* SPICE netlist
C1 N013 0 300p
R1 N010 N009 1K
C2 N009 0 3300p
MQ1 N003 N006 IN IN FDC638P
L1 N003 N004 27
R2 N004 +2.5 50m
R3 N011 N012 1K
C3 N012 0 3300p
C4 N014 0 300p
D1 0 N003 1N5818
Rload2 +2.5 0 2
MQ2 N002 N005 IN IN FDC638P
L2 N002 N001 27
R5 N001 +3.3 50m
Rload1 +3.3 0 5
V1 IN 0 5.75
C5 +2.5 0 220 Rser=.1 x2
D2 0 N002 1N5818
C6 N004 +2.5 1000p
C7 N001 +3.3 1000p
XU1 N001 N007 0 N005 IN N014 N011 +2.5 N004 N008 0 N006 IN N013 N010 +3.3 LTC1143L-ADJ ;pnba Sense+1)FB1)GND1)P-drive1)Vin2)Ct2)Ith2)Sense-2)Sense+2)FB2)GND2)P-drive2)Vin1)Ct1)Ith1)Sense-1
R7 +2.5 N008 49.9K
R8 N008 0 49.9K
R9 +3.3 N007 82.5K
R10 N007 0 49.9K
C8 +3.3 0 220 Rser=.1 x2
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1680 720
WIRE -40 -360 -840 -360
WIRE -840 -344 -840 -360
WIRE -616 -280 -728 -280
WIRE -600 -280 -616 -280
WIRE -504 -280 -520 -280
WIRE -488 -280 -504 -280
WIRE -360 -280 -408 -280
WIRE -312 -280 -360 -280
WIRE -40 -280 -40 -360
WIRE -40 -280 -216 -280
WIRE 216 -280 -40 -280
WIRE 360 -280 216 -280
WIRE 520 -280 456 -280
WIRE 552 -280 520 -280
WIRE 664 -280 632 -280
WIRE 680 -280 664 -280
WIRE 792 -280 760 -280
WIRE 840 -280 792 -280
WIRE -728 -264 -728 -280
WIRE 840 -264 840 -280
WIRE -840 -248 -840 -264
WIRE -360 -248 -360 -280
WIRE 520 -248 520 -280
WIRE -40 -216 -40 -280
WIRE 216 -216 216 -280
WIRE -728 -168 -728 -184
WIRE 520 -168 520 -184
WIRE 840 -168 840 -184
WIRE -360 -152 -360 -184
WIRE -232 -136 -232 -232
WIRE -168 -136 -232 -136
WIRE 376 -136 376 -232
WIRE 376 -136 344 -136
WIRE -504 -56 -504 -280
WIRE -248 -56 -504 -56
WIRE -168 -56 -248 -56
WIRE 392 -56 344 -56
WIRE 664 -56 664 -280
WIRE 664 -56 392 -56
WIRE -616 24 -616 -280
WIRE -488 24 -616 24
WIRE -248 24 -248 8
WIRE -248 24 -488 24
WIRE -168 24 -248 24
WIRE 392 24 392 8
WIRE 392 24 344 24
WIRE 600 24 392 24
WIRE 792 24 792 -280
WIRE 792 24 600 24
WIRE -616 40 -616 24
WIRE 792 40 792 24
WIRE -168 104 -488 104
WIRE 600 104 344 104
WIRE -616 120 -616 104
WIRE -488 120 -488 104
WIRE 600 120 600 104
WIRE 792 120 792 104
WIRE -344 184 -360 184
WIRE -264 184 -280 184
WIRE -168 184 -184 184
WIRE 360 184 344 184
WIRE 456 184 440 184
WIRE 536 184 520 184
WIRE -488 216 -488 200
WIRE 600 216 600 200
WIRE -104 280 -104 264
WIRE 24 280 24 264
WIRE 152 280 152 264
WIRE 280 280 280 264
WIRE 24 360 24 344
WIRE 152 360 152 344
FLAG 24 360 0
FLAG 280 280 0
FLAG 152 360 0
FLAG 536 184 0
FLAG -360 184 0
FLAG 520 -168 0
FLAG 792 120 0
FLAG 840 -168 0
FLAG -616 120 0
FLAG -728 -168 0
FLAG -840 -248 0
FLAG -104 280 0
FLAG 840 -280 +2.5
FLAG -728 -280 +3.3
FLAG -360 -152 0
FLAG 600 216 0
FLAG -488 216 0
FLAG -840 -360 IN
SYMBOL cap 8 280 R0
SYMATTR InstName C1
SYMATTR Value 300p
SYMBOL RES -168 168 R90
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL cap -280 168 R90
SYMATTR InstName C2
SYMATTR Value 3300p
SYMBOL PMOS 456 -232 M270
SYMATTR InstName Q1
SYMATTR Value FDC638P
SYMBOL ind 536 -264 R270
SYMATTR InstName L1
SYMATTR Value 27
SYMBOL res 664 -296 M90
SYMATTR InstName R2
SYMATTR Value 50m
SYMBOL res 344 200 R270
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL cap 456 200 R270
SYMATTR InstName C3
SYMATTR Value 3300p
SYMBOL cap 136 280 R0
SYMATTR InstName C4
SYMATTR Value 300p
SYMBOL schottky 504 -184 M180
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL res 824 -280 R0
SYMATTR InstName Rload2
SYMATTR Value 2
SYMBOL pmos -312 -232 R270
SYMATTR InstName Q2
SYMATTR Value FDC638P
SYMBOL ind -392 -264 M270
SYMATTR InstName L2
SYMATTR Value 27
SYMBOL res -504 -296 R90
SYMATTR InstName R5
SYMATTR Value 50m
SYMBOL res -744 -280 R0
SYMATTR InstName Rload1
SYMATTR Value 5
SYMBOL VOLTAGE -840 -360 R0
SYMATTR InstName V1
SYMATTR Value 5.75
SYMBOL polcap 776 40 R0
SYMATTR SpiceLine2 x2
SYMATTR Value 220
SYMATTR SpiceLine Rser=.1
SYMATTR InstName C5
SYMBOL schottky -376 -184 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL cap 376 -56 R0
SYMATTR InstName C6
SYMATTR Value 1000p
SYMBOL cap -264 -56 R0
SYMATTR InstName C7
SYMATTR Value 1000p
SYMBOL POWERPRODUCTS\\LTC1143L-ADJ 88 24 R0
SYMATTR InstName U1
SYMBOL res 584 8 R0
SYMATTR InstName R7
SYMATTR Value 49.9K
SYMBOL res 584 104 R0
SYMATTR InstName R8
SYMATTR Value 49.9K
SYMBOL res -504 8 R0
SYMATTR InstName R9
SYMATTR Value 82.5K
SYMBOL res -504 104 R0
SYMATTR InstName R10
SYMATTR Value 49.9K
SYMBOL polcap -632 40 R0
SYMATTR SpiceLine2 x2
SYMATTR SpiceLine Rser=.1
SYMATTR InstName C8
SYMATTR Value 220