* SPICE netlist
C2 OUT 0 200 Rser=.1
L1 N005 N010 10 Rser=0.0005
V1 IN 0 12
C3 N006 N007 330p
C4 N004 0 .01
C5 N012 0 100p
R1 N010 OUT 0.033
R2 N012 0 11K
R3 OUT N012 35.7K
C6 OUT N010 1000p
C7 OUT N012 100p
C8 N002 0 68p
D1 N009 N008 MBRS340
C9 N005 N008 .1
C10 N009 0 4.7
D2 0 N005 MBRS140
MQ1 IN N003 N005 N005 Si4412DY
MQ2 N005 N011 0 0 Si4412DY
C11 0 N006 51p
R4 N006 0 10K
XU1 N002 N004 N007 IN 0 N012 OUT N010 N001 0 N011 N009 IN N005 N008 N003 LTC1435A ;pnba OSC)SOFT)Ith)SFB)SGND)Vosense)SEN-)SEN+)ExtVcc)PGND)BG)IntVcc)Vin)SW)Boost)TG
Rload OUT 0 10
.tran 9m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1552 720
WIRE -328 -360 -536 -360
WIRE 104 -360 -328 -360
WIRE 296 -360 104 -360
WIRE -328 -344 -328 -360
WIRE 296 -344 296 -360
WIRE 104 -296 104 -360
WIRE -536 -280 -536 -360
WIRE -504 -280 -536 -280
WIRE -136 -280 -152 -280
WIRE 296 -248 296 -264
WIRE -584 -216 -600 -216
WIRE -504 -216 -520 -216
WIRE 56 -216 -152 -216
WIRE -696 -152 -776 -152
WIRE -504 -152 -632 -152
WIRE -72 -152 -152 -152
WIRE 104 -152 104 -200
WIRE 104 -152 -72 -152
WIRE -760 -88 -776 -88
WIRE -600 -88 -680 -88
WIRE -584 -88 -600 -88
WIRE -504 -88 -520 -88
WIRE -72 -88 -152 -88
WIRE -696 -24 -776 -24
WIRE -600 -24 -600 -88
WIRE -600 -24 -632 -24
WIRE -72 -24 -152 -24
WIRE 104 -24 104 -152
WIRE 232 -24 104 -24
WIRE 280 -24 232 -24
WIRE 392 -24 360 -24
WIRE 424 -24 392 -24
WIRE 536 -24 504 -24
WIRE 616 -24 536 -24
WIRE 680 -24 616 -24
WIRE 776 -24 680 -24
WIRE -72 -8 -72 -24
WIRE 104 -8 104 -24
WIRE 680 -8 680 -24
WIRE 776 -8 776 -24
WIRE 232 8 232 -24
WIRE -504 40 -520 40
WIRE -136 40 -152 40
WIRE -136 72 -136 40
WIRE 56 72 -136 72
WIRE 680 88 680 56
WIRE 776 88 776 72
WIRE -616 104 -632 104
WIRE -536 104 -552 104
WIRE -504 104 -536 104
WIRE -72 104 -72 56
WIRE -72 104 -152 104
WIRE 104 104 104 88
WIRE 104 104 -72 104
WIRE 232 104 232 72
WIRE 232 104 104 104
WIRE 104 136 104 104
WIRE 616 216 616 -24
WIRE 712 216 616 216
WIRE -424 248 -424 184
WIRE -360 248 -424 248
WIRE -232 248 -232 184
WIRE -232 248 -296 248
WIRE 392 248 392 -24
WIRE 392 248 -232 248
WIRE 616 248 616 216
WIRE 712 248 712 216
WIRE -424 312 -424 248
WIRE 536 312 536 -24
WIRE 536 312 -424 312
WIRE -680 360 -696 360
WIRE -536 360 -536 104
WIRE -536 360 -600 360
WIRE 616 360 616 328
WIRE 616 360 -536 360
WIRE 712 360 712 312
WIRE 712 360 616 360
FLAG 296 -248 0
FLAG 776 88 0
FLAG 680 88 0
FLAG 776 -24 OUT
FLAG -696 360 0
FLAG 104 136 0
FLAG 296 -360 IN
FLAG -600 -216 0
FLAG -776 -152 0
FLAG -776 -88 0
FLAG -776 -24 0
FLAG -520 40 0
FLAG -632 104 0
SYMBOL POLCAP 664 -8 R0
SYMATTR InstName C2
SYMATTR Value 200
SYMATTR SpiceLine Rser=.1
SYMBOL IND 264 -8 R270
SYMATTR InstName L1
SYMATTR Value 10
SYMATTR SpiceLine Rser=0.0005
SYMBOL VOLTAGE 296 -360 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL CAP -584 -104 M90
SYMATTR InstName C3
SYMATTR Value 330p
SYMBOL CAP -632 -168 R90
SYMATTR InstName C4
SYMATTR Value .01
SYMBOL CAP -552 88 R90
SYMATTR InstName C5
SYMATTR Value 100p
SYMBOL RES 408 -8 R270
SYMATTR InstName R1
SYMATTR Value 0.033
SYMBOL RES -584 344 R90
SYMATTR InstName R2
SYMATTR Value 11K
SYMBOL RES 600 232 R0
SYMATTR InstName R3
SYMATTR Value 35.7K
SYMBOL CAP -360 264 R270
SYMATTR InstName C6
SYMATTR Value 1000p
SYMBOL CAP 696 248 R0
SYMATTR InstName C7
SYMATTR Value 100p
SYMBOL CAP -520 -232 R90
SYMATTR InstName C8
SYMATTR Value 68p
SYMBOL schottky -88 -24 M180
SYMATTR InstName D1
SYMATTR Value MBRS340
SYMBOL CAP -88 -152 R0
SYMATTR InstName C9
SYMATTR Value .1
SYMBOL polcap -88 -8 R0
SYMATTR InstName C10
SYMATTR Value 4.7
SYMBOL schottky 216 72 M180
SYMATTR InstName D2
SYMATTR Value MBRS140
SYMBOL NMOS 56 -296 R0
SYMATTR InstName Q1
SYMATTR Value Si4412DY
SYMBOL nmos 56 -8 R0
SYMATTR InstName Q2
SYMATTR Value Si4412DY
SYMBOL CAP -696 -40 M90
SYMATTR InstName C11
SYMATTR Value 51p
SYMBOL RES -664 -72 M270
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL PowerProducts\\LTC1435A -328 -56 R0
SYMATTR InstName U1
SYMBOL res 760 -24 R0
SYMATTR InstName Rload
SYMATTR Value 10