* SPICE netlist
XU1 BG INTVCC N001 N002 N005 N004 N003 N008 NC_01 N005 N012 0 N005 N005 SS OUT SPFB VC N010 N013 N006 INTVCC SW PWM_OUT TG LT3763 ;pnba BG)INTVCC)VIN)EN/UVLO)VREF)VINN)VINP)IVINMON)_FAULT)FBIN)FB)GND)CTRL2)CTRL1)SS)SENSE-)SENSE+)VC)ISMON)RT)BOOST)PWM)SW)PWMOUT)TG
R1 N013 0 82.5K
C1 SS 0 .01
C2 VC 0 4700p Rser=59K
R2 N010 N009 50
C3 N009 0 .001
R3 N008 N007 50
C4 N007 0 .001
C5 N005 0 .22
V2 IN 0 24
R4 IN N001 2.5m
R5 IN N003 1K
R6 N001 N004 1K
C6 N003 N004 1
R7 IN N002 84.5K
R8 N002 0 15.4K
C7 N001 0 4.7
C8 INTVCC 0 4.7
D1 INTVCC N006 1N5819
C9 N006 SW .22
MQ1 N001 TG SW SW RJK0305DPB
MQ2 SW BG 0 0 RJK0301DPB
L1 SW SP 1.5 Rser=2m
R9 SP OUT 2.5m
R10 OUT N012 47.5K
R11 N012 0 12.1K
C10 OUT 0 220 x2 V=6.3 Irms=3.2 Rser=0.012 Lser=0 mfg="KEMET" pn="T520V227M006ASE012" type="Tantalum"
D2 OUT N011 PT-121-B
MQ3 N011 PWM_OUT 0 0 IRFH6200
@1 SP SPFB delay=50u fstart=200 fend=362k oct=2 fcoarse=16k nmax=1 3 65k 3 66k 1 pp0=20m pp1=5m f0=24k f1=96k tavgmin=100u tsettle=10u
&1 SP OUT SPFB OUT
&vc VC 0 SPFB OUT
&mod SP OUT VC 0
.options trtol=3
.ic V(OUT)=4.47 V(SS)=3.32 V(VC)=860m V(INTVCC)=5
.fra

* LTspice schematic (.asc)
Version 4
SHEET 1 1408 1280
WIRE -512 -640 -656 -640
WIRE -288 -640 -512 -640
WIRE -256 -640 -288 -640
WIRE -160 -640 -176 -640
WIRE -80 -640 -160 -640
WIRE -32 -640 -80 -640
WIRE 240 -640 -32 -640
WIRE -656 -624 -656 -640
WIRE -512 -624 -512 -640
WIRE -288 -624 -288 -640
WIRE -160 -624 -160 -640
WIRE -32 -624 -32 -640
WIRE -32 -544 -32 -560
WIRE -656 -528 -656 -544
WIRE -512 -528 -512 -544
WIRE -384 -528 -512 -528
WIRE -288 -512 -288 -544
WIRE -272 -512 -288 -512
WIRE -256 -512 -272 -512
WIRE -176 -512 -192 -512
WIRE -160 -512 -160 -544
WIRE -160 -512 -176 -512
WIRE -512 -496 -512 -528
WIRE -272 -464 -272 -512
WIRE -176 -464 -176 -512
WIRE -80 -464 -80 -640
WIRE -512 -400 -512 -416
WIRE -384 -400 -384 -528
WIRE -368 -400 -384 -400
WIRE 48 -400 16 -400
WIRE 112 -400 48 -400
WIRE 160 -400 112 -400
WIRE 48 -384 48 -400
WIRE 160 -384 160 -400
WIRE -384 -304 -480 -304
WIRE -368 -304 -384 -304
WIRE 48 -304 48 -320
WIRE 48 -304 16 -304
WIRE 160 -304 160 -320
WIRE -480 -288 -480 -304
WIRE 240 -288 240 -640
WIRE -480 -208 -480 -224
WIRE -384 -208 -384 -304
WIRE -368 -208 -384 -208
WIRE 80 -208 16 -208
WIRE 192 -208 80 -208
WIRE 48 -192 48 -304
WIRE -384 -112 -384 -208
WIRE -368 -112 -384 -112
WIRE 48 -112 48 -128
WIRE 48 -112 16 -112
WIRE 208 -112 48 -112
WIRE 240 -112 240 -192
WIRE 240 -112 208 -112
WIRE 288 -112 240 -112
WIRE 400 -112 368 -112
WIRE 416 -112 400 -112
WIRE 512 -112 496 -112
WIRE 544 -112 512 -112
WIRE 592 -112 544 -112
WIRE 704 -112 592 -112
WIRE 240 -96 240 -112
WIRE 592 -96 592 -112
WIRE 704 -32 704 -112
WIRE -384 -16 -384 -112
WIRE -368 -16 -384 -16
WIRE 48 -16 16 -16
WIRE 192 -16 48 -16
WIRE 592 -16 592 -32
WIRE 368 32 144 32
WIRE 400 32 400 -112
WIRE 400 32 368 32
WIRE -560 80 -576 80
WIRE -480 80 -496 80
WIRE -368 80 -400 80
WIRE 48 80 16 80
WIRE 80 80 80 32
WIRE 80 80 48 80
WIRE 176 80 80 80
WIRE 400 80 400 32
WIRE 400 80 272 80
WIRE 176 144 160 144
WIRE 288 144 272 144
WIRE 544 160 544 -112
WIRE -560 176 -576 176
WIRE -480 176 -496 176
WIRE -368 176 -400 176
WIRE 160 176 160 144
WIRE 160 176 16 176
WIRE 288 176 288 144
WIRE 288 176 160 176
WIRE 512 176 512 -112
WIRE 512 176 288 176
WIRE 704 192 704 32
WIRE -640 272 -656 272
WIRE -512 272 -576 272
WIRE -384 272 -512 272
WIRE -368 272 -384 272
WIRE 544 272 544 240
WIRE 544 272 16 272
WIRE 656 272 640 272
WIRE 544 288 544 272
WIRE 704 304 704 288
WIRE -464 368 -480 368
WIRE -384 368 -400 368
WIRE -368 368 -384 368
WIRE 96 368 16 368
WIRE 352 368 96 368
WIRE -672 384 -704 384
WIRE -640 384 -672 384
WIRE -512 384 -512 272
WIRE -512 384 -544 384
WIRE 544 384 544 368
WIRE 352 416 352 368
WIRE 640 416 640 272
WIRE 640 416 352 416
WIRE -672 448 -704 448
WIRE -640 448 -672 448
WIRE -432 464 -480 464
WIRE -368 464 -432 464
WIRE -240 544 -240 528
WIRE -112 544 -112 528
WIRE -512 560 -512 384
WIRE -496 560 -512 560
WIRE -368 560 -400 560
WIRE -336 560 -368 560
WIRE -368 624 -400 624
WIRE -336 624 -368 624
WIRE -240 640 -240 624
FLAG -112 544 0
FLAG -240 640 0
FLAG -480 368 0
FLAG -656 272 0
FLAG -576 176 0
FLAG -576 80 0
FLAG -480 -208 0
FLAG -656 -528 0
FLAG -512 -400 0
FLAG -32 -544 0
FLAG 160 -304 0
FLAG 240 0 0
FLAG 544 384 0
FLAG 592 -16 0
FLAG 704 304 0
FLAG -656 -640 IN
FLAG 704 -112 OUT
FLAG -384 368 SS
FLAG -384 272 VC
FLAG 208 -112 SW
FLAG 48 -16 BG
FLAG 80 -208 TG
FLAG 112 -400 INTVCC
FLAG -432 464 INTVCC
FLAG 96 368 PWM_OUT
FLAG 368 32 SP
FLAG 48 80 SPFB
FLAG -672 384 SPFB
FLAG -544 448 0
FLAG -672 448 OUT
FLAG -368 560 SP
FLAG -368 624 OUT
FLAG -496 624 0
SYMBOL PowerProducts\\LT3763 -176 32 R0
SYMATTR InstName U1
SYMBOL res -256 528 R0
SYMATTR InstName R1
SYMATTR Value 82.5K
SYMBOL cap -400 352 R90
SYMATTR InstName C1
SYMATTR Value .01
SYMBOL cap -576 256 R90
SYMATTR InstName C2
SYMATTR Value 4700p
SYMATTR SpiceLine Rser=59K
SYMBOL res -384 160 R90
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL cap -496 160 R90
SYMATTR InstName C3
SYMATTR Value .001
SYMBOL res -384 64 R90
SYMATTR InstName R3
SYMATTR Value 50
SYMBOL cap -496 64 R90
SYMATTR InstName C4
SYMATTR Value .001
SYMBOL cap -496 -288 R0
SYMATTR InstName C5
SYMATTR Value .22
SYMBOL voltage -656 -640 R0
SYMATTR InstName V2
SYMATTR Value 24
SYMBOL res -272 -624 R270
SYMATTR InstName R4
SYMATTR Value 2.5m
SYMBOL res -304 -640 R0
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL res -176 -640 R0
SYMATTR InstName R6
SYMATTR Value 1K
SYMBOL cap -256 -496 R270
SYMATTR InstName C6
SYMATTR Value 1
SYMBOL res -528 -640 R0
SYMATTR InstName R7
SYMATTR Value 84.5K
SYMBOL res -528 -512 R0
SYMATTR InstName R8
SYMATTR Value 15.4K
SYMBOL cap -48 -624 R0
SYMATTR InstName C7
SYMATTR Value 4.7
SYMBOL cap 144 -384 R0
SYMATTR InstName C8
SYMATTR Value 4.7
SYMBOL schottky 32 -384 R0
SYMATTR InstName D1
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 32 -192 R0
SYMATTR InstName C9
SYMATTR Value .22
SYMBOL nmos 192 -288 R0
SYMATTR InstName Q1
SYMATTR Value RJK0305DPB
SYMBOL nmos 192 -96 R0
SYMATTR InstName Q2
SYMATTR Value RJK0301DPB
SYMBOL ind 272 -96 R270
SYMATTR InstName L1
SYMATTR Value 1.5
SYMATTR SpiceLine Rser=2m
SYMBOL res 400 -96 R270
SYMATTR InstName R9
SYMATTR Value 2.5m
SYMBOL res 528 144 R0
SYMATTR InstName R10
SYMATTR Value 47.5K
SYMBOL res 528 272 R0
SYMATTR InstName R11
SYMATTR Value 12.1K
SYMBOL polcap 576 -96 R0
SYMATTR Value 220
SYMATTR Value2 x2
SYMATTR InstName C10
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=6.3 Irms=3.2 Rser=0.012 Lser=0 mfg="KEMET" pn="T520V227M006ASE012" type="Tantalum"
SYMBOL LED 688 -32 R0
SYMATTR InstName D2
SYMATTR Value PT-121-B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 656 192 R0
SYMATTR InstName Q3
SYMATTR Value IRFH6200
SYMBOL fra 80 32 R90
SYMATTR InstName @1
SYMATTR SpiceLine delay=50u fstart=200 fend=362k oct=2 fcoarse=16k nmax=1 3 65k 3 66k 1 pp0=20m pp1=5m f0=24k f1=96k tavgmin=100u tsettle=10u
SYMBOL fraprobe 224 160 R0
SYMATTR InstName &1
SYMBOL fraprobe -592 464 R0
SYMATTR InstName &vc
SYMBOL fraprobe -448 640 R0
SYMATTR InstName &mod