* SPICE netlist
MQ1 IN N006 N009 N009 Si7852DP
XU1 N001 0 N005 N009 N006 N002 LTC4440 ;pnba VCC)GND)INP)TS)TG)BOOST
C1 N002 N009 .22
D1 N001 N002 GSD2004W-V
MQ2 N009 N014 N016 N016 Si7852DP
MQ3 IN N007 N010 N010 Si7852DP
XU2 N001 0 N008 N010 N007 N003 LTC4440 ;pnba VCC)GND)INP)TS)TG)BOOST
C2 N003 N010 .22
D2 N001 N003 GSD2004W-V
MQ4 N010 N015 N016 N016 Si7852DP
R1 N016 0 10m
C3 N018 0 100p
R2 N018 N016 510
L1 N010 N009 50 Rpar=5K
L2 N011 N013 8 Rpar=1K
MQ5 N013 N019 0 0 IRF6644
L3 N011 OUT 1.5 Rpar=1K
C4 OUT 0 750 Rser=5m
R3 N024 0 20K
C5 N025 N024 125p Rser=250K Cpar=25p
V1 IN 0 48
C6 N022 0 180p
C7 N026 0 .003
R4 0 N020 30K
R5 N017 N021 60K
R6 0 N012 4.99K
R7 IN N004 182K
R8 N004 0 30.1K
R9 N017 N012 80.6K
V2 N001 0 10.26
L4 N013 OUT 1.5 Rpar=1K
XU3 MP_01 N022 N018 N025 N021 N024 N026 MP_02 N012 N017 N012 N004 N020 N017 N023 N019 N008 N001 N015 N014 N005 0 0 N022 LTC3722-2 ;pnba )Ramp)CS)Comp)DPRG)FB)SS))PDLY)SBUS)ADLY)UVLO)SPRG)Vref)OutF)OutE)OutC)Vcc)OutD)OutB)OutA)PGND)GND)Ct
R10 OUT 0 .25
C8 OUT N024 125p Rpar=63K Rser=1K
MQ6 N011 N023 0 0 IRF6644
K1 L1 L2 .99
.tran 750u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2320 992
WIRE -760 -496 -1016 -496
WIRE 72 -496 -760 -496
WIRE -1016 -480 -1016 -496
WIRE -552 -480 -632 -480
WIRE -424 -480 -552 -480
WIRE -120 -480 -424 -480
WIRE 264 -480 -120 -480
WIRE 600 -480 264 -480
WIRE -552 -464 -552 -480
WIRE -120 -464 -120 -480
WIRE 264 -464 264 -480
WIRE -760 -448 -760 -496
WIRE -1016 -384 -1016 -400
WIRE 72 -384 72 -496
WIRE 72 -384 8 -384
WIRE 136 -384 72 -384
WIRE -552 -368 -552 -384
WIRE -424 -352 -424 -480
WIRE -408 -352 -424 -352
WIRE -120 -352 -120 -400
WIRE -120 -352 -152 -352
WIRE 8 -352 8 -384
WIRE 136 -352 136 -384
WIRE 264 -352 264 -400
WIRE 328 -352 264 -352
WIRE 600 -352 600 -480
WIRE 600 -352 584 -352
WIRE -872 -320 -888 -320
WIRE -760 -320 -760 -368
WIRE -760 -320 -792 -320
WIRE -408 -272 -472 -272
WIRE -40 -272 -152 -272
WIRE 328 -272 184 -272
WIRE 632 -272 584 -272
WIRE -408 -192 -424 -192
WIRE -120 -192 -120 -288
WIRE -120 -192 -152 -192
WIRE 8 -192 8 -256
WIRE 8 -192 -120 -192
WIRE 136 -192 136 -256
WIRE 264 -192 264 -288
WIRE 264 -192 136 -192
WIRE 328 -192 264 -192
WIRE 600 -192 584 -192
WIRE 728 -176 648 -176
WIRE 888 -176 776 -176
WIRE 904 -176 888 -176
WIRE 1000 -176 984 -176
WIRE 1048 -176 1000 -176
WIRE 1160 -176 1048 -176
WIRE 728 -160 728 -176
WIRE 776 -160 776 -176
WIRE 1048 -160 1048 -176
WIRE 1160 -160 1160 -176
WIRE -760 -128 -760 -320
WIRE -632 -128 -632 -480
WIRE 8 -128 8 -192
WIRE 648 -128 648 -176
WIRE 648 -128 8 -128
WIRE 136 -112 136 -192
WIRE 648 -112 136 -112
WIRE 8 -96 8 -128
WIRE 136 -96 136 -112
WIRE -1144 -80 -1160 -80
WIRE -1048 -80 -1064 -80
WIRE -920 -80 -1048 -80
WIRE -888 -80 -920 -80
WIRE -472 -80 -472 -272
WIRE -472 -80 -504 -80
WIRE 648 -64 648 -112
WIRE 728 -64 728 -80
WIRE 728 -64 648 -64
WIRE 776 -64 776 -80
WIRE 904 -64 776 -64
WIRE 1000 -64 1000 -176
WIRE 1000 -64 984 -64
WIRE 1048 -64 1048 -96
WIRE 1160 -64 1160 -80
WIRE -1048 -48 -1048 -80
WIRE -920 -16 -920 -80
WIRE -888 -16 -920 -16
WIRE -40 -16 -504 -16
WIRE 280 -16 184 -16
WIRE 776 -16 776 -64
WIRE 8 16 8 0
WIRE 72 16 8 16
WIRE 136 16 136 0
WIRE 136 16 72 16
WIRE 72 32 72 16
WIRE -1048 48 -1048 32
WIRE -888 48 -1048 48
WIRE -360 48 -504 48
WIRE -216 48 -360 48
WIRE 8 48 8 16
WIRE 8 48 -136 48
WIRE -360 64 -360 48
WIRE 728 64 696 64
WIRE 1000 80 1000 -64
WIRE 776 96 776 80
WIRE -1048 112 -1048 48
WIRE -888 112 -1048 112
WIRE -472 112 -504 112
WIRE 72 128 72 112
WIRE -472 160 -472 112
WIRE 280 160 280 -16
WIRE 280 160 -472 160
WIRE -984 176 -1000 176
WIRE -888 176 -904 176
WIRE 632 176 632 -272
WIRE 632 176 -504 176
WIRE 888 224 888 -176
WIRE -1048 240 -1048 112
WIRE -1032 240 -1048 240
WIRE -888 240 -952 240
WIRE 696 240 696 64
WIRE 696 240 -504 240
WIRE -888 304 -904 304
WIRE 840 304 -504 304
WIRE 1000 304 1000 144
WIRE 1000 304 952 304
WIRE 1000 320 1000 304
WIRE 888 336 888 320
WIRE -1016 368 -1032 368
WIRE -904 368 -904 304
WIRE -904 368 -952 368
WIRE -888 368 -904 368
WIRE -392 368 -504 368
WIRE -232 368 -328 368
WIRE 1000 416 1000 400
WIRE -968 432 -1032 432
WIRE -888 432 -904 432
WIRE -232 432 -232 368
WIRE -232 432 -504 432
WIRE 952 432 952 304
WIRE 952 432 -232 432
WIRE -760 496 -760 480
WIRE -632 496 -632 480
FLAG -424 -192 0
FLAG 600 -192 0
FLAG 72 128 0
FLAG -360 128 0
FLAG 1048 -64 0
FLAG 1160 -64 0
FLAG 776 96 0
FLAG 888 336 0
FLAG 1160 -176 OUT
FLAG -760 496 0
FLAG -632 496 0
FLAG 1000 416 0
FLAG -1016 -384 0
FLAG -1032 368 0
FLAG -1032 432 0
FLAG -1160 -80 0
FLAG -888 -320 0
FLAG -552 -368 0
FLAG -1016 -496 IN
FLAG -1000 176 0
SYMBOL nmos -40 -352 R0
SYMATTR Value Si7852DP
SYMATTR InstName Q1
SYMBOL PowerProducts\\LTC4440 -280 -272 R0
SYMATTR InstName U1
SYMBOL cap -136 -352 R0
SYMATTR InstName C1
SYMATTR Value .22
SYMBOL diode -136 -464 R0
SYMATTR InstName D1
SYMATTR Value GSD2004W-V
SYMBOL nmos -40 -96 R0
SYMATTR Value Si7852DP
SYMATTR InstName Q2
SYMBOL nmos 184 -352 M0
SYMATTR Value Si7852DP
SYMATTR InstName Q3
SYMBOL PowerProducts\\LTC4440 456 -272 M0
SYMATTR InstName U2
SYMBOL cap 248 -352 R0
SYMATTR InstName C2
SYMATTR Value .22
SYMBOL diode 248 -464 R0
SYMATTR Value GSD2004W-V
SYMATTR InstName D2
SYMBOL nmos 184 -96 M0
SYMATTR Value Si7852DP
SYMATTR InstName Q4
SYMBOL res 56 16 R0
SYMATTR InstName R1
SYMATTR Value 10m
SYMBOL cap -376 64 R0
SYMATTR Value 100p
SYMATTR InstName C3
SYMBOL res -232 64 R270
SYMATTR InstName R2
SYMATTR Value 510
SYMBOL ind2 712 -64 M180
SYMATTR InstName L1
SYMATTR Value 50
SYMATTR Type ind
SYMATTR SpiceLine Rpar=5K
SYMBOL ind2 792 -176 M0
SYMATTR InstName L2
SYMATTR Value 8
SYMATTR Type ind
SYMATTR SpiceLine Rpar=1K
SYMBOL nmos 728 -16 R0
SYMATTR Value IRF6644
SYMATTR InstName Q5
SYMBOL ind 888 -160 R270
SYMATTR InstName L3
SYMATTR Value 1.5
SYMATTR SpiceLine Rpar=1K
SYMBOL cap 1032 -160 R0
SYMATTR InstName C4
SYMATTR Value 750
SYMATTR SpiceLine Rser=5m
SYMBOL res 984 304 R0
SYMATTR InstName R3
SYMATTR Value 20K
SYMBOL cap -392 384 R270
SYMATTR InstName C5
SYMATTR Value 125p
SYMATTR SpiceLine Rser=250K Cpar=25p
SYMBOL voltage -1016 -496 R0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL cap -952 352 R90
SYMATTR InstName C6
SYMATTR Value 180p
SYMBOL cap -904 416 R90
SYMATTR InstName C7
SYMATTR Value .003
SYMBOL res -1000 192 R270
SYMATTR InstName R4
SYMATTR Value 30K
SYMBOL res -1048 256 R270
SYMATTR InstName R5
SYMATTR Value 60K
SYMBOL res -1160 -64 R270
SYMATTR InstName R6
SYMATTR Value 4.99K
SYMBOL res -776 -464 R0
SYMATTR InstName R7
SYMATTR Value 182K
SYMBOL res -776 -336 R90
SYMATTR InstName R8
SYMATTR Value 30.1K
SYMBOL res -1064 48 M180
SYMATTR InstName R9
SYMATTR Value 80.6K
SYMBOL voltage -552 -480 R0
SYMATTR InstName V2
SYMATTR Value 10.26
SYMBOL ind 888 -48 R270
SYMATTR InstName L4
SYMATTR Value 1.5
SYMATTR SpiceLine Rpar=1K
SYMBOL PowerProducts\\LTC3722-2 -696 176 R0
SYMATTR InstName U3
SYMBOL res 1144 -176 R0
SYMATTR InstName R10
SYMATTR Value .25
SYMBOL cap 984 80 R0
SYMATTR InstName C8
SYMATTR Value 125p
SYMATTR SpiceLine Rpar=63K
SYMATTR SpiceLine2 Rser=1K
SYMBOL nmos 840 224 R0
SYMATTR Value IRF6644
SYMATTR InstName Q6