* SPICE netlist
V1 IN 0 3.6
MQ1 IN N004 N001 N001 FDS6890A
MQ2 N001 N008 0 0 FDS6890A
D1 IN N006 CMDSH2-3
C1 N006 N001 .22
L1 N001 N002 2.2 Rpar=1K
MQ3 OUT N005 N002 N002 FDS6890A
D2 N003 N007 CMDSH2-3
C2 N007 N002 .22
MQ4 N002 N009 0 0 FDS6890A
D3 0 N001 PMEG2020AEA
D4 0 N002 PMEG2020AEA
C3 OUT 0 220 Rser=2m
R1 OUT N010 215K
R2 N010 0 127K
C4 OUT N010 220p Rser=10K
C5 N010 N013 470p Rser=31.6K Cpar=10p
R3 OUT N011 215K
R4 N011 0 127K
R5 N015 0 42.2K
R6 N014 0 49.9K
C6 N012 0 500p
Rload OUT 0 5
XU1 N012 N013 N010 N011 N015 0 N014 0 NC_01 OUT N007 N005 N002 N002 N009 N003 N008 N001 N001 N004 N006 IN N003 IN 0 LTC3785-1 ;pnba RUN/SS)Vc)FB)Vsense)Ilset)CCM)Rt)Mode)Pgood)Isvout)Vbst2)TG2)SW2)Issw2)BG2)Vdrv)BG1)Issw1)SW1)TG1)Vbst1)Isvin)Vcc)Vin)GND
.tran 900u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1664 1168
WIRE -128 -584 -688 -584
WIRE 368 -584 -48 -584
WIRE -624 -536 -832 -536
WIRE -480 -536 -624 -536
WIRE -208 -536 -480 -536
WIRE 32 -536 -112 -536
WIRE 80 -536 32 -536
WIRE -832 -520 -832 -536
WIRE -208 -520 -208 -536
WIRE -112 -520 -112 -536
WIRE -480 -504 -480 -536
WIRE 80 -504 80 -536
WIRE 32 -456 32 -536
WIRE 32 -456 16 -456
WIRE -832 -424 -832 -440
WIRE -624 -360 -624 -536
WIRE -336 -360 -624 -360
WIRE 224 -360 16 -360
WIRE 672 -360 224 -360
WIRE 736 -360 672 -360
WIRE 832 -360 736 -360
WIRE -624 -344 -624 -360
WIRE 224 -344 224 -360
WIRE 736 -344 736 -360
WIRE 832 -344 832 -360
WIRE -336 -264 -576 -264
WIRE 176 -264 16 -264
WIRE 736 -248 736 -280
WIRE 832 -248 832 -264
WIRE -480 -168 -480 -440
WIRE -336 -168 -480 -168
WIRE 80 -168 80 -440
WIRE 80 -168 16 -168
WIRE -480 -152 -480 -168
WIRE 80 -152 80 -168
WIRE -688 -72 -688 -584
WIRE -624 -72 -624 -248
WIRE -624 -72 -688 -72
WIRE -480 -72 -480 -88
WIRE -480 -72 -624 -72
WIRE -336 -72 -480 -72
WIRE 80 -72 80 -88
WIRE 80 -72 16 -72
WIRE 224 -72 224 -248
WIRE 224 -72 80 -72
WIRE 368 -72 368 -584
WIRE 368 -72 224 -72
WIRE -624 24 -624 -72
WIRE -624 24 -816 24
WIRE -336 24 -624 24
WIRE 224 24 224 -72
WIRE 224 24 16 24
WIRE 352 24 224 24
WIRE -624 40 -624 24
WIRE 224 40 224 24
WIRE 672 40 672 -360
WIRE 672 40 560 40
WIRE 784 40 672 40
WIRE -816 56 -816 24
WIRE 352 56 352 24
WIRE 560 56 560 40
WIRE 672 56 672 40
WIRE 784 56 784 40
WIRE -336 120 -576 120
WIRE 176 120 16 120
WIRE -816 152 -816 120
WIRE -624 152 -624 136
WIRE 224 152 224 136
WIRE 352 152 352 120
WIRE 672 152 672 136
WIRE 784 152 784 120
WIRE 784 152 672 152
WIRE 560 168 560 136
WIRE 560 168 464 168
WIRE 560 184 560 168
WIRE -416 216 -432 216
WIRE -336 216 -352 216
WIRE 464 216 464 168
WIRE 464 216 16 216
WIRE 560 280 560 264
WIRE -336 312 -352 312
WIRE 64 312 16 312
WIRE 672 312 672 152
WIRE 672 312 64 312
WIRE 64 328 64 312
WIRE 672 328 672 312
WIRE -336 408 -352 408
WIRE 64 408 64 392
WIRE 64 408 16 408
WIRE 672 424 672 408
WIRE -240 488 -240 472
WIRE -160 488 -160 472
WIRE -80 488 -80 472
WIRE -240 584 -240 568
WIRE -80 584 -80 568
FLAG -832 -424 0
FLAG -624 152 0
FLAG 224 152 0
FLAG -816 152 0
FLAG 352 152 0
FLAG 736 -248 0
FLAG 832 -248 0
FLAG 672 424 0
FLAG 560 280 0
FLAG -80 584 0
FLAG -160 488 0
FLAG -240 584 0
FLAG -432 216 0
FLAG -352 312 0
FLAG -352 408 0
FLAG 832 -360 OUT
FLAG -832 -536 IN
SYMBOL VOLTAGE -832 -536 R0
SYMATTR InstName V1
SYMATTR Value 3.6
SYMBOL nmos -576 -344 M0
SYMATTR InstName Q1
SYMATTR Value FDS6890A
SYMBOL nmos -576 40 M0
SYMATTR InstName Q2
SYMATTR Value FDS6890A
SYMBOL schottky -496 -504 R0
SYMATTR InstName D1
SYMATTR Value CMDSH2-3
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap -496 -152 R0
SYMATTR InstName C1
SYMATTR Value .22
SYMBOL ind -144 -568 R270
SYMATTR InstName L1
SYMATTR Value 2.2
SYMATTR SpiceLine Rpar=1K
SYMBOL nmos 176 -344 R0
SYMATTR InstName Q3
SYMATTR Value FDS6890A
SYMBOL schottky 64 -504 R0
SYMATTR InstName D2
SYMATTR Value CMDSH2-3
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 64 -152 R0
SYMATTR InstName C2
SYMATTR Value .22
SYMBOL nmos 176 40 R0
SYMATTR InstName Q4
SYMATTR Value FDS6890A
SYMBOL schottky -832 120 M180
SYMATTR InstName D3
SYMATTR Value PMEG2020AEA
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 336 120 M180
SYMATTR InstName D4
SYMATTR Value PMEG2020AEA
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 720 -344 R0
SYMATTR InstName C3
SYMATTR Value 220
SYMATTR SpiceLine Rser=2m
SYMBOL res 656 40 R0
SYMATTR InstName R1
SYMATTR Value 215K
SYMBOL res 656 312 R0
SYMATTR InstName R2
SYMATTR Value 127K
SYMBOL cap 768 56 R0
SYMATTR SpiceLine Rser=10K
SYMATTR Value 220p
SYMATTR InstName C4
SYMBOL cap 48 328 R0
SYMATTR Value 470p
SYMATTR SpiceLine Rser=31.6K Cpar=10p
SYMATTR InstName C5
SYMBOL res 544 40 R0
SYMATTR InstName R3
SYMATTR Value 215K
SYMBOL res 544 168 R0
SYMATTR InstName R4
SYMATTR Value 127K
SYMBOL res -96 472 R0
SYMATTR InstName R5
SYMATTR Value 42.2K
SYMBOL res -256 472 R0
SYMATTR InstName R6
SYMATTR Value 49.9K
SYMBOL cap -352 200 R90
SYMATTR InstName C6
SYMATTR Value 500p
SYMBOL res 816 -360 R0
SYMATTR InstName Rload
SYMATTR Value 5
SYMBOL PowerProducts\\LTC3785-1 -160 -24 R0
SYMATTR InstName U1