* SPICE netlist
C1 N022 0 20n
C2 N024 0 10n Rser=5.1K
V1 IN 0 32
R1 IN N001 3m
R2 IN N005 499K
R3 N005 0 56.2K
R4 N003 N001 50
C3 IN N003 470n
C4 0 N004 4.7
R5 IN N007 499K
R6 N007 0 27.4K
R7 N023 0 147K
C5 N021 0 .1
MQ1 N001 N010 N013 N013 RJK0651DPB
MQ2 N013 N016 N019 N019 RJK0651DPB
L1 N013 N014 10 Rser=20m Rpar=5K
C6 N008 N013 .1
D1 N004 N008 MBRS1100
C7 N006 N014 .1
D2 N004 N006 MBRS1100
MQ3 N002 N011 N014 N014 Si4840DY
MQ4 N014 N017 N019 N019 Si4840DY
R8 N019 0 4m
R9 OUT N026 73.2K
R10 N026 0 3.83K
R11 N002 OUT 15m
C8 N002 0 4.7 x2 V=50 Irms=0 Rser=0.004 Lser=0 mfg="TDK" pn="C575OX7RIH475M" type="X7R"
XU1 N021 N022 N021 N020 N018 N021 N015 N012 N005 IN N003 N001 N004 N010 N008 N013 0 N016 N017 MP_01 N014 N006 MP_02 N011 N002 OUT N019 0 MP_03 0 N025 N020 N009 0 N023 N024 N026 N007 LT3791-1 ;pnba CTRL)SS)PWM)_C/10)_SHORT)Vref)ISmon)IVinmon)EN/UVLO)IVinP)IVinN)Vin)INTVcc)TG1)BST1)SW1)PGND)BG1)BG2))SW2)BST2))TG2)ISP)ISN)SNSP)SNSN))SGND)PWMOUT)CCM)CLKOUT)SYNC)RT)Vc)FB)OVLO
C9 N002 0 220 V=35 Irms=760m Rser=0.09 Lser=0 mfg="Panasonic" pn="ECA1VFQ221" type="Al electrolytic"
Rload OUT 0 4.8
R12 N004 N018 200K
R13 N004 N020 100K
R14 N021 N022 100K
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2096 1376
WIRE 296 -688 -360 -688
WIRE -920 -672 -1048 -672
WIRE -808 -672 -920 -672
WIRE -552 -672 -808 -672
WIRE -488 -672 -552 -672
WIRE -360 -672 -360 -688
WIRE -360 -672 -408 -672
WIRE 1000 -672 -264 -672
WIRE -1048 -656 -1048 -672
WIRE 872 -656 -168 -656
WIRE -552 -592 -552 -672
WIRE -536 -592 -552 -592
WIRE -456 -592 -472 -592
WIRE -440 -592 -456 -592
WIRE -360 -592 -360 -672
WIRE -1048 -560 -1048 -576
WIRE -808 -560 -808 -672
WIRE -72 -544 -72 -560
WIRE -72 -544 -712 -544
WIRE 24 -544 -72 -544
WIRE 152 -544 24 -544
WIRE -552 -528 -552 -592
WIRE -456 -528 -456 -592
WIRE -360 -528 -360 -592
WIRE -264 -528 -264 -672
WIRE -168 -528 -168 -656
WIRE -72 -528 -72 -544
WIRE -808 -464 -808 -480
WIRE -616 -464 -808 -464
WIRE 24 -464 24 -480
WIRE 24 -464 -8 -464
WIRE 504 -464 24 -464
WIRE -808 -448 -808 -464
WIRE -920 -416 -920 -672
WIRE -616 -368 -632 -368
WIRE 152 -368 152 -480
WIRE 152 -368 -8 -368
WIRE 760 -368 568 -368
WIRE 872 -368 872 -656
WIRE 872 -368 760 -368
WIRE 904 -368 872 -368
WIRE 1000 -368 1000 -672
WIRE 1000 -368 984 -368
WIRE 1048 -368 1000 -368
WIRE -808 -352 -808 -368
WIRE 152 -352 152 -368
WIRE 296 -352 296 -688
WIRE 568 -352 568 -368
WIRE 1048 -352 1048 -368
WIRE 760 -336 760 -368
WIRE 872 -336 872 -368
WIRE -920 -320 -920 -336
WIRE -632 -320 -632 -368
WIRE -632 -320 -920 -320
WIRE -920 -304 -920 -320
WIRE 504 -304 504 -464
WIRE -616 -272 -632 -272
WIRE 248 -272 -8 -272
WIRE 712 -272 616 -272
WIRE 760 -256 760 -272
WIRE 872 -256 872 -272
WIRE 1048 -256 1048 -272
WIRE -920 -208 -920 -224
WIRE -616 -176 -632 -176
WIRE 152 -176 152 -288
WIRE 152 -176 -8 -176
WIRE 296 -176 296 -256
WIRE 296 -176 152 -176
WIRE 376 -176 296 -176
WIRE 504 -176 504 -240
WIRE 504 -176 456 -176
WIRE 568 -176 568 -256
WIRE 568 -176 504 -176
WIRE 680 -176 568 -176
WIRE 296 -160 296 -176
WIRE 568 -160 568 -176
WIRE -712 -128 -712 -544
WIRE -712 -128 -776 -128
WIRE -712 -80 -712 -128
WIRE -616 -80 -632 -80
WIRE 248 -80 -8 -80
WIRE 648 -80 616 -80
WIRE -776 16 -776 -128
WIRE -712 16 -712 0
WIRE -616 16 -712 16
WIRE 296 16 296 -64
WIRE 296 16 -8 16
WIRE 424 16 296 16
WIRE 568 16 568 -64
WIRE 568 16 424 16
WIRE 424 32 424 16
WIRE -776 112 -776 96
WIRE -632 112 -776 112
WIRE -616 112 -632 112
WIRE 8 112 -8 112
WIRE 424 128 424 112
WIRE -632 208 -632 112
WIRE -616 208 -632 208
WIRE 8 208 -8 208
WIRE -712 304 -728 304
WIRE -632 304 -648 304
WIRE -616 304 -632 304
WIRE 648 304 648 -80
WIRE 648 304 -8 304
WIRE -632 400 -632 304
WIRE -616 400 -632 400
WIRE 680 400 680 -176
WIRE 680 400 -8 400
WIRE 1000 480 1000 -368
WIRE -632 496 -632 400
WIRE -632 496 -680 496
WIRE -616 496 -632 496
WIRE 712 496 712 -272
WIRE 712 496 -8 496
WIRE -680 528 -680 496
WIRE -552 576 -552 560
WIRE -472 576 -472 560
WIRE -472 576 -504 576
WIRE -392 576 -392 560
WIRE -312 576 -312 560
WIRE -232 576 -232 560
WIRE -152 576 -152 560
WIRE -72 576 -72 560
WIRE 1000 576 1000 560
WIRE 1000 576 -72 576
WIRE 1000 592 1000 576
WIRE -680 624 -680 608
WIRE -504 624 -504 576
WIRE -504 624 -680 624
WIRE -472 656 -472 640
WIRE -232 656 -232 640
WIRE -312 672 -312 656
WIRE 1000 688 1000 672
FLAG -552 576 0
FLAG -472 656 0
FLAG -392 576 0
FLAG -232 656 0
FLAG -1048 -560 0
FLAG -808 -352 0
FLAG -72 -624 0
FLAG -920 -208 0
FLAG -312 672 0
FLAG -728 304 0
FLAG 8 208 0
FLAG 424 128 0
FLAG 8 112 0
FLAG 1000 688 0
FLAG -1048 -672 IN
FLAG 1048 -368 OUT
FLAG 760 -256 0
FLAG 872 -256 0
FLAG 1048 -256 0
SYMBOL cap -488 576 R0
SYMATTR InstName C1
SYMATTR Value 20n
SYMBOL cap -248 576 R0
SYMATTR Value 10n
SYMATTR SpiceLine Rser=5.1K
SYMATTR InstName C2
SYMBOL voltage -1048 -672 R0
SYMATTR InstName V1
SYMATTR Value 32
SYMBOL res -504 -656 R270
SYMATTR InstName R1
SYMATTR Value 3m
SYMBOL res -824 -576 R0
SYMATTR InstName R2
SYMATTR Value 499K
SYMBOL res -824 -464 R0
SYMATTR InstName R3
SYMATTR Value 56.2K
SYMBOL res -456 -576 R270
SYMATTR InstName R4
SYMATTR Value 50
SYMBOL cap -536 -576 R270
SYMATTR InstName C3
SYMATTR Value 470n
SYMBOL cap -88 -624 R0
SYMATTR InstName C4
SYMATTR Value 4.7
SYMBOL res -936 -432 R0
SYMATTR InstName R5
SYMATTR Value 499K
SYMBOL res -936 -320 R0
SYMATTR InstName R6
SYMATTR Value 27.4K
SYMBOL res -328 560 R0
SYMATTR Value 147K
SYMATTR InstName R7
SYMBOL cap -648 288 R90
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL nmos 248 -352 R0
SYMATTR InstName Q1
SYMATTR Value RJK0651DPB
SYMBOL nmos 248 -160 R0
SYMATTR InstName Q2
SYMATTR Value RJK0651DPB
SYMBOL ind 360 -160 R270
SYMATTR InstName L1
SYMATTR Value 10
SYMATTR SpiceLine Rser=20m Rpar=5K
SYMBOL cap 136 -352 R0
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL schottky 136 -544 R0
SYMATTR InstName D1
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 488 -304 R0
SYMATTR InstName C7
SYMATTR Value .1
SYMBOL schottky 8 -544 R0
SYMATTR InstName D2
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 616 -352 M0
SYMATTR InstName Q3
SYMATTR Value Si4840DY
SYMBOL nmos 616 -160 M0
SYMATTR InstName Q4
SYMATTR Value Si4840DY
SYMBOL res 408 16 R0
SYMATTR InstName R8
SYMATTR Value 4m
SYMBOL res 984 464 R0
SYMATTR InstName R9
SYMATTR Value 73.2K
SYMBOL res 984 576 R0
SYMATTR InstName R10
SYMATTR Value 3.83K
SYMBOL res 888 -352 R270
SYMATTR InstName R11
SYMATTR Value 15m
SYMBOL cap 744 -336 R0
SYMATTR Value2 x2
SYMATTR Value 4.7
SYMATTR InstName C8
SYMATTR SpiceLine V=50 Irms=0 Rser=0.004 Lser=0 mfg="TDK" pn="C575OX7RIH475M" type="X7R"
SYMBOL PowerProducts\\LT3791-1 -312 16 R0
SYMATTR InstName U1
SYMBOL polcap 856 -336 R0
SYMATTR Value 220
SYMATTR InstName C9
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=35 Irms=760m Rser=0.09 Lser=0 mfg="Panasonic" pn="ECA1VFQ221" type="Al electrolytic"
SYMBOL res 1032 -368 R0
SYMATTR InstName Rload
SYMATTR Value 4.8
SYMBOL res -728 -96 R0
SYMATTR InstName R12
SYMATTR Value 200K
SYMBOL res -792 0 R0
SYMATTR InstName R13
SYMATTR Value 100K
SYMBOL res -696 512 R0
SYMATTR InstName R14
SYMATTR Value 100K