* SPICE netlist
C1 N001 0 4.7
V1 IN 0 12
C3 OUT 0 220 Rser=10m
R4 N009 0 12.1K
R5 OUT N009 232K
R6 IN N006 4m
L2 N006 N005 3.3 Rser=10m
MQ3 OUT N003 N005 N005 Si4840DY
MQ4 N005 N007 0 0 Si4840DY
C6 N004 N005 .1
D2 N001 N004 MBR0540
Rload OUT 0 4.8
C2 N008 0 0.1
XU1 IN 0 N009 N010 0 0 N002 0 N006 IN N008 NC_01 NC_02 NC_03 N005 N003 N004 N007 N001 LTC3769 ;pnba VBIAS)FREQ)FB)ITH)PLLIN/MODE)GND)RUN)OVMODE)SENSE-)SENSE+)SS)ILIM)PGOOD)EXTVCC)SW)TG)BOOST)BG)INTVCC
R1 N010 N011 12.1K
C4 N010 0 100p
C5 N011 0 15n
.tran 30m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1264 1152
WIRE -568 -576 -600 -576
WIRE -248 -576 -568 -576
WIRE 440 -576 -248 -576
WIRE -600 -544 -600 -576
WIRE 8 -544 -520 -544
WIRE 8 -496 8 -544
WIRE -248 -480 -248 -576
WIRE -600 -448 -600 -464
WIRE -24 -416 -56 -416
WIRE 488 -416 136 -416
WIRE 536 -416 488 -416
WIRE 632 -416 536 -416
WIRE 136 -400 136 -416
WIRE 632 -400 632 -416
WIRE 536 -384 536 -416
WIRE -520 -320 -520 -544
WIRE -424 -320 -520 -320
WIRE 88 -320 -56 -320
WIRE -520 -304 -520 -320
WIRE 536 -304 536 -320
WIRE 632 -304 632 -320
WIRE -520 -224 -520 -240
WIRE 8 -224 8 -432
WIRE 8 -224 -56 -224
WIRE 8 -208 8 -224
WIRE -424 -128 -472 -128
WIRE 8 -128 8 -144
WIRE 8 -128 -56 -128
WIRE 136 -128 136 -304
WIRE 136 -128 8 -128
WIRE 184 -128 136 -128
WIRE 296 -128 264 -128
WIRE 312 -128 296 -128
WIRE 408 -128 392 -128
WIRE 440 -128 440 -576
WIRE 440 -128 408 -128
WIRE 136 -112 136 -128
WIRE 88 -32 -56 -32
WIRE 136 16 136 -16
WIRE -424 64 -472 64
WIRE 408 64 408 -128
WIRE 408 64 -56 64
WIRE -424 160 -472 160
WIRE 296 160 296 -128
WIRE 296 160 -56 160
WIRE 488 160 488 -416
WIRE -520 256 -536 256
WIRE -424 256 -456 256
WIRE 488 256 488 240
WIRE 488 256 -56 256
WIRE 488 272 488 256
WIRE -520 352 -616 352
WIRE -424 352 -520 352
WIRE -40 352 -56 352
WIRE 488 368 488 352
WIRE -616 384 -616 352
WIRE -520 384 -520 352
WIRE -616 464 -616 448
WIRE -520 480 -520 464
WIRE -520 576 -520 544
FLAG -520 -224 0
FLAG -600 -448 0
FLAG 536 -304 0
FLAG 632 -304 0
FLAG 632 -416 OUT
FLAG -568 -576 IN
FLAG 488 368 0
FLAG -472 64 0
FLAG -520 576 0
FLAG 136 16 0
FLAG -536 256 0
FLAG -472 -128 0
FLAG -472 160 0
FLAG -40 352 0
FLAG -616 464 0
SYMBOL cap -536 -304 R0
SYMATTR Value 4.7
SYMATTR InstName C1
SYMBOL voltage -600 -560 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap 520 -384 R0
SYMATTR InstName C3
SYMATTR Value 220
SYMATTR SpiceLine Rser=10m
SYMBOL res 472 256 R0
SYMATTR InstName R4
SYMATTR Value 12.1K
SYMBOL res 472 144 R0
SYMATTR InstName R5
SYMATTR Value 232K
SYMBOL res 408 -144 R90
SYMATTR InstName R6
SYMATTR Value 4m
SYMBOL ind 280 -112 M270
SYMATTR InstName L2
SYMATTR Value 3.3
SYMATTR SpiceLine Rser=10m
SYMBOL nmos 88 -400 R0
SYMATTR InstName Q3
SYMATTR Value Si4840DY
SYMBOL nmos 88 -112 R0
SYMATTR InstName Q4
SYMATTR Value Si4840DY
SYMBOL cap -8 -208 R0
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL schottky -8 -496 R0
SYMATTR Value MBR0540
SYMATTR InstName D2
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 616 -416 R0
SYMATTR InstName Rload
SYMATTR Value 4.8
SYMBOL cap -456 240 R90
SYMATTR InstName C2
SYMATTR Value 0.1
SYMBOL LTC3769 -248 -32 R0
SYMATTR InstName U1
SYMBOL res -536 368 R0
SYMATTR InstName R1
SYMATTR Value 12.1K
SYMBOL cap -632 384 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap -536 480 R0
SYMATTR InstName C5
SYMATTR Value 15n