* SPICE netlist
S1 VOUT RTN N005 0 SHORT
S2 VOUT RTN RTN N007 LOAD
S3 VOUT RTN RTN N003 LOAD
V1 0 RTN PWL(0 0 10u -48 200m -48 +10u -48 +1m -48 +1u -48 300m -48)
V2 N005 0 PWL(0 0 200m 0 200.001m 0 220m 0 220.1m 0)
C1 N002 0 .01
R1 RTN N002 453K
R2 N002 N004 1
R3 N004 N006 16.9K
R4 N006 0 11.8K
C2 N008 0 .1
R5 N016 0 .008
R6 N013 N014 10
MQ1 VOUT N013 N016 N016 IRF1310
C3 0 N014 .047
C4 N001 0 1
R7 RTN N001 4K
R8 RTN N003 24K
R9 RTN N007 24K
C5 RTN VOUT 330
C6 N011 0 .220
C7 N012 0 .047
C8 0 N009 .033
R10 N009 N015 1K
R11 N010 VOUT 1Meg
C9 N015 VOUT .01
XU1 N001 N002 N004 N006 N008 N008 N011 N012 0 N016 N013 N010 N009 N007 N003 0 0 LTC4261 OVRTRY=1 UVRTRY=1 OCRTRY=0 PBRTRY=0 ;pnba Vin)UVL)UVH)OV)INTVcc)ON)SS)TMR)_EN)Sense)Gate)Drain)Ramp)_PG)PGIO)_PGI)Vee
.tran 300m

* LTspice schematic (.asc)
Version 4
SHEET 1 2000 672
WIRE -808 -336 -1000 -336
WIRE -232 -336 -808 -336
WIRE 312 -336 -232 -336
WIRE 408 -336 312 -336
WIRE 504 -336 408 -336
WIRE 584 -336 504 -336
WIRE 648 -336 584 -336
WIRE 728 -336 648 -336
WIRE 824 -336 728 -336
WIRE 856 -336 824 -336
WIRE -232 -320 -232 -336
WIRE -808 -304 -808 -336
WIRE 312 -304 312 -336
WIRE 408 -304 408 -336
WIRE 504 -304 504 -336
WIRE 728 -240 728 -336
WIRE -232 -224 -232 -240
WIRE -184 -224 -232 -224
WIRE -88 -224 -120 -224
WIRE 648 -224 648 -336
WIRE 680 -224 648 -224
WIRE -808 -208 -808 -224
WIRE -808 -208 -904 -208
WIRE -712 -208 -808 -208
WIRE -808 -192 -808 -208
WIRE -904 -176 -904 -208
WIRE -232 -176 -232 -224
WIRE 312 -176 312 -224
WIRE 680 -176 312 -176
WIRE -712 -144 -712 -208
WIRE -600 -144 -712 -144
WIRE 184 -144 136 -144
WIRE 648 -112 648 -224
WIRE -808 -96 -808 -112
WIRE -600 -96 -808 -96
WIRE 312 -96 312 -176
WIRE 312 -96 136 -96
WIRE 584 -96 584 -336
WIRE 600 -96 584 -96
WIRE 824 -96 824 -336
WIRE 1000 -96 936 -96
WIRE -808 -80 -808 -96
WIRE 936 -80 936 -96
WIRE 936 -80 872 -80
WIRE 1000 -80 1000 -96
WIRE -600 -48 -712 -48
WIRE 408 -48 408 -224
WIRE 408 -48 136 -48
WIRE 600 -48 408 -48
WIRE 936 -32 872 -32
WIRE -600 0 -664 0
WIRE 408 0 136 0
WIRE 504 0 504 -240
WIRE 648 0 648 -32
WIRE 648 0 504 0
WIRE -808 16 -808 0
WIRE -712 16 -712 -48
WIRE -712 16 -808 16
WIRE 936 16 936 -32
WIRE 1000 16 1000 0
WIRE 1000 16 936 16
WIRE -808 32 -808 16
WIRE 936 32 936 16
WIRE -664 48 -664 0
WIRE -600 48 -664 48
WIRE 312 48 136 48
WIRE 408 48 408 0
WIRE 504 48 408 48
WIRE 408 80 408 48
WIRE 504 80 504 48
WIRE -664 160 -664 48
WIRE -552 160 -552 112
WIRE -424 160 -424 112
WIRE 88 160 88 112
WIRE 104 160 88 160
WIRE 200 160 184 160
WIRE 200 176 200 160
WIRE 504 176 504 144
WIRE 312 192 312 48
WIRE 408 192 408 160
WIRE -1000 208 -1000 -336
WIRE 88 256 88 160
WIRE 200 256 200 240
WIRE -168 288 -168 112
WIRE -40 288 -40 112
WIRE -1000 304 -1000 288
WIRE -904 304 -904 -112
WIRE -904 304 -1000 304
WIRE -808 304 -808 112
WIRE -808 304 -904 304
WIRE -664 304 -664 224
WIRE -664 304 -808 304
WIRE -552 304 -552 224
WIRE -552 304 -664 304
WIRE -424 304 -424 224
WIRE -424 304 -552 304
WIRE -296 304 -296 112
WIRE -296 304 -424 304
WIRE -152 304 -168 288
WIRE -152 304 -296 304
WIRE -56 304 -40 288
WIRE -56 304 -72 304
WIRE 72 304 -56 304
WIRE 312 304 312 272
WIRE 312 304 168 304
WIRE 408 304 408 256
WIRE 408 304 312 304
WIRE 648 304 648 0
WIRE 648 304 408 304
WIRE 728 304 728 -160
WIRE 728 304 648 304
WIRE 824 304 824 -16
WIRE 824 304 728 304
WIRE 856 304 824 304
WIRE -1000 336 -1000 304
FLAG 856 304 VOUT
FLAG 856 -336 RTN
FLAG 184 -144 0
FLAG -88 -224 0
FLAG 200 256 0
FLAG 504 176 0
FLAG 936 32 0
FLAG -1000 336 0
SYMBOL SW 824 0 R180
SYMATTR InstName S1
SYMATTR Value SHORT
SYMBOL SW 648 -16 M180
SYMATTR InstName S2
SYMATTR Value LOAD
SYMBOL SW 728 -144 M180
SYMATTR InstName S3
SYMATTR Value LOAD
SYMBOL voltage -1000 304 M180
SYMATTR Value PWL(0 0 10u -48 200m -48 +10u -48 +1m -48 +1u -48 300m -48)
SYMATTR InstName V1
SYMBOL voltage 1000 -96 R0
SYMATTR Value PWL(0 0 200m 0 200.001m 0 220m 0 220.1m 0)
SYMATTR InstName V2
SYMBOL cap -920 -176 R0
SYMATTR InstName C1
SYMATTR Value .01
SYMBOL res -824 -320 R0
SYMATTR InstName R1
SYMATTR Value 453K
SYMBOL res -824 -208 R0
SYMATTR InstName R2
SYMATTR Value 1
SYMBOL res -824 -96 R0
SYMATTR InstName R3
SYMATTR Value 16.9K
SYMBOL res -824 16 R0
SYMATTR InstName R4
SYMATTR Value 11.8K
SYMBOL cap -680 160 R0
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL res -56 288 R90
SYMATTR InstName R5
SYMATTR Value .008
SYMBOL res 88 176 R270
SYMATTR InstName R6
SYMATTR Value 10
SYMBOL nmos 168 256 R90
SYMATTR InstName Q1
SYMATTR Value IRF1310
SYMATTR Prefix ""
SYMBOL cap 184 240 M180
SYMATTR InstName C3
SYMATTR Value .047
SYMBOL cap -184 -208 R270
SYMATTR InstName C4
SYMATTR Value 1
SYMBOL res -248 -336 R0
SYMATTR InstName R7
SYMATTR Value 4K
SYMBOL res 296 -320 R0
SYMATTR InstName R8
SYMATTR Value 24K
SYMBOL res 392 -320 R0
SYMATTR InstName R9
SYMATTR Value 24K
SYMBOL cap 488 -304 R0
SYMATTR InstName C5
SYMATTR Value 330
SYMBOL cap -568 160 R0
SYMATTR InstName C6
SYMATTR Value .220
SYMBOL cap -440 160 R0
SYMATTR InstName C7
SYMATTR Value .047
SYMBOL cap 488 144 M180
SYMATTR InstName C8
SYMATTR Value .033
SYMBOL res 392 64 R0
SYMATTR InstName R10
SYMATTR Value 1K
SYMBOL res 296 176 R0
SYMATTR InstName R11
SYMATTR Value 1Meg
SYMBOL cap 392 192 R0
SYMATTR InstName C9
SYMATTR Value .01
SYMBOL PowerProducts\\LTC4261 -232 -64 R0
SYMATTR InstName U1