* SPICE netlist
XU1 IN N002 N001 IN N001 N015 0 N015 N015 N016 0 N010 N013 0 0 N014 N012 N011 N009 N007 OUT N005 N004 N008 LTC4229 ;pnba Dsrc)Sense-)Sense+)In)Dsns)IntVcc)Gnd)Dtmr)Rtmr)Ftmr)_En)UV)OV)Dcfg)Doff)_Dflt)_Dstat)_Fault)_Pwrgd)FB)Out)HGate)Cpo)DGate
R1 N001 N010 21.5K
R2 N010 N013 1.1K
R3 N013 0 2K
C1 N015 0 .1
MQ1 N001 N008 IN IN SiR818DP
MQ2 N002 N003 OUT OUT SiR818DP
R4 N002 N001 2.5m
V1 IN 0 PWL(0 0 .1m 12 200m 12 +100u 12 +100n 0 +100u 0 +100n 12)
C2 IN N004 .1
R5 N003 N005 10
R6 N006 N005 1K
C3 N006 0 10n
R7 OUT N007 15K
R8 N007 0 2K
C4 OUT 0 680 Rser=50m
R9 N001 N009 100K
R10 N001 N011 100K
R11 N001 N012 100K
R12 N001 N014 100K
C5 N016 0 .1
Rload OUT 0 10
.tran 0 200.5m 200m

* LTspice schematic (.asc)
Version 4
SHEET 1 2224 880
WIRE 872 -440 120 -440
WIRE 120 -360 120 -440
WIRE 120 -360 -504 -360
WIRE 200 -360 120 -360
WIRE 344 -360 280 -360
WIRE 376 -360 344 -360
WIRE 680 -360 472 -360
WIRE 776 -360 680 -360
WIRE 936 -360 776 -360
WIRE 1112 -360 936 -360
WIRE 936 -344 936 -360
WIRE 1112 -344 1112 -360
WIRE 456 -296 456 -312
WIRE -104 -280 -1112 -280
WIRE -8 -280 -104 -280
WIRE 120 -280 120 -360
WIRE 120 -280 88 -280
WIRE -1112 -264 -1112 -280
WIRE 936 -248 936 -280
WIRE 1112 -248 1112 -264
WIRE 776 -232 776 -360
WIRE -312 -216 -328 -216
WIRE -216 -216 -248 -216
WIRE -104 -216 -104 -280
WIRE -104 -216 -216 -216
WIRE 456 -184 456 -216
WIRE 472 -184 456 -184
WIRE 568 -184 552 -184
WIRE 648 -184 632 -184
WIRE -1112 -168 -1112 -184
WIRE 120 -168 120 -280
WIRE 232 -168 120 -168
WIRE 680 -136 680 -360
WIRE 680 -136 568 -136
WIRE 776 -136 776 -152
WIRE 776 -136 712 -136
WIRE -328 -120 -328 -216
WIRE -216 -120 -216 -216
WIRE -104 -120 -104 -216
WIRE 8 -120 8 -232
WIRE 120 -120 120 -168
WIRE 232 -120 232 -168
WIRE 344 -120 344 -360
WIRE 456 -120 456 -184
WIRE 568 -120 568 -136
WIRE 776 -120 776 -136
WIRE -504 -72 -504 -360
WIRE 712 -56 712 -136
WIRE 712 -56 616 -56
WIRE 776 -24 776 -40
WIRE 648 8 616 8
WIRE 872 8 872 -440
WIRE 872 8 728 8
WIRE -504 24 -504 8
WIRE -376 24 -504 24
WIRE -504 56 -504 24
WIRE 728 72 616 72
WIRE 872 72 872 8
WIRE 872 72 808 72
WIRE 648 136 616 136
WIRE 872 136 872 72
WIRE 872 136 728 136
WIRE -504 184 -504 136
WIRE -376 184 -504 184
WIRE -504 200 -504 184
WIRE 728 200 616 200
WIRE 872 200 872 136
WIRE 872 200 808 200
WIRE 632 264 616 264
WIRE -504 296 -504 280
WIRE -216 344 -216 328
WIRE -104 344 -104 328
WIRE 8 344 8 328
WIRE 120 344 120 328
WIRE 232 344 232 328
WIRE 232 344 120 344
WIRE 344 344 344 328
WIRE 344 344 232 344
WIRE 456 344 456 328
WIRE 120 360 120 344
WIRE 456 424 456 408
WIRE 120 440 120 424
FLAG -104 344 0
FLAG -504 296 0
FLAG 120 440 0
FLAG -1112 -168 0
FLAG 648 -184 0
FLAG 776 -24 0
FLAG 936 -248 0
FLAG 1112 -360 OUT
FLAG 456 424 0
FLAG -1112 -280 IN
FLAG 1112 -248 0
FLAG -216 344 0
FLAG 8 344 0
FLAG 632 264 0
SYMBOL LTC4229 120 104 R0
SYMATTR InstName U1
SYMBOL res -520 -88 R0
SYMATTR InstName R1
SYMATTR Value 21.5K
SYMBOL res -520 40 R0
SYMATTR InstName R2
SYMATTR Value 1.1K
SYMBOL res -520 184 R0
SYMATTR InstName R3
SYMATTR Value 2K
SYMBOL cap 104 360 R0
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL nmos 88 -232 M270
SYMATTR InstName Q1
SYMATTR Value SiR818DP
SYMBOL nmos 376 -312 R270
SYMATTR InstName Q2
SYMATTR Value SiR818DP
SYMBOL res 296 -376 R90
SYMATTR InstName R4
SYMATTR Value 2.5m
SYMBOL voltage -1112 -280 R0
SYMATTR Value PWL(0 0 .1m 12 200m 12
SYMATTR Value2 +100u 12 +100n 0 +100u 0 +100n 12)
SYMATTR InstName V1
SYMBOL cap -248 -232 R90
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL res 440 -312 R0
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL res 568 -200 R90
SYMATTR InstName R6
SYMATTR Value 1K
SYMBOL cap 568 -168 R270
SYMATTR InstName C3
SYMATTR Value 10n
SYMBOL res 760 -248 R0
SYMATTR InstName R7
SYMATTR Value 15K
SYMBOL res 760 -136 R0
SYMATTR InstName R8
SYMATTR Value 2K
SYMBOL cap 920 -344 R0
SYMATTR Value2 Rser=50m
SYMATTR Value 680
SYMATTR InstName C4
SYMBOL res 744 -8 R90
SYMATTR InstName R9
SYMATTR Value 100K
SYMBOL res 824 56 R90
SYMATTR InstName R10
SYMATTR Value 100K
SYMBOL res 744 120 R90
SYMATTR InstName R11
SYMATTR Value 100K
SYMBOL res 824 184 R90
SYMATTR InstName R12
SYMATTR Value 100K
SYMBOL cap 440 344 R0
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL res 1096 -360 R0
SYMATTR InstName Rload
SYMATTR Value 10