* 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 N010 N011 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 .1
.tran 2.5m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1424 752
WIRE -664 -376 -712 -376
WIRE -568 -376 -664 -376
WIRE -472 -376 -568 -376
WIRE -264 -376 -472 -376
WIRE 248 -376 -264 -376
WIRE 360 -376 248 -376
WIRE 456 -376 360 -376
WIRE 72 -360 -104 -360
WIRE 456 -360 456 -376
WIRE 72 -344 72 -360
WIRE -472 -328 -472 -376
WIRE 248 -328 248 -376
WIRE -264 -296 -264 -376
WIRE -104 -296 -104 -360
WIRE -568 -280 -568 -376
WIRE 456 -264 456 -280
WIRE 72 -248 72 -264
WIRE -472 -232 -472 -248
WIRE -376 -232 -472 -232
WIRE 248 -216 248 -248
WIRE 248 -216 8 -216
WIRE 360 -216 360 -376
WIRE -664 -200 -664 -376
WIRE -568 -168 -568 -200
WIRE -376 -168 -568 -168
WIRE 312 -136 8 -136
WIRE -664 -104 -664 -120
WIRE -376 -104 -664 -104
WIRE 56 -56 8 -56
WIRE 360 -56 360 -120
WIRE 360 -56 136 -56
WIRE 424 -56 360 -56
WIRE 552 -56 504 -56
WIRE 600 -56 552 -56
WIRE 712 -56 600 -56
WIRE -376 -40 -408 -40
WIRE 600 -40 600 -56
WIRE 712 -40 712 -56
WIRE -408 24 -408 -40
WIRE -376 24 -408 24
WIRE 312 24 8 24
WIRE 600 56 600 24
WIRE 712 56 712 40
WIRE 360 72 360 40
WIRE -408 88 -408 24
WIRE -408 88 -440 88
WIRE -376 88 -408 88
WIRE 392 104 8 104
WIRE 552 104 552 -56
WIRE 552 104 392 104
WIRE 392 120 392 104
WIRE -408 152 -408 88
WIRE -376 152 -408 152
WIRE 120 184 8 184
WIRE 168 184 120 184
WIRE 264 184 248 184
WIRE 392 200 392 184
WIRE -408 216 -408 152
WIRE -376 216 -408 216
WIRE 120 216 120 184
WIRE 264 216 264 184
WIRE 56 264 8 264
WIRE -712 280 -712 -376
WIRE -376 280 -712 280
WIRE 56 280 56 264
WIRE 120 296 120 280
WIRE 264 296 264 280
WIRE -264 376 -264 344
WIRE -104 376 -104 344
WIRE 56 376 56 344
FLAG 600 56 0
FLAG 712 56 0
FLAG 712 -56 OUT
FLAG 360 72 0
FLAG 264 296 0
FLAG 120 296 0
FLAG 56 376 0
FLAG -264 376 0
FLAG -104 376 0
FLAG 456 -264 0
FLAG -440 88 0
FLAG 72 -248 0
FLAG 392 200 0
FLAG 456 -376 IN
SYMBOL ind 408 -40 R270
SYMATTR InstName L1
SYMATTR Value 2
SYMBOL VOLTAGE 456 -376 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL NMOS 312 -56 R0
SYMATTR Value2 m=2
SYMATTR InstName Q1
SYMATTR Value Si4410DY
SYMBOL cap 104 216 R0
SYMATTR InstName C1
SYMATTR Value 150p
SYMBOL cap 248 216 R0
SYMATTR InstName C2
SYMATTR Value .01
SYMBOL res 152 200 R270
SYMATTR InstName R1
SYMATTR Value 8.2K
SYMBOL res 232 -344 R0
SYMATTR InstName R2
SYMATTR Value 2.7K
SYMBOL NMOS 312 -216 R0
SYMATTR InstName Q2
SYMATTR Value Si4410DY
SYMATTR Value2 m=2
SYMBOL res 152 -72 R90
SYMATTR InstName R3
SYMATTR Value 20
SYMBOL polcap 584 -40 R0
SYMATTR Value2 x7
SYMATTR Value 330
SYMATTR SpiceLine Rser=.1
SYMATTR InstName C3
SYMBOL cap 40 280 R0
SYMATTR InstName C4
SYMATTR Value .01
SYMBOL res -488 -344 R0
SYMATTR InstName R4
SYMATTR Value 5.6K
SYMBOL res -584 -296 R0
SYMATTR InstName R5
SYMATTR Value 5.6K
SYMBOL res -680 -216 R0
SYMATTR InstName R6
SYMATTR Value 5.6K
SYMBOL VOLTAGE 72 -360 R0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL cap 376 120 R0
SYMATTR InstName C9
SYMATTR Value .1
SYMBOL PowerProducts\\LTC1553 -184 24 R0
SYMATTR InstName U1
SYMBOL res 696 -56 R0
SYMATTR InstName Rload
SYMATTR Value .1