* SPICE netlist
R2 N008 0 30.9K
V1 IN 0 48
C1 N012 N011 1500p
C2 0 N017 4.7
R3 N001 N006 147K
R4 0 N009 6.04K
L1 IN N001 28.5 Rser=39m Rpar=5K
L2 N002 OUT 1 Rser=3.5m Rpar=5K
C3 OUT 0 400
R5 N011 0 12.1K
C4 0 N015 .005
R6 IN N005 412K
R7 N005 0 15.4K
Rload OUT 0 .625
XU1 0 MP_01 MP_02 N013 IN N017 N005 MP_03 MP_04 N015 N016 N012 N006 N009 N008 LT3748 ;pnba GND)))Gate)Vin)INTVcc)EN/UVLO)))SS)Sense)Vc)Rfb)Rref)TC
M1 N001 N013 N016 N016 BSC320N20NS3
R1 N016 0 12m
XU2 N014 0 N007 N004 N010 LT8309 ;pnba Gate)GND)INTVcc)Vcc)Drain
M2 N002 N014 0 0 BSC028N06LS3
R8 N010 N002 2.3K
D1 N002 N003 PMEG6010AED
R9 N004 N003 10
C5 N004 0 1
C6 N007 0 4.7
C7 IN N001 100p Rser=60
K1 L1 L2 1
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1424 608
WIRE -552 -304 -664 -304
WIRE -360 -304 -552 -304
WIRE -200 -304 -360 -304
WIRE 8 -304 -200 -304
WIRE 392 -304 88 -304
WIRE 504 -304 392 -304
WIRE -664 -288 -664 -304
WIRE -200 -288 -200 -304
WIRE 8 -288 8 -304
WIRE 88 -288 88 -304
WIRE 392 -288 392 -304
WIRE 504 -288 504 -304
WIRE -552 -272 -552 -304
WIRE -664 -192 -664 -208
WIRE -200 -192 -200 -224
WIRE 8 -192 8 -208
WIRE 8 -192 -200 -192
WIRE 392 -192 392 -224
WIRE 504 -192 504 -208
WIRE -360 -160 -360 -304
WIRE 88 -144 88 -208
WIRE 168 -144 88 -144
WIRE 248 -144 232 -144
WIRE 360 -144 328 -144
WIRE 408 -144 360 -144
WIRE 360 -128 360 -144
WIRE -664 -96 -712 -96
WIRE -552 -96 -552 -192
WIRE -552 -96 -584 -96
WIRE -520 -96 -552 -96
WIRE -120 -96 -200 -96
WIRE 8 -96 8 -192
WIRE 8 -96 -40 -96
WIRE 408 -80 408 -144
WIRE 424 -80 408 -80
WIRE 712 -80 680 -80
WIRE 712 -64 712 -80
WIRE 360 -48 360 -64
WIRE -616 -16 -712 -16
WIRE -520 -16 -536 -16
WIRE -184 -16 -200 -16
WIRE -88 -16 -104 -16
WIRE 8 -16 8 -96
WIRE 88 16 88 -144
WIRE 216 16 88 16
WIRE 424 16 296 16
WIRE 712 16 712 0
WIRE 88 32 88 16
WIRE -696 64 -712 64
WIRE -600 64 -616 64
WIRE -520 64 -536 64
WIRE -40 64 -200 64
WIRE 424 112 136 112
WIRE 712 112 680 112
WIRE -600 144 -616 144
WIRE -520 144 -536 144
WIRE 8 144 8 80
WIRE 8 144 -200 144
WIRE 8 160 8 144
WIRE 88 160 88 128
WIRE -424 224 -424 208
WIRE -296 224 -296 208
WIRE 8 256 8 240
WIRE -296 304 -296 288
FLAG -616 144 0
FLAG -712 64 0
FLAG -712 -16 0
FLAG -664 -192 0
FLAG -296 304 0
FLAG -88 -16 0
FLAG 392 -192 0
FLAG 88 160 0
FLAG 504 -192 0
FLAG -664 -304 IN
FLAG 504 -304 OUT
FLAG -712 -96 0
FLAG -424 224 0
FLAG 8 256 0
FLAG 360 -48 0
FLAG 712 16 0
FLAG 712 112 0
SYMBOL res -520 -32 R90
SYMATTR InstName R2
SYMATTR Value 30.9K
SYMBOL voltage -664 -304 R0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL cap -536 48 R90
SYMATTR InstName C1
SYMATTR Value 1500p
SYMBOL cap -312 288 M180
SYMATTR InstName C2
SYMATTR Value 4.7
SYMBOL res -24 -112 R90
SYMATTR InstName R3
SYMATTR Value 147K
SYMBOL res -88 -32 R90
SYMATTR InstName R4
SYMATTR Value 6.04K
SYMBOL ind2 -8 -304 R0
SYMATTR InstName L1
SYMATTR Value 28.5
SYMATTR Type ind
SYMATTR SpiceLine Rser=39m Rpar=5K
SYMBOL ind2 104 -192 R180
SYMATTR InstName L2
SYMATTR Value 1
SYMATTR Type ind
SYMATTR SpiceLine Rser=3.5m Rpar=5K
SYMBOL cap 376 -288 R0
SYMATTR InstName C3
SYMATTR Value 400
SYMBOL res -600 48 R90
SYMATTR InstName R5
SYMATTR Value 12.1K
SYMBOL cap -600 128 M90
SYMATTR InstName C4
SYMATTR Value .005
SYMBOL res -568 -288 R0
SYMATTR InstName R6
SYMATTR Value 412K
SYMBOL res -568 -112 R90
SYMATTR InstName R7
SYMATTR Value 15.4K
SYMBOL res 488 -304 R0
SYMATTR InstName Rload
SYMATTR Value .625
SYMBOL PowerProducts\\LT3748 -360 16 R0
SYMATTR InstName U1
SYMBOL nmos -40 -16 R0
SYMATTR Value BSC320N20NS3
SYMATTR InstName M1
SYMBOL res -8 144 R0
SYMATTR InstName R1
SYMATTR Value 12m
SYMBOL PowerProducts\\LT8309 552 16 R0
SYMATTR InstName U2
SYMBOL nmos 136 32 M0
SYMATTR InstName M2
SYMATTR Value BSC028N06LS3
SYMBOL res 312 0 R90
SYMATTR InstName R8
SYMATTR Value 2.3K
SYMBOL schottky 168 -128 R270
SYMATTR InstName D1
SYMATTR Value PMEG6010AED
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 344 -160 R90
SYMATTR InstName R9
SYMATTR Value 10
SYMBOL cap 344 -128 R0
SYMATTR InstName C5
SYMATTR Value 1
SYMBOL cap 696 -64 R0
SYMATTR InstName C6
SYMATTR Value 4.7
SYMBOL cap -216 -288 R0
SYMATTR SpiceLine Rser=60
SYMATTR Value 100p
SYMATTR InstName C7