* SPICE netlist
L1 N002 IN 173 Rser=25m
L2 N004 N001 19.2 Rser=1.7m
L3 N001 OUT 1.4
C1 OUT 0 220 X2 V=10 Irms=5 Rser=0.01 Lser=0 mfg="KEMET" pn="T530D227M010ASE010" type="Tantalum"
C2 OUT 0 1 V=10 Irms=0 Rser=0.009 Lser=0 mfg="TDK" pn="C1608X5RIA105K" type="X5R"
R1 N030 0 26.1K
MQ1 N002 N005 N007 N007 BSC190N15NS3
R2 N028 0 15K
C3 N017 N016 1 IC=0
L4 N018 N016 300 Rser=.76 Rpar=1K
L5 N022 N015 1.2m Rser=.91
C4 N015 N014 .1 IC=0
C5 N014 N022 220p Rser=100
R3 N024 0 10.5K
C6 N021 0 4n
R4 IN N019 365K
C7 N013 0 4.7
MQ2 IN N012 N013 N013 Si3440DV
R5 IN N012 200K
R6 N007 0 15m
C8 N002 N006 100n Rser=168 Cpar=33n
R7 N011 N013 1
MQ3 N004 N008 N010 N010 BSC0901NS
MQ4 N001 N003 0 0 BSC027N04LS
R8 0 N010 3m
R9 N019 0 15K
V1 IN 0 48
MQ5 N006 N009 N011 N011 IRF9640
C9 N027 0 10n
R10 N029 0 22.1K
R11 OUT N020 4.42K
R12 N020 0 604
C10 N023 0 470p Rser=17.8K Cpar=48p
C11 N001 0 1n Rser=10
XU1 0 N005 N013 N009 N011 N025 N007 0 0 N026 N024 N019 N021 N012 N014 N022 LTC3765 ;pnba PGND)PG)Vcc)AG)Ismag)Delay)IS+)IS-)SGND)FS/UV)Rcore)RUN)SSFLT)NDRV)IN+)IN-
XU2 N003 N008 0 0 0 N020 N023 OUT N027 N030 NC_01 OUT OUT 0 OUT 0 N010 0 N028 N029 OUT OUT N001 OUT N018 N017 0 OUT LTC3766 ;pnba SG)FG)Vsec)Mode)Phase)FB)Ith)Run)SS)Ipk)Vsout)Vs+)Vs-)GND)FS/Sync)REGSD)Is-)Is+)SGD)FGD)NDRV)Vin)SW)Vaux)PT-)PT+)PGND)Vcc
R14 N026 0 18.2K
R15 N025 0 14K
Rload OUT 0 1K
.tran 1.2m startup
K1 L1 L2 1
K2 L4 L5 1

* LTspice schematic (.asc)
Version 4
SHEET 1 2400 1072
WIRE -1072 -536 -1200 -536
WIRE -896 -536 -1072 -536
WIRE -176 -536 -896 -536
WIRE 0 -536 -112 -536
WIRE 128 -536 0 -536
WIRE 208 -536 128 -536
WIRE 336 -536 208 -536
WIRE 544 -536 416 -536
WIRE 656 -536 544 -536
WIRE 1104 -536 656 -536
WIRE 1168 -536 1104 -536
WIRE -1200 -520 -1200 -536
WIRE 0 -520 0 -536
WIRE 544 -520 544 -536
WIRE 656 -520 656 -536
WIRE 1168 -520 1168 -536
WIRE -176 -504 -176 -536
WIRE -112 -504 -112 -536
WIRE 208 -456 208 -536
WIRE 0 -440 0 -456
WIRE -1200 -424 -1200 -440
WIRE 544 -424 544 -456
WIRE 656 -424 656 -456
WIRE 1168 -424 1168 -440
WIRE -368 -376 -608 -376
WIRE -176 -376 -176 -424
WIRE -176 -376 -368 -376
WIRE 992 -376 256 -376
WIRE -608 -360 -608 -376
WIRE -368 -344 -368 -376
WIRE 208 -344 208 -360
WIRE -112 -328 -112 -424
WIRE -528 -280 -560 -280
WIRE 128 -280 128 -536
WIRE 912 -280 128 -280
WIRE -896 -264 -896 -536
WIRE -816 -264 -896 -264
WIRE -368 -264 -368 -280
WIRE -816 -248 -816 -264
WIRE -608 -248 -608 -264
WIRE -608 -248 -720 -248
WIRE 832 -248 -64 -248
WIRE -608 -232 -608 -248
WIRE -896 -216 -896 -264
WIRE -416 -184 -432 -184
WIRE -112 -184 -112 -232
WIRE 432 -184 -112 -184
WIRE -112 -168 -112 -184
WIRE -368 -152 -368 -168
WIRE -304 -152 -368 -152
WIRE -816 -136 -816 -168
WIRE -816 -136 -848 -136
WIRE -608 -136 -608 -152
WIRE -368 -136 -368 -152
WIRE 512 -136 272 -136
WIRE 592 -136 512 -136
WIRE 672 -136 592 -136
WIRE 752 -136 672 -136
WIRE 1104 -136 1104 -536
WIRE 1104 -136 752 -136
WIRE 352 -88 352 -104
WIRE 432 -88 432 -184
WIRE 512 -88 512 -136
WIRE 592 -88 592 -136
WIRE 672 -88 672 -136
WIRE 752 -88 752 -136
WIRE 832 -88 832 -248
WIRE 912 -88 912 -280
WIRE 992 -88 992 -376
WIRE -112 -72 -112 -88
WIRE -896 -40 -896 -120
WIRE -368 -40 -368 -56
WIRE -368 -40 -896 -40
WIRE 272 -24 272 -136
WIRE 288 -24 272 -24
WIRE 1104 -24 1104 -136
WIRE 1104 -24 1056 -24
WIRE -816 8 -816 -136
WIRE -720 8 -720 -248
WIRE -624 8 -624 -8
WIRE -528 8 -528 -280
WIRE -432 8 -432 -184
WIRE -208 72 -240 72
WIRE -112 72 -144 72
WIRE 16 72 -64 72
WIRE 288 72 80 72
WIRE 1104 72 1104 -24
WIRE 1104 72 1056 72
WIRE 1200 72 1104 72
WIRE -1072 88 -1072 -536
WIRE -896 88 -896 -40
WIRE -896 88 -912 88
WIRE -880 88 -896 88
WIRE -304 88 -304 -152
WIRE -304 88 -368 88
WIRE -112 152 -112 72
WIRE -64 152 -64 72
WIRE 1200 152 1200 72
WIRE 288 168 112 168
WIRE -1072 184 -1072 168
WIRE -880 184 -1072 184
WIRE -288 184 -368 184
WIRE -240 184 -240 72
WIRE -240 184 -288 184
WIRE -1072 200 -1072 184
WIRE -288 200 -288 184
WIRE 272 264 272 -24
WIRE 288 264 272 264
WIRE 1200 264 1200 232
WIRE 1200 264 1056 264
WIRE -976 280 -992 280
WIRE -880 280 -912 280
WIRE -288 280 -288 264
WIRE -288 280 -368 280
WIRE -112 280 -112 232
WIRE -112 280 -288 280
WIRE -64 280 -64 232
WIRE 112 280 112 168
WIRE 112 280 -64 280
WIRE 1200 280 1200 264
WIRE -1072 296 -1072 280
WIRE 288 360 272 360
WIRE 1088 360 1056 360
WIRE -816 376 -816 360
WIRE -720 376 -720 360
WIRE -624 376 -624 360
WIRE -528 376 -528 360
WIRE -432 376 -432 360
WIRE 1088 376 1088 360
WIRE 1200 376 1200 360
WIRE 352 440 352 424
WIRE 432 440 432 424
WIRE 512 440 512 424
WIRE 592 440 592 424
WIRE 672 440 672 424
WIRE 752 440 752 424
WIRE 832 440 832 424
WIRE 912 440 912 424
WIRE 992 440 992 424
WIRE 1088 456 1088 440
WIRE -720 472 -720 456
WIRE -624 472 -624 456
WIRE -528 472 -528 456
WIRE 512 536 512 504
WIRE 672 536 672 520
WIRE 752 536 752 520
WIRE 912 536 912 520
FLAG -1200 -424 0
FLAG -112 -72 0
FLAG 544 -424 0
FLAG 656 -424 0
FLAG 1168 -424 0
FLAG 912 536 0
FLAG 672 536 0
FLAG -432 376 0
FLAG -816 376 0
FLAG -720 472 0
FLAG -624 472 0
FLAG -528 472 0
FLAG -992 280 0
FLAG -1072 296 0
FLAG -976 88 0
FLAG -608 -136 0
FLAG 208 -344 0
FLAG 832 440 0
FLAG -1200 -536 IN
FLAG 592 440 0
FLAG 352 440 0
FLAG 432 440 0
FLAG 272 360 0
FLAG 512 536 0
FLAG 752 536 0
FLAG 992 440 0
FLAG 352 -104 0
FLAG 1088 456 0
FLAG 1200 376 0
FLAG 1168 -536 OUT
FLAG 0 -440 0
FLAG -624 -8 0
SYMBOL ind2 -192 -408 M180
SYMATTR InstName L1
SYMATTR Value 173
SYMATTR SpiceLine Rser=25m
SYMATTR Type ind
SYMBOL ind2 -96 -408 R180
SYMATTR InstName L2
SYMATTR Value 19.2
SYMATTR SpiceLine Rser=1.7m
SYMATTR Type ind
SYMBOL ind 320 -520 R270
SYMATTR InstName L3
SYMATTR Value 1.4
SYMBOL cap 528 -520 R0
SYMATTR Value2 X2
SYMATTR Value 220
SYMATTR InstName C1
SYMATTR SpiceLine V=10 Irms=5 Rser=0.01 Lser=0 mfg="KEMET" pn="T530D227M010ASE010" type="Tantalum"
SYMBOL cap 640 -520 R0
SYMATTR InstName C2
SYMATTR Value 1
SYMATTR SpiceLine V=10 Irms=0 Rser=0.009 Lser=0 mfg="TDK" pn="C1608X5RIA105K" type="X5R"
SYMBOL res 896 424 R0
SYMATTR Value 26.1K
SYMATTR InstName R1
SYMATTR Type r
SYMBOL nmos -560 -360 M0
SYMATTR InstName Q1
SYMATTR Value BSC190N15NS3
SYMBOL res 656 424 R0
SYMATTR Value 15K
SYMATTR InstName R2
SYMATTR Type r
SYMBOL cap 80 88 M270
SYMATTR InstName C3
SYMATTR Value 1
SYMATTR SpiceLine IC=0
SYMBOL ind2 -48 248 R180
SYMATTR InstName L4
SYMATTR Value 300
SYMATTR SpiceLine Rser=.76 Rpar=1K
SYMATTR Type ind
SYMBOL ind2 -128 248 M180
SYMATTR InstName L5
SYMATTR Value 1.2m
SYMATTR SpiceLine Rser=.91
SYMATTR Type ind
SYMBOL cap -144 88 M270
SYMATTR InstName C4
SYMATTR Value .1
SYMATTR SpiceLine IC=0
SYMBOL cap -304 200 R0
SYMATTR Value 220p
SYMATTR SpiceLine Rser=100
SYMATTR InstName C5
SYMBOL res -736 360 R0
SYMATTR Value 10.5K
SYMATTR InstName R3
SYMATTR Type r
SYMBOL cap -912 296 M270
SYMATTR InstName C6
SYMATTR Value 4n
SYMBOL res -1088 72 R0
SYMATTR Value 365K
SYMATTR InstName R4
SYMATTR Type r
SYMBOL cap -912 104 M270
SYMATTR InstName C7
SYMATTR Value 4.7
SYMBOL nmos -848 -216 M0
SYMATTR Value Si3440DV
SYMATTR InstName Q2
SYMBOL res -832 -264 R0
SYMATTR Value 200K
SYMATTR InstName R5
SYMATTR Type r
SYMBOL res -624 -248 R0
SYMATTR Value 15m
SYMATTR InstName R6
SYMATTR Type r
SYMBOL cap -352 -344 M0
SYMATTR InstName C8
SYMATTR Value 100n
SYMATTR SpiceLine Rser=168
SYMATTR SpiceLine2 Cpar=33n
SYMBOL res -384 -152 R0
SYMATTR Value 1
SYMATTR InstName R7
SYMATTR Type r
SYMBOL nmos -64 -328 M0
SYMATTR InstName Q3
SYMATTR Value BSC0901NS
SYMBOL nmos 256 -456 M0
SYMATTR InstName Q4
SYMATTR Value BSC027N04LS
SYMBOL res -128 -72 M180
SYMATTR InstName R8
SYMATTR Value 3m
SYMATTR Type r
SYMBOL res -1088 184 R0
SYMATTR Value 15K
SYMATTR InstName R9
SYMATTR Type r
SYMBOL voltage -1200 -536 R0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL pmos -416 -264 R0
SYMATTR InstName Q5
SYMATTR Value IRF9640
SYMBOL cap 496 440 R0
SYMATTR InstName C9
SYMATTR Value 10n
SYMBOL res 736 424 R0
SYMATTR Value 22.1K
SYMATTR InstName R10
SYMATTR Type r
SYMBOL res 1184 136 R0
SYMATTR InstName R11
SYMATTR Value 4.42K
SYMBOL res 1184 264 R0
SYMATTR InstName R12
SYMATTR Value 604
SYMBOL cap 1104 376 M0
SYMATTR InstName C10
SYMATTR Value 470p
SYMATTR SpiceLine Rser=17.8K
SYMATTR SpiceLine2 Cpar=48p
SYMBOL cap -16 -520 R0
SYMATTR Value 1n
SYMATTR SpiceLine Rser=10
SYMATTR InstName C11
SYMBOL PowerProducts\\LTC3765 -624 184 R0
SYMATTR InstName U1
SYMBOL PowerProducts\\LTC3766 672 168 R0
SYMATTR InstName U2
SYMBOL res -544 360 R0
SYMATTR InstName R14
SYMATTR Value 18.2K
SYMBOL res -640 360 R0
SYMATTR InstName R15
SYMATTR Value 14K
SYMBOL res 1152 -536 R0
SYMATTR InstName Rload
SYMATTR Value 1K