* SPICE netlist
MQ1 N002 N017 0 0 SPA11N60C3
C2 N011 N012 .047 Rser=330K Cpar=.0047
V1 N007 0 17
C4 N010 N013 100p Rser=10K Cpar=10p
L1 N001 N002 750
R3 N001 N005 1Meg
C5 N005 0 4700p
D1 N002 OUT UPSC600
R4 0 N003 .2
V2 N001 N003 180
R5 N014 0 20K
R6 OUT N014 1Meg
XU1 0 N006 N013 N010 N004 N005 N011 N014 N008 N009 N012 N015 N018 N016 N007 N017 LT1248 ;pnba GND)PKlim)CAout)Isense)Mout)Iac)VAout)OVP)Ref)Enable)Vsense)Rset)SS)Cset)Vcc)GTDR
R7 N014 N012 20K
R8 N004 N003 4K
C7 N018 0 .02 Rser=5K
C8 N016 0 1000p
R9 N015 0 15K
R10 N008 N006 10K
R11 N010 0 4K
R12 N006 N003 1.6K
C9 N006 0 1000p
Rload OUT 0 2K
C1 OUT 0 18
.tran 30m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1408 800
WIRE -16 -400 -672 -400
WIRE 224 -400 -16 -400
WIRE 416 -400 304 -400
WIRE 448 -400 416 -400
WIRE 544 -400 512 -400
WIRE 608 -400 544 -400
WIRE 704 -400 608 -400
WIRE -672 -384 -672 -400
WIRE 608 -384 608 -400
WIRE 704 -384 704 -400
WIRE -16 -368 -16 -400
WIRE -672 -288 -672 -304
WIRE -480 -288 -672 -288
WIRE -384 -288 -480 -288
WIRE -208 -288 -304 -288
WIRE 608 -288 608 -320
WIRE 704 -288 704 -304
WIRE -672 -272 -672 -288
WIRE -480 -272 -480 -288
WIRE -16 -272 -16 -288
WIRE 96 -272 -16 -272
WIRE 192 -272 160 -272
WIRE -208 -256 -208 -288
WIRE -16 -256 -16 -272
WIRE -672 -176 -672 -192
WIRE -480 -176 -480 -192
WIRE -304 -176 -480 -176
WIRE 192 -176 80 -176
WIRE 288 -176 272 -176
WIRE -560 -96 -608 -96
WIRE -480 -96 -480 -176
WIRE -480 -96 -496 -96
WIRE -448 -96 -480 -96
WIRE -304 -96 -368 -96
WIRE 112 -96 80 -96
WIRE 544 -48 544 -400
WIRE -688 -16 -704 -16
WIRE -576 -16 -608 -16
WIRE -304 -16 -576 -16
WIRE 144 -16 80 -16
WIRE 256 -16 208 -16
WIRE -576 64 -576 48
WIRE -304 64 -576 64
WIRE 256 64 256 -16
WIRE 256 64 80 64
WIRE 272 64 256 64
WIRE 368 64 352 64
WIRE 544 64 544 32
WIRE 544 64 368 64
WIRE 544 80 544 64
WIRE -400 144 -416 144
WIRE -304 144 -320 144
WIRE 368 144 368 64
WIRE 368 144 80 144
WIRE 416 144 416 -400
WIRE 544 176 544 160
WIRE -400 224 -416 224
WIRE -304 224 -336 224
WIRE 368 224 80 224
WIRE 416 256 416 240
WIRE -208 320 -208 304
WIRE -16 336 -16 304
WIRE -208 400 -208 384
FLAG -16 336 0
FLAG 416 256 0
FLAG 288 -176 0
FLAG 192 -272 0
FLAG 608 -288 0
FLAG -672 -176 0
FLAG 704 -288 0
FLAG 704 -400 OUT
FLAG 544 176 0
FLAG -208 400 0
FLAG -416 224 0
FLAG -416 144 0
FLAG -704 -16 0
FLAG -608 -96 0
SYMBOL NMOS 368 144 R0
SYMATTR InstName Q1
SYMATTR Value SPA11N60C3
SYMBOL cap 144 0 R270
SYMATTR InstName C2
SYMATTR Value .047
SYMATTR SpiceLine Rser=330K
SYMATTR SpiceLine2 Cpar=.0047
SYMBOL VOLTAGE 176 -176 R270
SYMATTR InstName V1
SYMATTR Value 17
SYMBOL cap -592 -16 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMATTR SpiceLine Rser=10K Cpar=10p
SYMBOL ind2 208 -384 R270
SYMATTR InstName L1
SYMATTR Value 750
SYMBOL res -32 -384 R0
SYMATTR InstName R3
SYMATTR Value 1Meg
SYMBOL cap 96 -256 R270
SYMATTR InstName C5
SYMATTR Value 4700p
SYMBOL diode 448 -384 R270
SYMATTR InstName D1
SYMATTR Value UPSC600
SYMBOL res -688 -176 M180
SYMATTR InstName R4
SYMATTR Value .2
SYMBOL voltage -672 -400 R0
SYMATTR InstName V2
SYMATTR Value 180
SYMBOL res 528 64 R0
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL res 528 -64 R0
SYMATTR InstName R6
SYMATTR Value 1Meg
SYMBOL POWERPRODUCTS\\LT1248 -112 64 R0
SYMATTR InstName U1
SYMBOL res 368 48 R90
SYMATTR InstName R7
SYMATTR Value 20K
SYMBOL res -288 -304 R90
SYMATTR InstName R8
SYMATTR Value 4K
SYMBOL cap -224 320 R0
SYMATTR Value .02
SYMATTR SpiceLine Rser=5K
SYMATTR InstName C7
SYMBOL cap -336 208 R90
SYMATTR InstName C8
SYMATTR Value 1000p
SYMBOL res -304 128 R90
SYMATTR InstName R9
SYMATTR Value 15K
SYMBOL res -352 -80 M270
SYMATTR InstName R10
SYMATTR Value 10K
SYMBOL res -592 -32 R90
SYMATTR InstName R11
SYMATTR Value 4K
SYMBOL res -496 -176 M180
SYMATTR InstName R12
SYMATTR Value 1.6K
SYMBOL cap -496 -112 R90
SYMATTR InstName C9
SYMATTR Value 1000p
SYMBOL res 688 -400 R0
SYMATTR InstName Rload
SYMATTR Value 2K
SYMBOL cap 592 -384 R0
SYMATTR InstName C1
SYMATTR Value 18