* SPICE netlist
C1 0 N003 10n Rser=1K
R1 N002 N003 10
R2 IN N001 20m
MQ1 N001 N002 OUT1 OUT1 IRF7413A
C2 OUT1 0 30
V1 IN 0 PWL(0 0 2.7m 0 +1u 12)
V2 N004 0 PWL(0 0 80m 0 +1u 3.3 300m 3.3 +1u 0)
V3 N005 0 PWL(0 0 130m 0 +1u 3.3)
C3 0 N006 10n Rser=1K
R3 N007 N006 10
R4 IN N008 20m
MQ2 N008 N007 OUT2 OUT2 IRF7413A
C4 OUT2 0 30
XU1 IN N004 N005 0 N006 N003 N008 N001 LTC1647-1 ;pnba Vcc)ON1)ON2)GND)Gate2)Gate1)Sense2)Sense1
D1 0 N003 EDZV22B
D2 0 N006 EDZV22B
Rload1 OUT1 0 8
Rload2 OUT2 0 6
.tran 0.4

* LTspice schematic (.asc)
Version 4
SHEET 1 1584 560
WIRE -472 -280 -792 -280
WIRE 120 -280 -472 -280
WIRE 152 -280 120 -280
WIRE 264 -280 232 -280
WIRE 280 -280 264 -280
WIRE 680 -280 376 -280
WIRE 792 -280 680 -280
WIRE -792 -264 -792 -280
WIRE 680 -264 680 -280
WIRE 792 -264 792 -280
WIRE 360 -184 360 -232
WIRE -792 -168 -792 -184
WIRE 504 -168 472 -168
WIRE 600 -168 568 -168
WIRE 680 -168 680 -200
WIRE 792 -168 792 -184
WIRE 120 -136 120 -280
WIRE 264 -136 264 -280
WIRE -232 -72 -280 -72
WIRE 72 -72 -152 -72
WIRE 360 -72 360 -104
WIRE 360 -72 328 -72
WIRE 472 -72 472 -168
WIRE 472 -72 360 -72
WIRE 504 -72 472 -72
WIRE 600 -72 568 -72
WIRE -232 72 -280 72
WIRE 72 72 -152 72
WIRE 360 72 328 72
WIRE 472 72 360 72
WIRE 504 72 472 72
WIRE 600 72 568 72
WIRE 360 104 360 72
WIRE 120 152 120 136
WIRE 472 184 472 72
WIRE 504 184 472 184
WIRE 600 184 568 184
WIRE 792 184 792 168
WIRE 680 200 680 168
WIRE 360 232 360 184
WIRE -472 280 -472 -280
WIRE 152 280 -472 280
WIRE 264 280 264 136
WIRE 264 280 232 280
WIRE 280 280 264 280
WIRE 680 280 680 264
WIRE 680 280 376 280
WIRE 792 280 792 264
WIRE 792 280 680 280
FLAG 600 -72 0
FLAG 120 152 0
FLAG 680 -168 0
FLAG -792 -168 0
FLAG 792 -280 OUT1
FLAG -792 -280 IN
FLAG -280 -72 0
FLAG 792 -168 0
FLAG 600 -168 0
FLAG -280 72 0
FLAG 600 72 0
FLAG 600 184 0
FLAG 680 168 0
FLAG 792 280 OUT2
FLAG 792 168 0
SYMBOL cap 568 -88 R90
SYMATTR InstName C1
SYMATTR Value 10n
SYMATTR SpiceLine Rser=1K
SYMBOL res 344 -200 R0
SYMATTR InstName R1
SYMATTR Value 10
SYMBOL res 136 -264 R270
SYMATTR InstName R2
SYMATTR Value 20m
SYMBOL nmos 280 -232 R270
SYMATTR InstName Q1
SYMATTR Value IRF7413A
SYMBOL cap 664 -264 R0
SYMATTR InstName C2
SYMATTR Value 30
SYMBOL voltage -792 -280 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 2.7m 0 +1u 12)
SYMBOL voltage -136 -72 R90
SYMATTR Value PWL(0 0 80m 0 +1u 3.3 300m 3.3 +1u 0)
SYMATTR InstName V2
SYMBOL voltage -136 72 R90
SYMATTR Value PWL(0 0 130m 0 +1u 3.3)
SYMATTR InstName V3
SYMBOL cap 568 88 M270
SYMATTR InstName C3
SYMATTR Value 10n
SYMATTR SpiceLine Rser=1K
SYMBOL res 344 200 M180
SYMATTR InstName R3
SYMATTR Value 10
SYMBOL res 136 264 M90
SYMATTR InstName R4
SYMATTR Value 20m
SYMBOL nmos 280 232 M90
SYMATTR InstName Q2
SYMATTR Value IRF7413A
SYMBOL cap 664 264 M180
SYMATTR InstName C4
SYMATTR Value 30
SYMBOL LTC1647-1 200 -8 R0
SYMATTR InstName U1
SYMBOL zener 568 -184 R90
SYMATTR InstName D1
SYMATTR Value EDZV22B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL zener 568 168 R90
SYMATTR InstName D2
SYMATTR Value EDZV22B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 776 -280 R0
SYMATTR InstName Rload1
SYMATTR Value 8
SYMBOL res 776 280 M180
SYMATTR InstName Rload2
SYMATTR Value 6