* SPICE netlist
MQ1 IN N005 N006 N006 Si7370DP
MQ2 N006 N009 0 0 Si7370DP
D1 N001 N002 MBRS140
C1 N002 N006 1
R1 IN N003 1Meg
R2 N011 N010 20K
C2 N010 0 2200p
D2 0 N006 MBRS1100
L1 N006 N007 15 Rpar=2K
R3 N007 OUT 10m
R4 N008 0 49.9K
C3 N004 0 .002
C4 OUT 0 100
V1 IN 0 36
D3 OUT N001 1N4148
XU1 IN N003 N004 0 N012 N011 MP_01 N008 OUT N007 0 N009 N001 N006 N005 N002 0 LT3845 ;pnba Vin)_SHDN)Css)Burst_EN)FB)Vc))Fset)Sense-)Sense+)PGND)BG)Vcc)SW)TG)Boost)SGND
R5 N012 OUT 143K
R6 0 N012 16.2K
C5 N001 0 1
R7 N003 0 82.5K
Rload OUT 0 2
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1168 704
WIRE -440 -352 -552 -352
WIRE -264 -352 -440 -352
WIRE 136 -352 -264 -352
WIRE -552 -336 -552 -352
WIRE -440 -304 -440 -352
WIRE 40 -304 -136 -304
WIRE 440 -304 104 -304
WIRE -216 -256 -232 -256
WIRE -136 -256 -136 -304
WIRE -136 -256 -152 -256
WIRE -88 -256 -136 -256
WIRE 24 -256 -24 -256
WIRE -552 -240 -552 -256
WIRE -264 -208 -264 -352
WIRE -136 -208 -136 -256
WIRE -536 -160 -552 -160
WIRE -440 -160 -440 -224
WIRE -440 -160 -456 -160
WIRE -392 -160 -440 -160
WIRE 24 -160 24 -256
WIRE 24 -160 -8 -160
WIRE 136 -160 136 -352
WIRE -488 -80 -520 -80
WIRE -392 -80 -424 -80
WIRE 88 -80 -8 -80
WIRE -392 0 -424 0
WIRE 24 0 24 -96
WIRE 24 0 -8 0
WIRE 136 0 136 -64
WIRE 136 0 24 0
WIRE 184 0 136 0
WIRE 232 0 184 0
WIRE 328 0 312 0
WIRE 344 0 328 0
WIRE 440 0 440 -304
WIRE 440 0 424 0
WIRE 488 0 440 0
WIRE 584 0 488 0
WIRE 488 16 488 0
WIRE 584 16 584 0
WIRE 184 32 184 0
WIRE -488 80 -520 80
WIRE -392 80 -408 80
WIRE 88 80 -8 80
WIRE 136 112 136 96
WIRE 184 112 184 96
WIRE 488 112 488 80
WIRE 584 112 584 96
WIRE -568 160 -584 160
WIRE -488 160 -504 160
WIRE -392 160 -408 160
WIRE 328 160 328 0
WIRE 328 160 -8 160
WIRE -392 240 -424 240
WIRE 440 240 440 0
WIRE 440 240 -8 240
WIRE -264 304 -264 288
WIRE -136 304 -136 288
WIRE -536 336 -552 336
WIRE -424 336 -424 240
WIRE -424 336 -456 336
WIRE 40 336 -424 336
WIRE 440 336 440 240
WIRE 440 336 120 336
FLAG 136 112 0
FLAG -584 160 0
FLAG -136 304 0
FLAG 488 112 0
FLAG 584 112 0
FLAG -552 -240 0
FLAG 584 0 OUT
FLAG -552 -352 IN
FLAG 184 112 0
FLAG -264 304 0
FLAG -520 -80 0
FLAG -424 0 0
FLAG -520 80 0
FLAG -552 336 0
FLAG -232 -256 0
FLAG -552 -160 0
SYMBOL nmos 88 -160 R0
SYMATTR InstName Q1
SYMATTR Value Si7370DP
SYMBOL nmos 88 0 R0
SYMATTR InstName Q2
SYMATTR Value Si7370DP
SYMBOL schottky -88 -240 R270
SYMATTR InstName D1
SYMATTR Value MBRS140
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 8 -160 R0
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL res -456 -320 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res -392 144 R90
SYMATTR InstName R2
SYMATTR Value 20K
SYMBOL cap -504 144 R90
SYMATTR InstName C2
SYMATTR Value 2200p
SYMBOL schottky 168 96 M180
SYMATTR InstName D2
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind 216 16 R270
SYMATTR InstName L1
SYMATTR Value 15
SYMATTR SpiceLine Rpar=2K
SYMBOL res 328 16 R270
SYMATTR InstName R3
SYMATTR Value 10m
SYMBOL res -392 64 R90
SYMATTR InstName R4
SYMATTR Value 49.9K
SYMBOL cap -424 -96 R90
SYMATTR InstName C3
SYMATTR Value .002
SYMBOL cap 472 16 R0
SYMATTR InstName C4
SYMATTR Value 100
SYMBOL voltage -552 -352 R0
SYMATTR Value 36
SYMATTR InstName V1
SYMBOL diode 104 -320 R90
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL PowerProducts\\LT3845 -200 32 R0
SYMATTR InstName U1
SYMBOL res 24 352 R270
SYMATTR InstName R5
SYMATTR Value 143K
SYMBOL res -552 352 R270
SYMATTR InstName R6
SYMATTR Value 16.2K
SYMBOL cap -152 -272 R90
SYMATTR InstName C5
SYMATTR Value 1
SYMBOL res -440 -176 R90
SYMATTR InstName R7
SYMATTR Value 82.5K
SYMBOL res 568 0 R0
SYMATTR InstName Rload
SYMATTR Value 2