* SPICE netlist
MQ3 N002 N004 OUT OUT Si7386DP
MQ1 N001 N008 IN1 IN1 Si7386DP
C1 IN1 N007 .1
R6 N001 N012 100K
R7 N001 N014 100K
R3 N005 N006 47
R2 N005 N004 10
C3 N006 0 .015
C6 0 N015 .1
C2 IN2 N009 .1
R5 N011 N001 137K
R4 0 N011 20K
C4 N011 0 .01
C5 N013 0 .1
C7 OUT 0 100
V1 IN1 0 PWL(0 0 10u 0 +1u 11)
V2 IN2 0 PWL(0 0 10u 0 +1u 12)
R1 N002 N001 .006
MQ2 N001 N010 IN2 IN2 Si7386DP
S1 0 OUT N003 0 SCSW
V3 N003 0 PWL(0 0 300m 0 +1m 1 +10m 1 +1m 0)
XU1 N002 N001 IN1 N013 0 IN2 N010 N009 MP_01 N014 N012 0 N015 0 N011 MP_02 OUT N005 N007 N008 LTC4227-2 ;pnba Sense-)Sense+)In1)IntVcc)Gnd)In2)DGate2)Cpo2))_Pwrgd)_Fault)_D2on)Tmr)_En)On))Out)HGate)Cpo1)DGate1
.tran 1600m

* LTspice schematic (.asc)
Version 4
SHEET 1 1840 784
WIRE -552 -376 -904 -376
WIRE -472 -376 -552 -376
WIRE -408 -376 -472 -376
WIRE -24 -376 -312 -376
WIRE -8 -376 -24 -376
WIRE 88 -376 72 -376
WIRE 120 -376 88 -376
WIRE 504 -376 216 -376
WIRE 632 -376 504 -376
WIRE 760 -376 632 -376
WIRE -904 -360 -904 -376
WIRE 632 -360 632 -376
WIRE 760 -360 760 -376
WIRE 920 -344 808 -344
WIRE -552 -328 -552 -376
WIRE 920 -328 920 -344
WIRE 200 -280 200 -328
WIRE -904 -264 -904 -280
WIRE 632 -264 632 -296
WIRE 760 -264 760 -280
WIRE 920 -232 920 -248
WIRE -312 -168 -904 -168
WIRE -232 -168 -312 -168
WIRE -168 -168 -232 -168
WIRE -24 -168 -24 -376
WIRE -24 -168 -72 -168
WIRE -904 -152 -904 -168
WIRE 200 -152 200 -200
WIRE 216 -152 200 -152
WIRE 312 -152 296 -152
WIRE 392 -152 376 -152
WIRE -312 -120 -312 -168
WIRE 504 -88 504 -376
WIRE 504 -88 280 -88
WIRE -904 -56 -904 -72
WIRE -24 -8 -24 -168
WIRE -24 -8 -904 -8
WIRE 520 -8 -24 -8
WIRE -904 24 -904 -8
WIRE -552 24 -552 -264
WIRE -472 24 -472 -376
WIRE -392 24 -392 -328
WIRE -312 24 -312 -56
WIRE -232 24 -232 -168
WIRE -152 24 -152 -120
WIRE -24 24 -24 -8
WIRE 88 24 88 -376
WIRE 200 24 200 -152
WIRE 280 24 280 -88
WIRE -904 152 -904 104
WIRE -776 152 -904 152
WIRE -616 152 -776 152
WIRE 360 152 344 152
WIRE 520 152 520 -8
WIRE 520 152 440 152
WIRE -904 168 -904 152
WIRE -776 200 -776 152
WIRE -616 232 -680 232
WIRE 408 232 344 232
WIRE 520 232 520 152
WIRE 520 232 488 232
WIRE -904 264 -904 248
WIRE -776 296 -776 264
WIRE -680 312 -680 296
WIRE -616 312 -680 312
WIRE 376 312 344 312
WIRE 456 312 440 312
WIRE -680 344 -680 312
WIRE -616 392 -632 392
WIRE 360 392 344 392
FLAG 392 -152 0
FLAG 456 312 0
FLAG -680 344 0
FLAG -904 -264 0
FLAG -904 -56 0
FLAG -904 -376 IN1
FLAG -904 -168 IN2
FLAG 760 -376 OUT
FLAG 632 -264 0
FLAG 760 -264 0
FLAG 808 -296 0
FLAG 920 -232 0
FLAG 360 392 0
FLAG -632 392 0
FLAG -904 264 0
FLAG -776 296 0
SYMBOL nmos 120 -328 R270
SYMATTR InstName Q3
SYMATTR Value Si7386DP
SYMBOL nmos -312 -328 M270
SYMATTR InstName Q1
SYMATTR Value Si7386DP
SYMBOL cap -568 -328 R0
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL res 456 136 R90
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res 504 216 R90
SYMATTR InstName R7
SYMATTR Value 100K
SYMBOL res 200 -168 M90
SYMATTR InstName R3
SYMATTR Value 47
SYMBOL res 184 -184 M180
SYMATTR InstName R2
SYMATTR Value 10
SYMBOL cap 312 -168 M90
SYMATTR InstName C3
SYMATTR Value .015
SYMBOL cap 440 296 R90
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL cap -328 -120 R0
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL res -920 120 M180
SYMATTR InstName R5
SYMATTR Value 137K
SYMBOL res -920 264 M180
SYMATTR InstName R4
SYMATTR Value 20K
SYMBOL cap -792 200 R0
SYMATTR InstName C4
SYMATTR Value .01
SYMBOL cap -696 232 R0
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL cap 616 -360 R0
SYMATTR InstName C7
SYMATTR Value 100
SYMBOL voltage -904 -376 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 10u 0 +1u 11)
SYMBOL voltage -904 -168 R0
SYMATTR InstName V2
SYMATTR Value PWL(0 0 10u 0 +1u 12)
SYMBOL res 88 -392 R90
SYMATTR InstName R1
SYMATTR Value .006
SYMBOL nmos -72 -120 M270
SYMATTR InstName Q2
SYMATTR Value Si7386DP
SYMBOL sw 760 -264 R180
SYMATTR InstName S1
SYMATTR Value SCSW
SYMBOL voltage 920 -344 R0
SYMATTR InstName V3
SYMATTR Value PWL(0 0 300m 0 +1m 1 +10m 1 +1m 0)
SYMBOL LTC4227-2 -520 248 R0
SYMATTR InstName U1