* SPICE netlist
XU1 N002 N003 N001 0 N004 N005 OUT- OUT+ LT4250L ;pnba _PWRGD)OV)UV)Vee)Sense)Gate)Drain)Vdd
R1 N006 N005 1K
C4 OUT- N006 15n
R5 N005 N008 10
C2 N005 N004 470n
M1 OUT- N008 N004 N004 IRF530
R6 N004 0 20m
R3 N001 N003 6.49K
R4 OUT+ N001 549K
C1 N001 0 0.1
R7 N003 0 10K
V1 0 OUT+ PWL(0 0 10m -48 220m -48 220.1m -70)
C3 OUT+ OUT- 100 Rser=25m
V3 N007 OUT- PWL(0 0 360m 0 360.001m 1)
S2 OUT- OUT+ N007 OUT- SoftShort
Sload OUT- OUT+ N002 OUT- Load
R2 N002 OUT+ 100K
.tran 400m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2128 704
WIRE -328 -352 -1064 -352
WIRE 40 -352 -328 -352
WIRE 408 -352 40 -352
WIRE 824 -352 408 -352
WIRE -328 -336 -328 -352
WIRE 40 -304 40 -352
WIRE 408 -304 408 -352
WIRE -328 -240 -328 -256
WIRE -328 -240 -440 -240
WIRE -216 -240 -328 -240
WIRE -328 -208 -328 -240
WIRE 408 -160 408 -224
WIRE 408 -160 328 -160
WIRE 1064 -160 408 -160
WIRE -328 -80 -328 -128
WIRE -216 -80 -328 -80
WIRE -1064 -64 -1064 -352
WIRE 264 16 264 0
WIRE 312 16 264 16
WIRE -440 32 -440 -240
WIRE -328 32 -328 -80
WIRE -24 80 -24 0
WIRE 40 80 -24 80
WIRE 120 80 120 0
WIRE 120 80 104 80
WIRE 136 80 120 80
WIRE 232 80 216 80
WIRE 312 80 312 16
WIRE 312 80 296 80
WIRE 824 96 824 -352
WIRE 824 96 664 96
WIRE 904 96 824 96
WIRE 1016 96 904 96
WIRE 1016 128 1016 96
WIRE 120 144 120 80
WIRE 664 144 664 96
WIRE 824 144 824 96
WIRE 1064 144 1064 -160
WIRE 616 160 376 160
WIRE 376 208 376 160
WIRE 616 256 616 208
WIRE 664 256 664 224
WIRE 664 256 616 256
WIRE 824 256 824 208
WIRE 824 256 664 256
WIRE 904 256 824 256
WIRE 1016 256 1016 208
WIRE 1016 256 904 256
WIRE 1064 256 1064 192
WIRE 1064 256 1016 256
WIRE 120 272 120 224
WIRE -1064 320 -1064 16
WIRE -440 320 -440 96
WIRE -440 320 -1064 320
WIRE -328 320 -328 112
WIRE -328 320 -440 320
WIRE -168 320 -168 0
WIRE -168 320 -328 320
WIRE -120 320 -168 320
WIRE -24 320 -24 80
WIRE -24 320 -40 320
WIRE 104 320 -24 320
WIRE 312 320 312 80
WIRE 312 320 200 320
WIRE 376 320 376 288
WIRE 376 320 312 320
WIRE 824 320 824 256
WIRE 824 320 376 320
WIRE -168 352 -168 320
FLAG -168 352 0
FLAG -1064 -352 IN
FLAG 904 96 OUT+
FLAG 904 256 OUT-
SYMBOL LT4250L 40 -160 R0
SYMATTR InstName U1
SYMBOL res 232 64 R90
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL cap 296 64 R90
SYMATTR InstName C4
SYMATTR Value 15n
SYMBOL res 104 128 R0
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL cap 104 64 R90
SYMATTR InstName C2
SYMATTR Value 470n
SYMBOL nmos 200 272 R90
SYMATTR InstName M1
SYMATTR Value IRF530
SYMBOL res -24 304 R90
SYMATTR InstName R6
SYMATTR Value 20m
SYMBOL res -344 -224 R0
SYMATTR InstName R3
SYMATTR Value 6.49K
SYMBOL res -344 -352 R0
SYMATTR InstName R4
SYMATTR Value 549K
SYMBOL cap -456 32 R0
SYMATTR InstName C1
SYMATTR Value 0.1
SYMBOL res -344 16 R0
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL voltage -1064 32 M180
SYMATTR Value PWL(0 0 10m -48 220m -48 220.1m -70)
SYMATTR InstName V1
SYMBOL cap 808 144 R0
SYMATTR InstName C3
SYMATTR Value 100
SYMATTR SpiceLine Rser=25m
SYMBOL voltage 376 192 R0
SYMATTR InstName V3
SYMATTR Value PWL(0 0 360m 0 360.001m 1)
SYMBOL sw 664 240 M180
SYMATTR InstName S2
SYMATTR Value SoftShort
SYMBOL sw 1016 224 R180
SYMATTR InstName Sload
SYMATTR Value Load
SYMBOL res 392 -208 M180
SYMATTR InstName R2
SYMATTR Value 100K