* SPICE netlist
MQ1 N007 N014 0 0 Si4842DY
R1 N015 0 100K
D1 N001 N009 BAT54
C1 N001 0 4.7
D2 0 N007 1N5818
MQ2 IN N005 N007 N007 Si4842DY
L1 N007 OUT 1.2
C2 N010 0 1000p Rser=10K
V1 IN 0 12
C3 N006 0 .001
C4 N007 N009 .22
C6 N011 0 .01 Rser=10K
XU1 N008 N012 N010 0 N015 N013 MP_01 OUT 0 MP_02 N006 N011 NC_03 IN IN MP_04 0 MP_05 N001 N001 N014 0 0 N007 N007 N005 N009 N003 N002 N002 OUT N004 LTC3823 ;pnba Vrng)FB)Ith)SGND)Ion)Vdiffout))Voutsense+)Voutsense-))Track/SS)PLLFLTR)PLLIN)Vin)Vinsns))Z1/SSenable))INTVcc)DRVcc)BG)PGND)Sense-)Sense+)SW)TG)Boost)Z0)FCB)Run)Von)Pgood
C7 OUT 0 220
C8 N013 N012 200p Rpar=16.2K
R2 N012 0 5.11K
R3 N001 N004 100K
R4 N001 N003 23.2K
R5 N003 0 27.1K
R6 N001 N008 42.5K
R7 N008 0 7.5K
Rload OUT 0 .25
.tran 750u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1232 992
WIRE -392 -496 -488 -496
WIRE 200 -496 -392 -496
WIRE -392 -480 -392 -496
WIRE -40 -480 -200 -480
WIRE 264 -480 -40 -480
WIRE 328 -480 264 -480
WIRE 328 -464 328 -480
WIRE 88 -432 88 -448
WIRE -392 -400 -392 -416
WIRE -200 -384 -200 -480
WIRE -40 -384 -40 -480
WIRE 328 -368 328 -384
WIRE -296 -320 -328 -320
WIRE 88 -320 88 -352
WIRE 88 -320 56 -320
WIRE 104 -320 88 -320
WIRE 200 -320 200 -496
WIRE 200 -320 184 -320
WIRE 264 -272 264 -480
WIRE -328 -256 -328 -320
WIRE -296 -256 -328 -256
WIRE 72 -256 56 -256
WIRE -488 -192 -488 -496
WIRE -440 -192 -488 -192
WIRE -296 -192 -360 -192
WIRE 216 -192 56 -192
WIRE -488 -160 -488 -192
WIRE -296 -128 -312 -128
WIRE 104 -128 56 -128
WIRE 264 -128 264 -176
WIRE 264 -128 104 -128
WIRE 296 -128 264 -128
WIRE 344 -128 296 -128
WIRE 440 -128 424 -128
WIRE 504 -128 440 -128
WIRE 616 -128 504 -128
WIRE 616 -112 616 -128
WIRE 296 -96 296 -128
WIRE 504 -96 504 -128
WIRE -600 -64 -616 -64
WIRE -488 -64 -488 -80
WIRE -488 -64 -520 -64
WIRE -296 -64 -488 -64
WIRE 104 -64 56 -64
WIRE 104 -32 104 -64
WIRE 296 -16 296 -32
WIRE 504 -16 504 -32
WIRE 616 -16 616 -32
WIRE -440 0 -488 0
WIRE -296 0 -376 0
WIRE 72 0 56 0
WIRE 72 64 72 0
WIRE 72 64 56 64
WIRE 104 64 104 32
WIRE 104 64 72 64
WIRE 200 64 200 -320
WIRE 200 64 104 64
WIRE 264 112 264 -128
WIRE 264 112 200 112
WIRE -392 128 -408 128
WIRE -296 128 -328 128
WIRE 200 128 200 112
WIRE 200 128 56 128
WIRE -472 192 -520 192
WIRE -296 192 -408 192
WIRE 216 192 56 192
WIRE -520 256 -520 192
WIRE -296 256 -520 256
WIRE 264 256 264 208
WIRE 264 256 56 256
WIRE -520 272 -520 256
WIRE 264 272 264 256
WIRE -296 320 -440 320
WIRE 440 320 440 -128
WIRE 440 320 56 320
WIRE -520 368 -520 352
WIRE -392 384 -408 384
WIRE -296 384 -312 384
WIRE 72 384 56 384
WIRE -200 464 -200 448
WIRE -40 464 -40 448
WIRE -440 496 -440 320
WIRE 440 496 440 320
WIRE 440 496 -440 496
FLAG -200 464 0
FLAG 264 272 0
FLAG -392 -400 0
FLAG 296 -16 0
FLAG 616 -16 0
FLAG -488 0 0
FLAG 328 -368 0
FLAG -376 -128 0
FLAG 328 -480 IN
FLAG 616 -128 OUT
FLAG -40 464 0
FLAG -408 128 0
FLAG -408 384 0
FLAG 504 -16 0
FLAG 72 -256 0
FLAG 72 384 0
FLAG -520 368 0
FLAG 88 -448 0
FLAG -616 -64 0
SYMBOL NMOS 216 112 R0
SYMATTR InstName Q1
SYMATTR Value Si4842DY
SYMBOL RES -296 400 M270
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL schottky 88 32 M180
SYMATTR InstName D1
SYMATTR Value BAT54
SYMBOL cap -408 -480 R0
SYMATTR Value 4.7
SYMATTR InstName C1
SYMBOL schottky 280 -32 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 216 -272 R0
SYMATTR InstName Q2
SYMATTR Value Si4842DY
SYMBOL ind 328 -112 R270
SYMATTR InstName L1
SYMATTR Value 1.2
SYMBOL cap -376 -16 R90
SYMATTR InstName C2
SYMATTR Value 1000p
SYMATTR SpiceLine Rser=10K
SYMBOL VOLTAGE 328 -480 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap -312 -144 R90
SYMATTR InstName C3
SYMATTR Value .001
SYMBOL cap 88 -128 R0
SYMATTR InstName C4
SYMATTR Value .22
SYMBOL cap -328 112 R90
SYMATTR InstName C6
SYMATTR Value .01
SYMATTR SpiceLine Rser=10K
SYMBOL PowerProducts\\LTC3823 -120 32 R0
SYMATTR InstName U1
SYMBOL cap 488 -96 R0
SYMATTR Value 220
SYMATTR InstName C7
SYMBOL cap -408 176 R90
SYMATTR InstName C8
SYMATTR Value 200p
SYMATTR SpiceLine Rpar=16.2K
SYMBOL res -536 256 R0
SYMATTR Value 5.11K
SYMATTR InstName R2
SYMBOL res -456 -176 R270
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL res 200 -336 R90
SYMATTR InstName R4
SYMATTR Value 23.2K
SYMBOL res 72 -336 M180
SYMATTR InstName R5
SYMATTR Value 27.1K
SYMBOL res -504 -176 R0
SYMATTR InstName R6
SYMATTR Value 42.5K
SYMBOL res -504 -80 R90
SYMATTR InstName R7
SYMATTR Value 7.5K
SYMBOL res 600 -128 R0
SYMATTR InstName Rload
SYMATTR Value .25