* SPICE netlist
Rclass N007 N004 30.9
R2 N003 N006 100K
R3 N003 N008 100K
R1 N003 N005 100K
Cload N003 N009 100 Rser=10m
C1 N003 N004 .22 Rser=10m
D1 0 N003 MURS120
D2 N004 N013 MURS120
Rload N003 N009 1.3K
XU1 N004 N005 N007 MP_01 N004 N004 N009 N009 N008 N006 MP_02 N003 LTC4265 ;pnba SHDN)_T2PSE)Rclass))Vin1)Vin)Vout1)Vout)PWRGD)_PWRGD))GND
XU2 N001 0 0 N011 N012 N010 N013 Status Class N002 NC_03 NC_04 NC_05 LTC4274 ;pnba Vdd)Dgnd)Agnd)Vee)Sense)Gate)Out)>Status)>Class)Auto)Mid)_Reset)_Shdn
V1 N002 0 3.3
V2 N001 0 PWL(0 0 100u 3.3)
M1 N013 N010 N012 N012 BSH114
R4 N012 N011 .25
V3 0 N011 56
.tran 1

* LTspice schematic (.asc)
Version 4
SHEET 1 2640 736
WIRE -664 -352 -664 -368
WIRE -664 -240 -664 -272
WIRE -1064 -160 -1320 -160
WIRE -1320 -144 -1320 -160
WIRE -200 -128 -264 -128
WIRE -1320 -48 -1320 -64
WIRE 8 -32 -56 -32
WIRE 120 -32 72 -32
WIRE 280 -32 120 -32
WIRE 824 -32 280 -32
WIRE 920 -32 824 -32
WIRE 1032 -32 920 -32
WIRE 1160 -32 1032 -32
WIRE 1320 -32 1160 -32
WIRE -200 0 -264 0
WIRE -56 0 -56 -32
WIRE 280 0 280 -32
WIRE 920 0 920 -32
WIRE 440 32 408 32
WIRE 824 32 824 -32
WIRE 824 32 792 32
WIRE 1032 80 1032 -32
WIRE 120 112 120 -32
WIRE 280 112 280 80
WIRE 440 112 280 112
WIRE 920 112 920 80
WIRE 920 112 792 112
WIRE 1160 112 1160 -32
WIRE 1320 112 1320 -32
WIRE 440 192 280 192
WIRE 1032 192 1032 160
WIRE 1032 192 792 192
WIRE -904 224 -904 160
WIRE -776 224 -776 160
WIRE 280 224 280 192
WIRE -1032 256 -1032 240
WIRE 408 272 408 32
WIRE 440 272 408 272
WIRE 824 272 792 272
WIRE -440 304 -440 160
WIRE -1032 352 -1032 336
WIRE -664 352 -664 160
WIRE -664 352 -1032 352
WIRE -648 352 -664 352
WIRE -552 352 -552 160
WIRE -552 352 -568 352
WIRE -456 352 -552 352
WIRE -328 352 -328 160
WIRE -328 352 -360 352
WIRE 8 352 -328 352
WIRE 120 352 120 176
WIRE 120 352 72 352
WIRE 280 352 280 304
WIRE 280 352 120 352
WIRE 408 352 408 272
WIRE 408 352 280 352
WIRE 440 352 408 352
WIRE 824 352 824 272
WIRE 824 352 792 352
WIRE 1160 352 1160 176
WIRE 1160 352 824 352
WIRE 1320 352 1320 192
WIRE 1320 352 1160 352
FLAG -56 0 0
FLAG -904 224 0
FLAG -776 224 0
FLAG -1320 -48 0
FLAG -664 -368 0
FLAG -200 -128 Status
FLAG -200 0 Class
FLAG -1032 240 0
SYMBOL res 264 208 R0
SYMATTR InstName Rclass
SYMATTR Value 30.9
SYMBOL res 904 -16 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res 1016 64 R0
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL res 264 -16 R0
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL cap 1144 112 R0
SYMATTR SpiceLine Rser=10m
SYMATTR InstName Cload
SYMATTR Value 100
SYMBOL cap 104 112 R0
SYMATTR SpiceLine Rser=10m
SYMATTR InstName C1
SYMATTR Value .22
SYMBOL diode 8 -48 M90
SYMATTR InstName D1
SYMATTR Value MURS120
SYMBOL diode 72 368 M270
SYMATTR InstName D2
SYMATTR Value MURS120
SYMBOL res 1304 96 R0
SYMATTR InstName Rload
SYMATTR Value 1.3K
SYMBOL LTC4265 616 192 R0
SYMATTR InstName U1
SYMBOL LTC4274 -664 -64 R0
SYMATTR InstName U2
SYMBOL voltage -1320 -160 R0
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL voltage -664 -256 M180
SYMATTR InstName V2
SYMATTR Value PWL(0 0 100u 3.3)
SYMBOL nmos -360 304 R90
SYMATTR InstName M1
SYMATTR Value BSH114
SYMBOL res -552 336 R90
SYMATTR InstName R4
SYMATTR Value .25
SYMBOL voltage -1032 240 R0
SYMATTR InstName V3
SYMATTR Value 56