* SPICE netlist
V1 IN 0 48
MQ1 N005 N012 0 0 FDS5690
MQ2 N005 N002 IN IN IRF7343P
C1 N010 0 470p
C2 N008 0 3300p
R1 N009 N008 1K
C3 N003 0 3.3
C4 N001 N003 .15
D1 N002 IN 1N4148
L1 N005 N006 33
R2 N006 OUT 50m
C5 N006 OUT 1000p
C6 N002 N004 .1
D2 0 N005 MBRS360
C7 OUT 0 220 Rser=.01
XU1 N002 IN N003 N004 MP_01 N010 N009 OUT N006 N011 0 0 N012 OUT N007 N001 LTC1159 ;pnba P-Gate)Vin)Vcc)P-Drive))Ct)Ith)Sense-)Sense+)FB)SGND)PGND)N-Gate)EXTVcc)SHDN2)CAP
R3 OUT N011 164K
R4 N011 0 100K
Rload OUT 0 5
.tran 42m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1328 640
WIRE -264 -320 -664 -320
WIRE -8 -320 -264 -320
WIRE 152 -320 -8 -320
WIRE -664 -304 -664 -320
WIRE -8 -304 -8 -320
WIRE -264 -288 -264 -320
WIRE 152 -224 152 -320
WIRE -664 -208 -664 -224
WIRE -472 -208 -584 -208
WIRE -8 -208 -8 -240
WIRE -8 -208 -56 -208
WIRE 104 -208 -8 -208
WIRE -584 -128 -584 -144
WIRE -472 -128 -584 -128
WIRE -8 -128 -8 -144
WIRE -8 -128 -56 -128
WIRE -584 -112 -584 -128
WIRE 152 -96 152 -128
WIRE 200 -96 152 -96
WIRE 312 -96 280 -96
WIRE 344 -96 312 -96
WIRE 456 -96 424 -96
WIRE -472 -48 -488 -48
WIRE -8 -48 -56 -48
WIRE 312 -48 312 -96
WIRE 312 -48 -8 -48
WIRE -584 -32 -584 -48
WIRE -648 32 -664 32
WIRE -568 32 -584 32
WIRE -472 32 -488 32
WIRE -8 32 -8 16
WIRE -8 32 -56 32
WIRE 456 32 456 -96
WIRE 456 32 -8 32
WIRE 568 32 456 32
WIRE 664 32 568 32
WIRE 456 48 456 32
WIRE 568 48 568 32
WIRE 664 48 664 32
WIRE 152 96 152 -96
WIRE 280 96 152 96
WIRE -600 112 -664 112
WIRE -472 112 -536 112
WIRE -8 112 -8 32
WIRE -8 112 -56 112
WIRE 152 112 152 96
WIRE 280 128 280 96
WIRE 456 144 456 128
WIRE 456 144 408 144
WIRE 568 144 568 112
WIRE 664 144 664 128
WIRE 456 160 456 144
WIRE -472 192 -520 192
WIRE 104 192 -56 192
WIRE 152 224 152 208
WIRE 280 224 280 192
WIRE 456 256 456 240
WIRE -392 288 -392 272
WIRE -136 288 -136 272
WIRE -520 320 -520 192
WIRE 408 320 408 144
WIRE 408 320 -520 320
FLAG -664 -208 0
FLAG 152 224 0
FLAG -136 288 0
FLAG -392 288 0
FLAG -664 112 0
FLAG -664 32 0
FLAG -584 -32 0
FLAG 280 224 0
FLAG 568 144 0
FLAG 664 144 0
FLAG 664 32 OUT
FLAG 456 256 0
FLAG -664 -320 IN
SYMBOL VOLTAGE -664 -320 R0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL NMOS 104 112 R0
SYMATTR InstName Q1
SYMATTR Value FDS5690
SYMBOL PMOS 104 -128 M180
SYMATTR InstName Q2
SYMATTR Value IRF7343P
SYMBOL cap -536 96 R90
SYMATTR InstName C1
SYMATTR Value 470p
SYMBOL cap -584 16 R90
SYMATTR InstName C2
SYMATTR Value 3300p
SYMBOL RES -472 16 R90
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL polcap -600 -112 R0
SYMATTR Value 3.3
SYMATTR InstName C3
SYMBOL cap -600 -208 R0
SYMATTR InstName C4
SYMATTR Value .15
SYMBOL diode -24 -240 M180
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL ind 184 -80 R270
SYMATTR InstName L1
SYMATTR Value 33
SYMBOL res 328 -80 R270
SYMATTR InstName R2
SYMATTR Value 50m
SYMBOL cap -24 -48 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL cap -24 -208 R0
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL schottky 264 192 M180
SYMATTR InstName D2
SYMATTR Value MBRS360
SYMBOL polcap 552 48 R0
SYMATTR InstName C7
SYMATTR Value 220
SYMATTR SpiceLine Rser=.01
SYMBOL POWERPRODUCTS\\LTC1159 -264 -48 R0
SYMATTR InstName U1
SYMBOL res 440 32 R0
SYMATTR InstName R3
SYMATTR Value 164K
SYMBOL res 440 144 R0
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL res 648 32 R0
SYMATTR InstName Rload
SYMATTR Value 5