* SPICE netlist
L2 N005 N001 20 Rser=80m
L1 N004 IN 80 Rser=80m
MQ1 N004 N006 N009 N009 Si4490DY
R1 N009 0 8m
C5 OUT 0 220 Rser=10m
C8 OUT 0 1 Rser=1m
V1 IN 0 48
R2 N009 N010 1.21K
Rload OUT 0 12
C2 0 N020 22n
R10 N018 N017 30.1K
C3 N017 0 200p
C6 N018 0 10n
R8 OUT N014 8.87K
R9 N014 0 976
R6 OUT N015 8.87K
R7 N015 0 976
R3 N006 0 10K
L3 N001 OUT 4.7 Rser=5m
MQ2 N005 N011 0 0 Si4470DY
C4 0 N013 2.2
R4 N021 N019 1
C7 N016 0 10n
MQ3 N001 N002 0 0 Si4470DY
R5 N019 0 121K
C9 N003 N004 22n
MQ4 N003 N007 0 0 IRFP9240
C1 N007 N008 100n
D1 N007 0 BAT46WJ
C10 N012 0 1
XU1 N006 0 N008 0 N012 IN IN N010 N021 0 N016 N019 0 NC_01 0 N017 N014 N015 OUT N013 N020 0 N002 N011 ADP1074 ;pnba Ngate)Pgnd1)Pgate)Agnd1)Vreg1)Vin)EN)CS)Rt)Sync)SS1)Dmax)Mode)_Pgood)Pgnd2)Comp)FB)OVP)VDD2)Vreg2)SS2)Agnd2)SR2)SR1
K1 L1 L2 0.9999
.tran 2.2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1696 1328
WIRE -768 -664 -848 -664
WIRE 80 -664 -768 -664
WIRE 432 -664 128 -664
WIRE 480 -664 432 -664
WIRE 608 -664 560 -664
WIRE 656 -664 608 -664
WIRE 768 -664 656 -664
WIRE 848 -664 768 -664
WIRE -848 -648 -848 -664
WIRE 80 -648 80 -664
WIRE 128 -648 128 -664
WIRE 432 -648 432 -664
WIRE 848 -648 848 -664
WIRE 656 -632 656 -664
WIRE 768 -632 768 -664
WIRE 384 -568 352 -568
WIRE -848 -552 -848 -568
WIRE -272 -536 -592 -536
WIRE 16 -536 -208 -536
WIRE 80 -536 80 -568
WIRE 80 -536 16 -536
WIRE 128 -536 128 -568
WIRE 224 -536 128 -536
WIRE 432 -536 432 -552
WIRE 432 -536 320 -536
WIRE 656 -536 656 -568
WIRE 656 -536 432 -536
WIRE 768 -536 768 -568
WIRE 768 -536 656 -536
WIRE 848 -536 848 -568
WIRE 848 -536 768 -536
WIRE 16 -520 16 -536
WIRE 848 -520 848 -536
WIRE -592 -488 -592 -536
WIRE -32 -440 -144 -440
WIRE -448 -408 -544 -408
WIRE -384 -408 -448 -408
WIRE -288 -408 -320 -408
WIRE 16 -408 16 -424
WIRE 16 -408 -96 -408
WIRE 16 -392 16 -408
WIRE -592 -376 -592 -392
WIRE -448 -376 -448 -408
WIRE -96 -360 -96 -408
WIRE -448 -296 -448 -312
WIRE 16 -296 16 -312
WIRE -96 -216 -96 -280
WIRE -80 -216 -96 -216
WIRE 304 -216 304 -488
WIRE 304 -216 272 -216
WIRE -240 -136 -256 -136
WIRE -144 -136 -144 -440
WIRE -144 -136 -160 -136
WIRE -80 -136 -144 -136
WIRE 352 -136 352 -568
WIRE 352 -136 272 -136
WIRE -288 -56 -288 -408
WIRE -80 -56 -288 -56
WIRE 448 -56 272 -56
WIRE 608 -56 608 -664
WIRE 608 -56 448 -56
WIRE -160 24 -176 24
WIRE -80 24 -96 24
WIRE 288 24 272 24
WIRE 368 24 352 24
WIRE 448 24 448 -56
WIRE 608 72 608 -56
WIRE -768 104 -768 -664
WIRE -96 104 -768 104
WIRE -80 104 -96 104
WIRE 448 120 448 104
WIRE 448 120 368 120
WIRE 448 136 448 120
WIRE 608 168 608 152
WIRE 608 168 560 168
WIRE -96 184 -96 104
WIRE -80 184 -96 184
WIRE 368 184 368 120
WIRE 368 184 272 184
WIRE 608 184 608 168
WIRE 448 232 448 216
WIRE -80 264 -96 264
WIRE 560 264 560 168
WIRE 560 264 272 264
WIRE 608 280 608 264
WIRE -176 344 -192 344
WIRE -80 344 -112 344
WIRE 432 344 272 344
WIRE 480 344 432 344
WIRE 608 344 560 344
WIRE 432 360 432 344
WIRE 608 360 608 344
WIRE -80 424 -192 424
WIRE 288 424 272 424
WIRE 368 424 352 424
WIRE 432 440 432 424
WIRE 608 440 608 424
WIRE -288 504 -304 504
WIRE -192 504 -192 424
WIRE -192 504 -208 504
WIRE -176 504 -192 504
WIRE -80 504 -96 504
WIRE 288 504 272 504
WIRE -80 584 -96 584
WIRE 288 584 272 584
WIRE 32 664 32 648
WIRE 160 664 160 648
FLAG 16 -296 0
FLAG 848 -520 0
FLAG 848 -664 OUT
FLAG 160 664 0
FLAG -848 -552 0
FLAG -96 264 0
FLAG 368 424 0
FLAG 432 440 0
FLAG 608 440 0
FLAG 448 232 0
FLAG 608 280 0
FLAG 32 664 0
FLAG -256 -136 0
FLAG -848 -664 IN
FLAG 368 24 0
FLAG -304 504 0
FLAG -192 344 0
FLAG -592 -376 0
FLAG -448 -296 0
FLAG -176 24 0
FLAG -96 584 0
FLAG 288 584 0
FLAG 288 504 0
SYMBOL ind2 144 -552 R180
SYMATTR InstName L2
SYMATTR Value 20
SYMATTR Type ind
SYMATTR SpiceLine Rser=80m
SYMBOL ind2 64 -552 M180
SYMATTR InstName L1
SYMATTR Value 80
SYMATTR Type ind
SYMATTR SpiceLine Rser=80m
SYMBOL nmos -32 -520 R0
SYMATTR InstName Q1
SYMATTR Value Si4490DY
SYMBOL res 0 -408 R0
SYMATTR InstName R1
SYMATTR Value 8m
SYMBOL cap 640 -632 R0
SYMATTR Value 220
SYMATTR InstName C5
SYMATTR SpiceLine Rser=10m
SYMBOL cap 752 -632 R0
SYMATTR InstName C8
SYMATTR Value 1
SYMATTR SpiceLine Rser=1m
SYMBOL voltage -848 -664 R0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL res -112 -376 R0
SYMATTR InstName R2
SYMATTR Value 1.21K
SYMBOL res 832 -664 R0
SYMATTR InstName Rload
SYMATTR Value 12
SYMBOL cap 352 408 R90
SYMATTR InstName C2
SYMATTR Value 22n
SYMBOL res 576 328 R90
SYMATTR InstName R10
SYMATTR Value 30.1K
SYMBOL cap 416 360 R0
SYMATTR InstName C3
SYMATTR Value 200p
SYMBOL cap 592 360 R0
SYMATTR InstName C6
SYMATTR Value 10n
SYMBOL res 432 8 R0
SYMATTR InstName R8
SYMATTR Value 8.87K
SYMBOL res 432 120 R0
SYMATTR InstName R9
SYMATTR Value 976
SYMBOL res 592 56 R0
SYMATTR InstName R6
SYMATTR Value 8.87K
SYMBOL res 592 168 R0
SYMATTR InstName R7
SYMATTR Value 976
SYMBOL res -144 -152 R90
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL ind 464 -648 R270
SYMATTR InstName L3
SYMATTR Value 4.7
SYMATTR SpiceLine Rser=5m
SYMBOL nmos 224 -488 R270
SYMATTR InstName Q2
SYMATTR Value Si4470DY
SYMBOL cap 352 8 R90
SYMATTR InstName C4
SYMATTR Value 2.2
SYMBOL res -80 488 R90
SYMATTR InstName R4
SYMATTR Value 1
SYMBOL cap -112 328 R90
SYMATTR InstName C7
SYMATTR Value 10n
SYMBOL nmos 384 -648 R0
SYMATTR InstName Q3
SYMATTR Value Si4470DY
SYMBOL res -192 488 R90
SYMATTR InstName R5
SYMATTR Value 121K
SYMBOL cap -272 -552 M90
SYMATTR InstName C9
SYMATTR Value 22n
SYMBOL pmos -544 -488 M0
SYMATTR InstName Q4
SYMATTR Value IRFP9240
SYMBOL cap -384 -424 M90
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL schottky -464 -376 R0
SYMATTR InstName D1
SYMATTR Value BAT46WJ
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap -96 8 R90
SYMATTR InstName C10
SYMATTR Value 1
SYMBOL ADP1074 96 152 R0
SYMATTR InstName U1