* SPICE netlist
V1 IN 0 48
MQ1 N006 N012 0 0 FDS5690
MQ2 N006 N002 IN IN IRF7343P
C1 N004 0 470p
C2 N009 0 3300p
C3 N003 0 3.3
C4 N001 N003 .068
D1 N001 IN 1N4148
D2 N002 IN 1N4148
L1 N006 N007 62
C5 N007 OUT 1000p
C6 N002 N005 .047
D3 0 N006 MBRS360
C7 OUT 0 220 Rser=.01
R1 N010 N009 1K
R2 N007 OUT 50m
XU1 N002 IN N003 N005 MP_01 N011 N010 OUT N007 N004 0 0 N012 0 N008 N001 LTC1149-3.3 ;pnba P-Gate)Vin)Vcc)P-Drive))Ct)Ith)Sense-)Sense+)SHDN1)SGND)PGND)N-Gate)RGND)SHDN2)CAP
C8 N011 0 100p
Rload OUT 0 3
.tran 9m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1200 560
WIRE -264 -280 -584 -280
WIRE -200 -280 -264 -280
WIRE -72 -280 -136 -280
WIRE 88 -280 -72 -280
WIRE 280 -280 88 -280
WIRE 456 -280 280 -280
WIRE 456 -264 456 -280
WIRE -584 -232 -584 -280
WIRE 88 -232 88 -280
WIRE -264 -184 -264 -280
WIRE -72 -184 -72 -280
WIRE 280 -184 280 -280
WIRE 232 -168 200 -168
WIRE 456 -168 456 -184
WIRE -584 -120 -584 -168
WIRE -376 -120 -584 -120
WIRE 88 -120 88 -168
WIRE 88 -120 40 -120
WIRE 200 -120 200 -168
WIRE 200 -120 88 -120
WIRE 88 -104 88 -120
WIRE -584 -88 -584 -120
WIRE -472 -40 -488 -40
WIRE -376 -40 -408 -40
WIRE 88 -40 40 -40
WIRE 280 -40 280 -88
WIRE 312 -40 280 -40
WIRE 408 -40 392 -40
WIRE 424 -40 408 -40
WIRE 520 -40 504 -40
WIRE 600 -40 520 -40
WIRE 600 -24 600 -40
WIRE -584 -8 -584 -24
WIRE -376 40 -408 40
WIRE 88 40 40 40
WIRE 408 40 408 -40
WIRE 408 40 88 40
WIRE 600 72 600 56
WIRE -552 120 -568 120
WIRE -472 120 -488 120
WIRE -376 120 -392 120
WIRE 88 120 88 104
WIRE 88 120 40 120
WIRE 520 120 520 -40
WIRE 520 120 88 120
WIRE 520 136 520 120
WIRE 280 152 280 -40
WIRE 344 152 280 152
WIRE 280 168 280 152
WIRE 344 184 344 152
WIRE -488 200 -504 200
WIRE -376 200 -424 200
WIRE 200 200 40 200
WIRE 520 216 520 200
WIRE 200 248 200 200
WIRE 232 248 200 248
WIRE -296 280 -296 264
WIRE -168 280 -168 264
WIRE -40 280 -40 264
WIRE 280 280 280 264
WIRE 344 280 344 248
FLAG 456 -168 0
FLAG 280 280 0
FLAG -40 280 0
FLAG -168 280 0
FLAG -296 280 0
FLAG -488 -40 0
FLAG -568 120 0
FLAG -584 -8 0
FLAG 344 280 0
FLAG 520 216 0
FLAG 600 72 0
FLAG 600 -40 OUT
FLAG -504 200 0
FLAG 456 -280 IN
SYMBOL VOLTAGE 456 -280 R0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL NMOS 232 168 R0
SYMATTR InstName Q1
SYMATTR Value FDS5690
SYMBOL PMOS 232 -88 M180
SYMATTR InstName Q2
SYMATTR Value IRF7343P
SYMBOL cap -408 -56 R90
SYMATTR InstName C1
SYMATTR Value 470p
SYMBOL cap -488 104 R90
SYMATTR InstName C2
SYMATTR Value 3300p
SYMBOL polcap -600 -88 R0
SYMATTR Value 3.3
SYMATTR InstName C3
SYMBOL cap -600 -232 R0
SYMATTR InstName C4
SYMATTR Value .068
SYMBOL diode -200 -264 R270
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 72 -168 M180
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL ind 296 -24 R270
SYMATTR InstName L1
SYMATTR Value 62
SYMBOL cap 72 40 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL cap 72 -104 R0
SYMATTR InstName C6
SYMATTR Value .047
SYMBOL schottky 328 248 M180
SYMATTR InstName D3
SYMATTR Value MBRS360
SYMBOL polcap 504 136 R0
SYMATTR InstName C7
SYMATTR Value 220
SYMATTR SpiceLine Rser=.01
SYMBOL RES -376 104 R90
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL res 408 -24 R270
SYMATTR InstName R2
SYMATTR Value 50m
SYMBOL PowerProducts\\LTC1149-3.3 -168 40 R0
SYMATTR InstName U1
SYMBOL cap -424 184 R90
SYMATTR InstName C8
SYMATTR Value 100p
SYMBOL res 584 -40 R0
SYMATTR InstName Rload
SYMATTR Value 3