* SPICE netlist
R1 0 N008 30.9K
V1 N003 0 5
XU2 MP_01 MP_02 N007 N005 N012 0 N011 N003 N003 N004 LTC4449 ;pnba ))TG)TS)BG)GND)IN)Vlogic)Vcc)Boost
D1 N003 N004 CMDSH2-3
M1 IN N007 N005 N005 Si4408DY
M2 N005 N012 0 0 Si4408DY
C1 N005 N004 .1
L1 N005 OUT .25 Rser=.3m
C2 OUT 0 220 x15
R3 OUT 0 10m
R5 N016 0 15K
C4 N016 N015 2.2n Rser=4.02K Cpar=100p
C5 0 N021 100p
XU3 MP_03 MP_04 N006 N001 N009 0 N010 N003 N003 N002 LTC4449 ;pnba ))TG)TS)BG)GND)IN)Vlogic)Vcc)Boost
D2 N003 N002 CMDSH2-3
M3 IN N006 N001 N001 Si4408DY
M4 N001 N009 0 0 Si4408DY
C6 N001 N002 .1
XU4 MP_05 MP_06 N022 N017 N024 0 N025 N003 N003 N018 LTC4449 ;pnba ))TG)TS)BG)GND)IN)Vlogic)Vcc)Boost
D3 N003 N018 CMDSH2-3
M5 IN N022 N017 N017 Si4408DY
M6 N017 N024 0 0 Si4408DY
C8 N017 N018 .1
XU5 MP_07 MP_08 N023 N020 N027 0 N026 N003 N003 N019 LTC4449 ;pnba ))TG)TS)BG)GND)IN)Vlogic)Vcc)Boost
D4 N003 N019 CMDSH2-3
M7 IN N023 N020 N020 Si4408DY
M8 N020 N027 0 0 Si4408DY
C10 N020 N019 .1
R8 N031 0 42.2K
V2 IN 0 12
R9 OUT N016 10K
C3 OUT N016 3.3n Rser=332
C12 N014 OUT .22
L4 N020 OUT .25 Rser=.3m
C13 N029 OUT .22
L2 N001 OUT .25 Rser=.3m
C14 N013 OUT .22
L3 N017 OUT .25 Rser=.3m
R10 N028 N017 3.57K
C7 N028 OUT .22
R6 N029 N020 3.57K
R11 N014 N005 3.57K
R2 N013 N001 3.57K
XU1 N015 NC_09 NC_10 NC_11 MP_12 NC_13 NC_14 NC_15 N015 N003 N003 N003 N015 NC_16 NC_17 NC_18 NC_19 NC_20 NC_21 N015 N003 N030 NC_22 N025 NC_23 N010 NC_24 NC_25 N031 N021 N028 OUT OUT N013 N021 N031 N030 NC_26 IN N030 N031 N021 N029 OUT OUT N014 N021 N031 NC_27 N026 NC_28 N011 NC_29 NC_30 NC_31 N008 N030 N016 0 LTC7851-1 ;pnba Comp1)Vsnsp1)Vsnsn1)Vsnsout1))Vsnsout2)Vsnsn2)Vsnsp2)Comp2)FB2)Vcc)FB3)Comp3)Vsnsp3)Vsnsn3)Vsnsout3)Vsnsout4)Vsnsn4)Vsnsp4)Comp4)FB4)SS4)Run4)PWM4)Pgood4)PWM3)Run3)Pgood3)Ilim4)Iavg4)Isns4p)Isns4n)Isns3n)Isns3p)Iavg3)Ilim3)SS3)Pgood2)Vinsns)SS2)Ilim2)Iavg2)Isns2p)Isns2n)Isns1n)Isns1p)Iavg1)Ilim1)Pgood1)PWM2)Run2)PWM1)Run1)Clkout)CLKIN)Freq)SS1)FB1)SGND
.tran .55m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 3008 2336
WIRE -1248 -1168 -1504 -1168
WIRE -1104 -1168 -1248 -1168
WIRE -640 -1168 -1104 -1168
WIRE 944 -1168 -640 -1168
WIRE 1008 -1168 944 -1168
WIRE -1504 -1152 -1504 -1168
WIRE -992 -1120 -1040 -1120
WIRE -880 -1120 -928 -1120
WIRE -832 -1120 -880 -1120
WIRE -720 -1120 -768 -1120
WIRE -112 -1120 -720 -1120
WIRE 32 -1120 -112 -1120
WIRE 560 -1120 32 -1120
WIRE 608 -1120 560 -1120
WIRE 720 -1120 672 -1120
WIRE 768 -1120 720 -1120
WIRE 880 -1120 832 -1120
WIRE 32 -1104 32 -1120
WIRE -1248 -1072 -1248 -1168
WIRE 1008 -1072 1008 -1168
WIRE -1504 -1056 -1504 -1072
WIRE -880 -1056 -880 -1120
WIRE 720 -1056 720 -1120
WIRE -112 -1008 -112 -1120
WIRE -1008 -992 -1200 -992
WIRE -720 -992 -720 -1120
WIRE -720 -992 -752 -992
WIRE 560 -992 560 -1120
WIRE 592 -992 560 -992
WIRE 960 -992 848 -992
WIRE -640 -928 -640 -1168
WIRE -592 -928 -640 -928
WIRE 384 -928 368 -928
WIRE 480 -928 464 -928
WIRE -1472 -912 -1504 -912
WIRE -1360 -912 -1392 -912
WIRE -1248 -912 -1248 -976
WIRE -1248 -912 -1360 -912
WIRE -1040 -912 -1040 -1120
WIRE -1040 -912 -1248 -912
WIRE -1008 -912 -1040 -912
WIRE -720 -912 -720 -992
WIRE -720 -912 -752 -912
WIRE 560 -912 560 -992
WIRE 592 -912 560 -912
WIRE 880 -912 880 -1120
WIRE 880 -912 848 -912
WIRE 1008 -912 1008 -976
WIRE 1008 -912 880 -912
WIRE 1152 -912 1008 -912
WIRE 1200 -912 1152 -912
WIRE 1344 -912 1280 -912
WIRE 1440 -912 1344 -912
WIRE 1504 -912 1440 -912
WIRE 1504 -896 1504 -912
WIRE -1248 -880 -1248 -912
WIRE 1008 -880 1008 -912
WIRE 1344 -880 1344 -912
WIRE -1360 -864 -1360 -912
WIRE 1152 -864 1152 -912
WIRE -1008 -832 -1040 -832
WIRE -592 -832 -752 -832
WIRE 592 -832 368 -832
WIRE 880 -832 848 -832
WIRE 1280 -816 1344 -912
WIRE -1040 -800 -1040 -832
WIRE -1040 -800 -1200 -800
WIRE 880 -800 880 -832
WIRE 960 -800 880 -800
WIRE 1344 -800 1344 -816
WIRE 1504 -800 1504 -816
WIRE -1248 -768 -1248 -784
WIRE 1008 -768 1008 -784
WIRE -880 -752 -880 -768
WIRE 720 -752 720 -768
WIRE -656 -736 -816 -736
WIRE -592 -736 -656 -736
WIRE 400 -736 368 -736
WIRE 640 -736 400 -736
WIRE -1360 -720 -1360 -784
WIRE -816 -720 -816 -736
WIRE -816 -720 -1360 -720
WIRE -656 -720 -656 -736
WIRE 400 -720 400 -736
WIRE 640 -720 640 -736
WIRE 1152 -720 1152 -784
WIRE 1152 -720 640 -720
WIRE -1504 -640 -1504 -912
WIRE -656 -640 -656 -656
WIRE -656 -640 -1504 -640
WIRE -592 -640 -656 -640
WIRE 400 -640 400 -656
WIRE 400 -640 368 -640
WIRE 1104 -640 400 -640
WIRE 1280 -640 1280 -816
WIRE 1280 -640 1104 -640
WIRE 1280 -608 1280 -640
WIRE 1104 -576 1104 -640
WIRE -592 -544 -688 -544
WIRE 400 -544 368 -544
WIRE 416 -544 400 -544
WIRE 528 -544 480 -544
WIRE -688 -512 -688 -544
WIRE 400 -512 400 -544
WIRE 400 -512 -688 -512
WIRE -720 -448 -720 -912
WIRE -592 -448 -720 -448
WIRE 528 -448 528 -544
WIRE 528 -448 368 -448
WIRE 1104 -448 1104 -512
WIRE 1104 -448 528 -448
WIRE 1280 -448 1280 -528
WIRE 1280 -448 1104 -448
WIRE 1280 -432 1280 -448
WIRE 1280 -336 1280 -352
WIRE -1104 -272 -1104 -1168
WIRE -1104 -272 -1248 -272
WIRE 944 -272 944 -1168
WIRE 1008 -272 944 -272
WIRE -992 -160 -1040 -160
WIRE -880 -160 -928 -160
WIRE -832 -160 -880 -160
WIRE -720 -160 -720 -448
WIRE -720 -160 -768 -160
WIRE 560 -160 560 -912
WIRE 608 -160 560 -160
WIRE 720 -160 672 -160
WIRE 768 -160 720 -160
WIRE 880 -160 832 -160
WIRE -1248 -112 -1248 -272
WIRE 1008 -112 1008 -272
WIRE -880 -96 -880 -160
WIRE 720 -96 720 -160
WIRE -592 -64 -624 -64
WIRE 400 -64 368 -64
WIRE 432 -64 400 -64
WIRE 432 -48 432 -64
WIRE -1008 -32 -1200 -32
WIRE -720 -32 -720 -160
WIRE -720 -32 -752 -32
WIRE 560 -32 560 -160
WIRE 592 -32 560 -32
WIRE 960 -32 848 -32
WIRE -624 32 -624 -64
WIRE -592 32 -624 32
WIRE 400 32 400 -64
WIRE 400 32 368 32
WIRE -1504 48 -1504 -640
WIRE -1488 48 -1504 48
WIRE -1360 48 -1408 48
WIRE -1248 48 -1248 -16
WIRE -1248 48 -1360 48
WIRE -1040 48 -1040 -160
WIRE -1040 48 -1248 48
WIRE -1008 48 -1040 48
WIRE -720 48 -720 -32
WIRE -720 48 -752 48
WIRE 432 48 432 16
WIRE 560 48 560 -32
WIRE 592 48 560 48
WIRE 880 48 880 -160
WIRE 880 48 848 48
WIRE 1008 48 1008 -16
WIRE 1008 48 880 48
WIRE 1168 48 1008 48
WIRE 1200 48 1168 48
WIRE 1440 48 1440 -912
WIRE 1440 48 1280 48
WIRE -624 64 -624 32
WIRE 400 64 400 32
WIRE 400 64 -624 64
WIRE -1248 80 -1248 48
WIRE 1008 80 1008 48
WIRE 1168 96 1168 48
WIRE -1360 112 -1360 48
WIRE -1008 128 -1040 128
WIRE -592 128 -752 128
WIRE 592 128 368 128
WIRE 880 128 848 128
WIRE -1040 160 -1040 128
WIRE -1040 160 -1200 160
WIRE 880 160 880 128
WIRE 960 160 880 160
WIRE -1248 192 -1248 176
WIRE 1008 192 1008 176
WIRE -880 208 -880 192
WIRE 720 208 720 192
WIRE -656 224 -784 224
WIRE -592 224 -656 224
WIRE 400 224 368 224
WIRE 624 224 400 224
WIRE -1360 240 -1360 192
WIRE -784 240 -784 224
WIRE -784 240 -1360 240
WIRE -656 240 -656 224
WIRE 400 240 400 224
WIRE 624 240 624 224
WIRE 1168 240 1168 176
WIRE 1168 240 624 240
WIRE -1504 320 -1504 48
WIRE -656 320 -656 304
WIRE -656 320 -1504 320
WIRE -592 320 -656 320
WIRE 400 320 400 304
WIRE 400 320 368 320
WIRE 1440 320 1440 48
WIRE 1440 320 400 320
WIRE -688 416 -688 -512
WIRE -592 416 -688 416
WIRE 400 416 368 416
WIRE -688 448 -688 416
WIRE 400 448 400 416
WIRE 400 448 -688 448
WIRE -720 512 -720 48
WIRE -592 512 -720 512
WIRE 560 512 560 48
WIRE 560 512 368 512
WIRE -112 976 -112 960
WIRE -496 1008 -496 960
WIRE -400 1008 -400 960
WIRE -400 1008 -496 1008
WIRE 176 1008 176 960
WIRE 176 1008 -400 1008
WIRE 272 1008 272 960
WIRE 272 1008 176 1008
WIRE -304 1024 -304 960
WIRE -208 1024 -208 960
WIRE -208 1024 -304 1024
WIRE -16 1024 -16 960
WIRE -16 1024 -208 1024
WIRE 80 1024 80 960
WIRE 80 1024 -16 1024
WIRE 80 1040 80 1024
WIRE 80 1136 80 1120
WIRE -1504 1168 -1504 320
WIRE 1440 1168 1440 320
WIRE 1440 1168 -1504 1168
FLAG 480 -928 0
FLAG 32 -1024 0
FLAG 720 -752 0
FLAG 1008 -768 0
FLAG 1344 -800 0
FLAG 1504 -800 0
FLAG 1280 -336 0
FLAG 432 48 0
FLAG -880 -752 0
FLAG -1248 -768 0
FLAG -880 208 0
FLAG -1248 192 0
FLAG 720 208 0
FLAG 1008 192 0
FLAG 80 1136 0
FLAG -112 976 0
FLAG -1504 -1056 0
FLAG -1504 -1168 IN
FLAG 1504 -912 OUT
SYMBOL res 480 -944 R90
SYMATTR InstName R1
SYMATTR Value 30.9K
SYMBOL voltage 32 -1120 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL PowerProducts\\LTC4449 720 -912 R0
SYMATTR InstName U2
SYMBOL schottky 608 -1104 R270
SYMATTR Value CMDSH2-3
SYMATTR InstName D1
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 960 -1072 R0
SYMATTR InstName M1
SYMATTR Value Si4408DY
SYMBOL nmos 960 -880 R0
SYMATTR InstName M2
SYMATTR Value Si4408DY
SYMBOL cap 832 -1136 R90
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL ind 1184 -896 R270
SYMATTR InstName L1
SYMATTR Value .25
SYMATTR Value2 Rser=.3m
SYMBOL cap 1328 -880 R0
SYMATTR Value2 x15
SYMATTR Value 220
SYMATTR InstName C2
SYMBOL res 1488 -912 R0
SYMATTR InstName R3
SYMATTR Value 10m
SYMBOL res 1264 -448 R0
SYMATTR InstName R5
SYMATTR Value 15K
SYMBOL cap 480 -560 R90
SYMATTR InstName C4
SYMATTR Value 2.2n
SYMATTR Value2 Rser=4.02K
SYMATTR SpiceLine Cpar=100p
SYMBOL cap 416 16 M180
SYMATTR InstName C5
SYMATTR Value 100p
SYMBOL PowerProducts\\LTC4449 -880 -912 M0
SYMATTR InstName U3
SYMBOL schottky -768 -1104 M270
SYMATTR Value CMDSH2-3
SYMATTR InstName D2
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -1200 -1072 M0
SYMATTR InstName M3
SYMATTR Value Si4408DY
SYMBOL nmos -1200 -880 M0
SYMATTR InstName M4
SYMATTR Value Si4408DY
SYMBOL cap -992 -1136 M90
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL PowerProducts\\LTC4449 -880 48 M0
SYMATTR InstName U4
SYMBOL schottky -768 -144 M270
SYMATTR Value CMDSH2-3
SYMATTR InstName D3
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -1200 -112 M0
SYMATTR InstName M5
SYMATTR Value Si4408DY
SYMBOL nmos -1200 80 M0
SYMATTR InstName M6
SYMATTR Value Si4408DY
SYMBOL cap -992 -176 M90
SYMATTR InstName C8
SYMATTR Value .1
SYMBOL PowerProducts\\LTC4449 720 48 R0
SYMATTR InstName U5
SYMBOL schottky 608 -144 R270
SYMATTR Value CMDSH2-3
SYMATTR InstName D4
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 960 -112 R0
SYMATTR InstName M7
SYMATTR Value Si4408DY
SYMBOL nmos 960 80 R0
SYMATTR InstName M8
SYMATTR Value Si4408DY
SYMBOL cap 832 -176 R90
SYMATTR InstName C10
SYMATTR Value .1
SYMBOL res 64 1024 R0
SYMATTR InstName R8
SYMATTR Value 42.2K
SYMBOL voltage -1504 -1168 R0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL res 1264 -624 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL cap 1088 -576 R0
SYMATTR Value2 Rser=332
SYMATTR Value 3.3n
SYMATTR InstName C3
SYMBOL cap 384 -720 R0
SYMATTR InstName C12
SYMATTR Value .22
SYMBOL ind 1184 64 R270
SYMATTR InstName L4
SYMATTR Value .25
SYMATTR Value2 Rser=.3m
SYMBOL cap 384 240 R0
SYMATTR InstName C13
SYMATTR Value .22
SYMBOL ind -1376 -896 M270
SYMATTR InstName L2
SYMATTR Value .25
SYMATTR Value2 Rser=.3m
SYMBOL cap -672 -720 R0
SYMATTR InstName C14
SYMATTR Value .22
SYMBOL ind -1392 64 M270
SYMATTR InstName L3
SYMATTR Value .25
SYMATTR Value2 Rser=.3m
SYMBOL res -1376 208 M180
SYMATTR InstName R10
SYMATTR Value 3.57K
SYMBOL cap -672 240 R0
SYMATTR InstName C7
SYMATTR Value .22
SYMBOL res 1152 192 M180
SYMATTR InstName R6
SYMATTR Value 3.57K
SYMBOL res 1136 -768 M180
SYMATTR InstName R11
SYMATTR Value 3.57K
SYMBOL res -1376 -768 M180
SYMATTR InstName R2
SYMATTR Value 3.57K
SYMBOL PowerProducts\\LTC7851-1 -112 -16 R0
SYMATTR InstName U1