* SPICE netlist
R1 N009 0 10K
R2 OUT N012 20K
R3 N012 0 10K
R4 N008 OUT .006
C1 N010 N009 330p
C2 N013 0 43p
C3 N006 0 .001
C4 OUT 0 180 x4 Rser=.1
V1 IN 0 6
L1 N007 N008 1.5
MQ1 IN N005 N007 N007 Si4410DY
MQ2 N007 N011 0 0 Si4410DY
C5 N001 0 4.7
C6 N004 N007 .22
D1 N001 N004 1N5818
D2 0 N007 1N5818
XU1 N013 N006 N010 N003 0 N012 OUT N008 N002 0 N011 N001 IN N007 N004 N005 LTC1735 ;pnba Cosc)Run/SS)Ith)FCB)SGND)Vosense)Sense-)Sense+)EXTVcc)PGND)BG)INTVcc)Vin)SW)Boost)TG
Rload OUT 0 .5
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1632 688
WIRE -544 -344 -704 -344
WIRE 80 -344 -544 -344
WIRE -704 -328 -704 -344
WIRE -128 -328 -256 -328
WIRE 0 -328 -128 -328
WIRE 0 -312 0 -328
WIRE -544 -296 -544 -344
WIRE -400 -296 -400 -312
WIRE -256 -296 -256 -328
WIRE -128 -296 -128 -328
WIRE -704 -232 -704 -248
WIRE 0 -232 0 -248
WIRE 80 -232 80 -344
WIRE -624 -216 -640 -216
WIRE -128 -216 -128 -232
WIRE -128 -216 -176 -216
WIRE 32 -152 -176 -152
WIRE -128 -136 -128 -216
WIRE -736 -88 -816 -88
WIRE -624 -88 -672 -88
WIRE -128 -56 -128 -72
WIRE -128 -56 -176 -56
WIRE 80 -56 80 -136
WIRE 80 -56 -128 -56
WIRE 224 -56 80 -56
WIRE 256 -56 224 -56
WIRE 384 -56 336 -56
WIRE 400 -56 384 -56
WIRE 496 -56 480 -56
WIRE 576 -56 496 -56
WIRE 688 -56 576 -56
WIRE 816 -56 688 -56
WIRE 80 -40 80 -56
WIRE 688 -40 688 -56
WIRE 816 -40 816 -56
WIRE 224 -24 224 -56
WIRE 576 8 576 -56
WIRE -800 40 -816 40
WIRE -704 40 -720 40
WIRE -624 40 -640 40
WIRE 32 40 -176 40
WIRE 688 56 688 24
WIRE 816 56 816 40
WIRE 80 72 80 56
WIRE 224 72 224 40
WIRE 576 104 576 88
WIRE 576 104 528 104
WIRE 384 120 384 -56
WIRE 384 120 -176 120
WIRE 576 120 576 104
WIRE -720 168 -768 168
WIRE -624 168 -656 168
WIRE 496 184 496 -56
WIRE 496 184 -176 184
WIRE 576 216 576 200
WIRE 528 248 528 104
WIRE 528 248 -176 248
WIRE -512 344 -512 312
WIRE -288 344 -288 312
FLAG -512 344 0
FLAG -288 344 0
FLAG -816 40 0
FLAG -816 -88 0
FLAG 576 216 0
FLAG 816 56 0
FLAG 688 56 0
FLAG -704 -232 0
FLAG 80 72 0
FLAG -768 168 0
FLAG 816 -56 OUT
FLAG 0 -232 0
FLAG 224 72 0
FLAG -704 -344 IN
SYMBOL RES -704 24 R90
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res 560 -8 R0
SYMATTR InstName R2
SYMATTR Value 20K
SYMBOL res 560 104 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 384 -72 M90
SYMATTR InstName R4
SYMATTR Value .006
SYMBOL cap -640 24 R90
SYMATTR InstName C1
SYMATTR Value 330p
SYMBOL cap -656 152 R90
SYMATTR InstName C2
SYMATTR Value 43p
SYMBOL cap -672 -104 R90
SYMATTR InstName C3
SYMATTR Value .001
SYMBOL polcap 672 -40 R0
SYMATTR Value2 x4
SYMATTR Value 180
SYMATTR InstName C4
SYMATTR SpiceLine Rser=.1
SYMBOL VOLTAGE -704 -344 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL ind 240 -40 R270
SYMATTR InstName L1
SYMATTR Value 1.5
SYMBOL NMOS 32 -232 R0
SYMATTR InstName Q1
SYMATTR Value Si4410DY
SYMBOL nmos 32 -40 R0
SYMATTR InstName Q2
SYMATTR Value Si4410DY
SYMBOL cap -16 -312 R0
SYMATTR InstName C5
SYMATTR Value 4.7
SYMBOL cap -144 -136 R0
SYMATTR InstName C6
SYMATTR Value .22
SYMBOL schottky -144 -296 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL schottky 208 40 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL POWERPRODUCTS\\LTC1735 -400 -24 R0
SYMATTR InstName U1
SYMBOL res 800 -56 R0
SYMATTR InstName Rload
SYMATTR Value .5