATTR Value 10n
SYMBOL LTC4235-2 240 136 R0
SYMATTR InstName U1
SYMBOL res 1184 -280 R0
SYMATTR InstName Rload
SYMATTR Value 1.7