* SPICE netlist
L1 N008 OUT 2
V1 IN 0 5
MQ1 N008 N009 0 0 Si4410DY m=2
C1 N010 0 150p
C2 N011 0 .01
R1 N011 N010 8.2K
R2 IN N003 2.7K
MQ2 IN N005 N008 N008 Si4410DY m=2
R3 N008 N007 20
C3 OUT 0 330 x7 Rser=.1
C4 N012 0 .01
R4 IN N002 5.6K
R5 IN N004 5.6K
R6 IN N006 5.6K
V2 N001 0 12
C9 OUT 0 .1
XU1 N009 N001 0 0 IN OUT N003 N007 N012 N010 N006 N004 N002 0 0 0 0 0 IN N005 LTC1553 ;pnba G2)PVcc)PGND)SGND)Vcc)Sense)Imax)Ifb)SS)Comp)_OT)_FAULT)PWRGD)VID4)VID3)VID2)VID1)VID0)OUTEN)G1
Rload OUT 0 .2
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1408 752
WIRE -656 -376 -704 -376
WIRE -560 -376 -656 -376
WIRE -464 -376 -560 -376
WIRE -256 -376 -464 -376
WIRE 256 -376 -256 -376
WIRE 368 -376 256 -376
WIRE 464 -376 368 -376
WIRE 64 -360 -96 -360
WIRE 464 -360 464 -376
WIRE 64 -344 64 -360
WIRE -464 -328 -464 -376
WIRE 256 -328 256 -376
WIRE -256 -296 -256 -376
WIRE -96 -296 -96 -360
WIRE -560 -264 -560 -376
WIRE 464 -264 464 -280
WIRE 64 -248 64 -264
WIRE -464 -232 -464 -248
WIRE -368 -232 -464 -232
WIRE -656 -216 -656 -376
WIRE 256 -216 256 -248
WIRE 256 -216 16 -216
WIRE 368 -216 368 -376
WIRE -560 -168 -560 -184
WIRE -368 -168 -560 -168
WIRE 320 -136 16 -136
WIRE -656 -104 -656 -136
WIRE -368 -104 -656 -104
WIRE 64 -56 16 -56
WIRE 368 -56 368 -120
WIRE 368 -56 144 -56
WIRE 432 -56 368 -56
WIRE 560 -56 512 -56
WIRE 608 -56 560 -56
WIRE 704 -56 608 -56
WIRE -368 -40 -400 -40
WIRE 704 -40 704 -56
WIRE 608 -24 608 -56
WIRE -400 24 -400 -40
WIRE -368 24 -400 24
WIRE 320 24 16 24
WIRE 608 56 608 40
WIRE 704 56 704 40
WIRE 368 72 368 40
WIRE -400 88 -400 24
WIRE -400 88 -432 88
WIRE -368 88 -400 88
WIRE 400 104 16 104
WIRE 560 104 560 -56
WIRE 560 104 400 104
WIRE 400 120 400 104
WIRE -400 152 -400 88
WIRE -368 152 -400 152
WIRE 144 184 16 184
WIRE 192 184 144 184
WIRE 288 184 272 184
WIRE 144 200 144 184
WIRE 288 200 288 184
WIRE 400 200 400 184
WIRE -400 216 -400 152
WIRE -368 216 -400 216
WIRE 64 264 16 264
WIRE -704 280 -704 -376
WIRE -368 280 -704 280
WIRE 64 280 64 264
WIRE 144 280 144 264
WIRE 288 280 288 264
WIRE -256 376 -256 344
WIRE -96 376 -96 344
WIRE 64 376 64 344
FLAG 608 56 0
FLAG 704 56 0
FLAG 704 -56 OUT
FLAG 368 72 0
FLAG 288 280 0
FLAG 144 280 0
FLAG 64 376 0
FLAG -256 376 0
FLAG -96 376 0
FLAG 464 -264 0
FLAG -432 88 0
FLAG 64 -248 0
FLAG 400 200 0
FLAG 464 -376 IN
SYMBOL ind 416 -40 R270
SYMATTR InstName L1
SYMATTR Value 2
SYMBOL VOLTAGE 464 -376 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL NMOS 320 -56 R0
SYMATTR Value2 m=2
SYMATTR InstName Q1
SYMATTR Value Si4410DY
SYMBOL cap 128 200 R0
SYMATTR InstName C1
SYMATTR Value 150p
SYMBOL cap 272 200 R0
SYMATTR InstName C2
SYMATTR Value .01
SYMBOL res 288 168 R90
SYMATTR InstName R1
SYMATTR Value 8.2K
SYMBOL res 240 -344 R0
SYMATTR InstName R2
SYMATTR Value 2.7K
SYMBOL NMOS 320 -216 R0
SYMATTR InstName Q2
SYMATTR Value Si4410DY
SYMATTR Value2 m=2
SYMBOL res 160 -72 R90
SYMATTR InstName R3
SYMATTR Value 20
SYMBOL polcap 592 -24 R0
SYMATTR Value2 x7
SYMATTR Value 330
SYMATTR SpiceLine Rser=.1
SYMATTR InstName C3
SYMBOL cap 48 280 R0
SYMATTR InstName C4
SYMATTR Value .01
SYMBOL res -480 -344 R0
SYMATTR InstName R4
SYMATTR Value 5.6K
SYMBOL res -576 -280 R0
SYMATTR InstName R5
SYMATTR Value 5.6K
SYMBOL res -672 -232 R0
SYMATTR InstName R6
SYMATTR Value 5.6K
SYMBOL VOLTAGE 64 -360 R0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL cap 384 120 R0
SYMATTR InstName C9
SYMATTR Value .1
SYMBOL PowerProducts\\LTC1553L -176 24 R0
SYMATTR InstName U1
SYMBOL res 688 -56 R0
SYMATTR InstName Rload
SYMATTR Value .2