* SPICE netlist
R1 N014 0 100K
C1 N012 0 .0025
C2 OUT 0 330
R2 N010 N011 110K
R3 N011 0 24.9K
XU1 N004 N007 N009 N014 0 N011 N013 N012 N010 OUT 0 0 N015 0 0 N008 0 N005 N005 N001 NC_01 N006 0 N005 LTC3706 ;pnba SG)FG)Pgood)Mode)Phase)FB)Ith)Run/SS)Vsout)Vs+)Vs-)GND)FS/Sync)SLP)Is-)Is+)RegSD)NDRV)Vin)SW)PT-)PT+)PGND)Vcc
R4 N015 0 100K
C3 N013 0 330p Rser=24K
L1 IN N002 490 Rpar=10K
L2 N001 N003 40 Rpar=2K
MQ1 N002 N006 N008 N008 Si4484EY
R5 N008 0 20m
V1 IN 0 36
MQ2 N003 N007 0 0 Si4490DY
MQ3 N001 N004 0 0 Si4490DY
R6 N005 N009 20K
V2 N005 0 7.5
L3 N001 OUT 1.5 Rpar=2K
Rload OUT 0 1
.tran 1m startup
K1 L1 L2 1

* LTspice schematic (.asc)
Version 4
SHEET 1 1200 752
WIRE -472 -376 -600 -376
WIRE -168 -376 -328 -376
WIRE -8 -376 -168 -376
WIRE 216 -376 -8 -376
WIRE 392 -376 296 -376
WIRE 424 -376 392 -376
WIRE 520 -376 424 -376
WIRE -600 -360 -600 -376
WIRE -472 -360 -472 -376
WIRE -424 -360 -472 -360
WIRE -328 -360 -328 -376
WIRE -328 -360 -376 -360
WIRE -8 -360 -8 -376
WIRE 424 -360 424 -376
WIRE 520 -360 520 -376
WIRE -424 -280 -472 -280
WIRE -328 -280 -376 -280
WIRE -56 -280 -72 -280
WIRE -600 -264 -600 -280
WIRE -472 -264 -472 -280
WIRE -328 -264 -328 -280
WIRE 424 -264 424 -296
WIRE 520 -264 520 -280
WIRE -8 -248 -8 -264
WIRE 120 -232 104 -232
WIRE 216 -232 200 -232
WIRE 312 -232 216 -232
WIRE 312 -216 312 -232
WIRE -520 -184 -536 -184
WIRE -264 -184 -280 -184
WIRE -472 -152 -472 -168
WIRE -472 -152 -504 -152
WIRE -328 -152 -328 -168
WIRE 120 -152 24 -152
WIRE 216 -152 216 -232
WIRE 216 -152 120 -152
WIRE -472 -136 -472 -152
WIRE -264 -120 -264 -184
WIRE -168 -120 -168 -376
WIRE -72 -120 -72 -280
WIRE 24 -120 24 -152
WIRE 120 -120 120 -152
WIRE 216 -120 216 -152
WIRE 312 -120 312 -136
WIRE -328 -56 -360 -56
WIRE 392 -56 392 -376
WIRE 392 -56 376 -56
WIRE -472 -40 -472 -56
WIRE -504 8 -504 -152
WIRE -328 8 -504 8
WIRE 392 8 376 8
WIRE -536 72 -536 -184
WIRE -328 72 -536 72
WIRE 392 72 376 72
WIRE 488 72 472 72
WIRE 504 72 488 72
WIRE 600 72 584 72
WIRE 488 136 488 72
WIRE 488 136 376 136
WIRE -408 200 -424 200
WIRE -328 200 -344 200
WIRE 424 200 376 200
WIRE 504 200 488 200
WIRE 216 280 216 264
WIRE 312 280 312 264
WIRE -264 296 -264 264
WIRE -168 296 -168 264
WIRE -72 296 -72 264
WIRE 24 296 24 264
WIRE 120 296 120 264
WIRE 216 376 216 360
WIRE 312 376 312 360
FLAG -168 296 0
FLAG -264 296 0
FLAG -72 296 0
FLAG 216 376 0
FLAG -424 200 0
FLAG 504 200 0
FLAG -8 -248 0
FLAG 424 -264 0
FLAG 520 -264 0
FLAG 600 72 0
FLAG 24 296 0
FLAG 120 296 0
FLAG 312 376 0
FLAG 392 8 0
FLAG -472 -40 0
FLAG -360 -56 0
FLAG -600 -264 0
FLAG -328 -152 0
FLAG -600 -376 IN
FLAG 520 -376 OUT
FLAG 104 -232 0
SYMBOL res 200 264 R0
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL cap -344 184 R90
SYMATTR Value .0025
SYMATTR InstName C1
SYMBOL cap 408 -360 R0
SYMATTR InstName C2
SYMATTR Value 330
SYMBOL res 376 88 R270
SYMATTR InstName R2
SYMATTR Value 110K
SYMBOL res 488 88 R270
SYMATTR InstName R3
SYMATTR Value 24.9K
SYMBOL PowerProducts\\LTC3706 24 72 R0
SYMATTR InstName U1
SYMBOL res 296 264 R0
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL cap 424 216 R270
SYMATTR Value 330p
SYMATTR SpiceLine Rser=24K
SYMATTR InstName C3
SYMBOL ind2 -440 -376 R0
SYMATTR InstName L1
SYMATTR Value 490
SYMATTR Type ind
SYMATTR SpiceLine Rpar=10K
SYMBOL ind2 -360 -376 M0
SYMATTR InstName L2
SYMATTR Value 40
SYMATTR Type ind
SYMATTR SpiceLine Rpar=2K
SYMBOL nmos -520 -264 R0
SYMATTR InstName Q1
SYMATTR Value Si4484EY
SYMBOL res -488 -152 R0
SYMATTR InstName R5
SYMATTR Value 20m
SYMBOL voltage -600 -376 R0
SYMATTR InstName V1
SYMATTR Value 36
SYMBOL nmos -280 -264 M0
SYMATTR InstName Q2
SYMATTR Value Si4490DY
SYMBOL nmos -56 -360 R0
SYMATTR InstName Q3
SYMATTR Value Si4490DY
SYMBOL res 296 -232 R0
SYMATTR InstName R6
SYMATTR Value 20K
SYMBOL voltage 216 -232 R90
SYMATTR Value 7.5
SYMATTR InstName V2
SYMBOL ind 200 -360 R270
SYMATTR InstName L3
SYMATTR Value 1.5
SYMATTR SpiceLine Rpar=2K
SYMBOL res 504 -376 R0
SYMATTR InstName Rload
SYMATTR Value 1