* SPICE netlist
XU1 0 N009 N008 0 N007 N004 N002 IN N003 N005 LTC4441 ;pnba PGND)Blank)Rblank)SGND)IN)EN/SHDN)FB)Vin)DRVcc)OUT
MQ1 N001 N005 N006 N006 Si7370DP
R1 N006 0 5m
R2 N008 0 100K
R3 N002 0 86.6K
R4 N003 N002 330K
C1 N003 0 10
R5 IN N004 100K
R6 N004 0 20K
L1 IN N001 10 Rpar=2K
D1 N001 OUT MBR745
C2 OUT 0 25
XU2 N011 0 N012 N009 IN N007 LTC3803 ;pnba Ith/Run)GND)FB)Sense)Vcc)Ngate
R7 N006 N009 250
V1 IN 0 10
R8 N012 0 10K
R9 OUT N012 300K
C3 N010 0 .0047
R10 N011 N010 56K
Rload OUT 0 100
.tran 4m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1312 736
WIRE -336 -368 -416 -368
WIRE -240 -368 -336 -368
WIRE 128 -368 -240 -368
WIRE 272 -368 128 -368
WIRE 400 -368 352 -368
WIRE 432 -368 400 -368
WIRE 528 -368 496 -368
WIRE 592 -368 528 -368
WIRE 656 -368 592 -368
WIRE -416 -352 -416 -368
WIRE 528 -352 528 -368
WIRE 656 -352 656 -368
WIRE -144 -304 -160 -304
WIRE -48 -304 -64 -304
WIRE 160 -304 -48 -304
WIRE 304 -304 240 -304
WIRE 336 -304 304 -304
WIRE 336 -288 336 -304
WIRE -416 -256 -416 -272
WIRE 128 -256 128 -368
WIRE 528 -256 528 -288
WIRE 656 -256 656 -272
WIRE -240 -224 -240 -368
WIRE -48 -208 -48 -304
WIRE -32 -208 -48 -208
WIRE 304 -208 304 -304
WIRE 304 -208 288 -208
WIRE 336 -208 336 -224
WIRE 400 -192 400 -368
WIRE -240 -112 -240 -144
WIRE -32 -112 -240 -112
WIRE 352 -112 288 -112
WIRE -240 -96 -240 -112
WIRE 496 -96 400 -96
WIRE 496 -48 496 -96
WIRE -32 -16 -176 -16
WIRE 400 -16 288 -16
WIRE -240 0 -240 -16
WIRE 400 0 400 -16
WIRE -336 80 -336 -368
WIRE -128 80 -144 80
WIRE -32 80 -48 80
WIRE 496 80 496 32
WIRE 496 80 288 80
WIRE -176 128 -176 -16
WIRE -176 128 -208 128
WIRE 128 144 128 128
WIRE -640 192 -656 192
WIRE -560 192 -576 192
WIRE -464 192 -480 192
WIRE 496 192 496 80
WIRE 496 192 -208 192
WIRE -128 256 -208 256
WIRE -48 256 -128 256
WIRE 592 256 592 -368
WIRE 592 256 32 256
WIRE -128 272 -128 256
WIRE -336 320 -336 304
WIRE -128 368 -128 352
FLAG 400 0 0
FLAG 128 144 0
FLAG -144 80 0
FLAG -160 -304 0
FLAG 336 -208 0
FLAG -240 0 0
FLAG 528 -256 0
FLAG -416 -256 0
FLAG -336 320 0
FLAG -128 368 0
FLAG -656 192 0
FLAG 656 -256 0
FLAG 656 -368 OUT
FLAG -416 -368 IN
SYMBOL PowerProducts\\LTC4441 128 -64 R0
SYMATTR InstName U1
SYMBOL nmos 352 -192 R0
SYMATTR InstName Q1
SYMATTR Value Si7370DP
SYMBOL res 384 -112 R0
SYMATTR InstName R1
SYMATTR Value 5m
SYMBOL res -32 64 R90
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res -48 -320 R90
SYMATTR InstName R3
SYMATTR Value 86.6K
SYMBOL res 256 -320 R90
SYMATTR InstName R4
SYMATTR Value 330K
SYMBOL cap 320 -288 R0
SYMATTR InstName C1
SYMATTR Value 10
SYMBOL res -256 -240 R0
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL res -256 -112 R0
SYMATTR InstName R6
SYMATTR Value 20K
SYMBOL ind 256 -352 R270
SYMATTR InstName L1
SYMATTR Value 10
SYMATTR SpiceLine Rpar=2K
SYMBOL schottky 432 -352 R270
SYMATTR InstName D1
SYMATTR Value MBR745
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 512 -352 R0
SYMATTR InstName C2
SYMATTR Value 25
SYMBOL PowerProducts\\LTC3803 -336 192 R0
SYMATTR InstName U2
SYMBOL res 480 -64 R0
SYMATTR InstName R7
SYMATTR Value 250
SYMBOL voltage -416 -368 R0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL res -144 256 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL res 48 240 R90
SYMATTR InstName R9
SYMATTR Value 300K
SYMBOL cap -576 176 R90
SYMATTR InstName C3
SYMATTR Value .0047
SYMBOL res -464 176 R90
SYMATTR InstName R10
SYMATTR Value 56K
SYMBOL res 640 -368 R0
SYMATTR InstName Rload
SYMATTR Value 100