* SPICE netlist
MQ1 N006 N008 N009 N009 Si4848DY
R1 N010 0 63.4K
R2 N013 0 15.8K
R3 OUT N013 105K
L1 IN N006 28.8 Rpar=3K
D1 N003 OUT MBRS360
R4 N012 N011 10K
C2 N011 0 .01
V1 IN 0 54
C3 N001 0 4.7
C4 N007 0 .01
R5 N004 0 44.2K
R6 IN N004 1Meg
R7 N009 0 .03
C5 N012 0 100p
R8 IN N005 6.2K
C6 IN N005 .022
D2 N006 N005 ES1D
L2 0 N003 3.2 Rpar=1K
D3 N002 N001 1N4148
R9 OUT N002 5.1
Rload OUT 0 10
C1 OUT 0 47
XU1 N012 N013 N007 N010 MP_01 N009 N008 N001 N004 IN 0 LT3758A ;pnba Vc)FBX)SS)Rt))Sense)Gate)INTVcc)_SHDN/UVLO)Vin)GND
.tran 2m startup
K1 L1 L2 .99

* LTspice schematic (.asc)
Version 4
SHEET 1 1440 576
WIRE 48 -272 -32 -272
WIRE 160 -272 112 -272
WIRE 560 -272 240 -272
WIRE -624 -224 -720 -224
WIRE -224 -224 -624 -224
WIRE 32 -224 -224 -224
WIRE 128 -224 32 -224
WIRE 320 -224 128 -224
WIRE 464 -224 368 -224
WIRE 560 -224 560 -272
WIRE 560 -224 528 -224
WIRE 624 -224 560 -224
WIRE 720 -224 624 -224
WIRE -720 -208 -720 -224
WIRE -624 -208 -624 -224
WIRE 32 -208 32 -224
WIRE 128 -208 128 -224
WIRE 320 -208 320 -224
WIRE 368 -208 368 -224
WIRE 624 -208 624 -224
WIRE 720 -208 720 -224
WIRE -224 -176 -224 -224
WIRE -720 -112 -720 -128
WIRE -624 -112 -624 -128
WIRE -384 -112 -624 -112
WIRE -32 -112 -32 -272
WIRE -32 -112 -64 -112
WIRE 32 -112 32 -144
WIRE 128 -112 128 -128
WIRE 128 -112 32 -112
WIRE 192 -112 128 -112
WIRE 320 -112 320 -128
WIRE 320 -112 256 -112
WIRE 368 -112 368 -128
WIRE 624 -112 624 -144
WIRE 720 -112 720 -128
WIRE -624 -96 -624 -112
WIRE 320 -96 320 -112
WIRE -480 -16 -496 -16
WIRE -384 -16 -416 -16
WIRE 272 -16 -64 -16
WIRE -624 0 -624 -16
WIRE 320 16 320 0
WIRE 320 16 256 16
WIRE 320 32 320 16
WIRE 560 48 560 -224
WIRE -480 80 -496 80
WIRE -384 80 -400 80
WIRE 256 80 256 16
WIRE 256 80 -64 80
WIRE 320 128 320 112
WIRE -544 176 -592 176
WIRE -448 176 -464 176
WIRE -384 176 -448 176
WIRE 560 176 560 128
WIRE 560 176 -64 176
WIRE -592 192 -592 176
WIRE -448 192 -448 176
WIRE 560 192 560 176
WIRE -224 256 -224 240
WIRE -592 272 -592 256
WIRE -448 272 -448 256
WIRE 560 288 560 272
FLAG -496 80 0
FLAG 560 288 0
FLAG -224 256 0
FLAG 624 -112 0
FLAG -592 272 0
FLAG 720 -112 0
FLAG -720 -112 0
FLAG -496 -16 0
FLAG -32 -48 0
FLAG 720 -224 OUT
FLAG -720 -224 IN
FLAG -624 0 0
FLAG 320 128 0
FLAG -448 272 0
FLAG 368 -112 0
SYMBOL NMOS 272 -96 R0
SYMATTR InstName Q1
SYMATTR Value Si4848DY
SYMBOL RES -384 64 R90
SYMATTR InstName R1
SYMATTR Value 63.4K
SYMBOL res 544 176 R0
SYMATTR InstName R2
SYMATTR Value 15.8K
SYMBOL res 544 32 R0
SYMATTR InstName R3
SYMATTR Value 105K
SYMBOL ind2 304 -224 R0
SYMATTR InstName L1
SYMATTR Value 28.8
SYMATTR Type ind
SYMATTR SpiceLine Rpar=3K
SYMBOL schottky 464 -208 R270
SYMATTR InstName D1
SYMATTR Value MBRS360
SYMBOL res -448 160 R90
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL cap -608 192 R0
SYMATTR InstName C2
SYMATTR Value .01
SYMBOL VOLTAGE -720 -224 R0
SYMATTR InstName V1
SYMATTR Value 54
SYMBOL polcap -48 -112 R0
SYMATTR InstName C3
SYMATTR Value 4.7
SYMBOL cap -416 -32 R90
SYMATTR InstName C4
SYMATTR Value .01
SYMBOL res -640 -112 R0
SYMATTR InstName R5
SYMATTR Value 44.2K
SYMBOL res -640 -224 R0
SYMATTR InstName R6
SYMATTR Value 1Meg
SYMBOL res 304 16 R0
SYMATTR InstName R7
SYMATTR Value .03
SYMBOL cap -464 192 R0
SYMATTR InstName C5
SYMATTR Value 100p
SYMBOL res 112 -224 R0
SYMATTR InstName R8
SYMATTR Value 6.2K
SYMBOL cap 16 -208 R0
SYMATTR InstName C6
SYMATTR Value .022
SYMBOL diode 256 -128 R90
SYMATTR InstName D2
SYMATTR Value ES1D
SYMBOL ind2 384 -112 R180
SYMATTR InstName L2
SYMATTR Value 3.2
SYMATTR Type ind
SYMATTR SpiceLine Rpar=1K
SYMBOL diode 112 -288 R90
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL res 256 -288 R90
SYMATTR InstName R9
SYMATTR Value 5.1
SYMBOL res 704 -224 R0
SYMATTR InstName Rload
SYMATTR Value 10
SYMBOL cap 608 -208 R0
SYMATTR InstName C1
SYMATTR Value 47
SYMBOL PowerProducts\\LT3758A -224 32 R0
SYMATTR InstName U1