* SPICE netlist
XU1 N016 N010 N003 N013 N002 N011 N002 N007 N004 N017 N005 N009 N006 N014 N015 N008 0 LTC3643 ;pnba FBCAP)PFI)Vin)FBSYS)CPL)Ith)Run)Gate)INDIS)Ilimit)SW)INTVcc)Boost)CAP)CAPGD)PFO)GND
R1 N002 N003 10m
L1 N004 N005 4.7
C1 N006 N005 .1
MQ1 N001 N007 N002 N002 Si4427DY
C2 N003 0 47
C3 0 N009 4.7
R2 N014 N016 392K
R3 N016 0 6.04K
C4 N014 0 2
R4 N012 N011 400K
C5 0 N012 470p
R5 N002 N013 44.2K
R6 N013 0 6.04K
R7 N001 N010 35.7K
R8 N010 0 12.1K
Rload N003 0 20
R10 N003 N015 20K
R11 N003 N008 20K
V1 N001 0 PWL(0 0 1u 5 1m 5 +20u 0)
.tran 5m

* LTspice schematic (.asc)
Version 4
SHEET 1 1712 752
WIRE -456 -376 -856 -376
WIRE -408 -376 -456 -376
WIRE -296 -376 -312 -376
WIRE -136 -376 -296 -376
WIRE -120 -376 -136 -376
WIRE -24 -376 -40 -376
WIRE 472 -376 -24 -376
WIRE 648 -376 472 -376
WIRE 760 -376 648 -376
WIRE 856 -376 760 -376
WIRE -856 -360 -856 -376
WIRE 760 -360 760 -376
WIRE 856 -360 856 -376
WIRE 104 -328 88 -328
WIRE 200 -328 184 -328
WIRE 232 -328 200 -328
WIRE 328 -328 296 -328
WIRE 472 -296 472 -376
WIRE 648 -296 648 -376
WIRE -136 -280 -136 -376
WIRE -24 -280 -24 -376
WIRE 88 -280 88 -328
WIRE 200 -280 200 -328
WIRE 328 -280 328 -328
WIRE -856 -264 -856 -280
WIRE 760 -264 760 -296
WIRE 856 -264 856 -280
WIRE -328 -216 -328 -328
WIRE -200 -216 -328 -216
WIRE 472 -200 472 -216
WIRE 472 -200 392 -200
WIRE -296 -104 -296 -376
WIRE -200 -104 -296 -104
WIRE 408 -104 392 -104
WIRE 488 -104 472 -104
WIRE -456 -88 -456 -376
WIRE -456 8 -456 -8
WIRE -200 8 -456 8
WIRE 408 8 392 8
WIRE 504 8 488 8
WIRE 584 8 568 8
WIRE -456 24 -456 8
WIRE -296 24 -296 -104
WIRE -456 120 -456 104
WIRE -296 120 -296 104
WIRE -200 120 -296 120
WIRE 472 120 392 120
WIRE 584 120 472 120
WIRE -296 136 -296 120
WIRE 472 136 472 120
WIRE 584 136 584 120
WIRE -296 232 -296 216
WIRE -200 232 -232 232
WIRE 472 232 472 216
WIRE 472 232 392 232
WIRE 584 232 584 200
WIRE 472 248 472 232
WIRE -24 312 -24 296
WIRE 200 312 200 296
WIRE 472 344 472 328
WIRE -232 376 -232 232
WIRE 648 376 648 -216
WIRE 648 376 -232 376
FLAG -856 -264 0
FLAG 856 -264 0
FLAG 760 -264 0
FLAG 488 -104 0
FLAG 584 232 0
FLAG 472 344 0
FLAG 584 8 0
FLAG 200 312 0
FLAG -296 232 0
FLAG -456 120 0
SYMBOL PowerProducts\\LTC3643 88 8 R0
SYMATTR InstName U1
SYMBOL res -136 -360 R270
SYMATTR InstName R1
SYMATTR Value 10m
SYMBOL ind 88 -312 R270
SYMATTR InstName L1
SYMATTR Value 4.7
SYMBOL cap 296 -344 R90
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL pmos -408 -328 R270
SYMATTR InstName Q1
SYMATTR Value Si4427DY
SYMBOL cap 744 -360 R0
SYMATTR InstName C2
SYMATTR Value 47
SYMBOL cap 472 -120 R90
SYMATTR InstName C3
SYMATTR Value 4.7
SYMBOL res 456 120 R0
SYMATTR InstName R2
SYMATTR Value 392K
SYMBOL res 456 232 R0
SYMATTR InstName R3
SYMATTR Value 6.04K
SYMBOL cap 568 136 R0
SYMATTR InstName C4
SYMATTR Value 2
SYMBOL res 504 -8 R90
SYMATTR InstName R4
SYMATTR Value 400K
SYMBOL cap 568 -8 R90
SYMATTR InstName C5
SYMATTR Value 470p
SYMBOL res -312 8 R0
SYMATTR InstName R5
SYMATTR Value 44.2K
SYMBOL res -312 120 R0
SYMATTR InstName R6
SYMATTR Value 6.04K
SYMBOL res -472 -104 R0
SYMATTR InstName R7
SYMATTR Value 35.7K
SYMBOL res -472 8 R0
SYMATTR InstName R8
SYMATTR Value 12.1K
SYMBOL res 840 -376 R0
SYMATTR InstName Rload
SYMATTR Value 20
SYMBOL res 632 -312 R0
SYMATTR InstName R10
SYMATTR Value 20K
SYMBOL res 456 -312 R0
SYMATTR InstName R11
SYMATTR Value 20K
SYMBOL voltage -856 -376 R0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 1u 5 1m 5 +20u 0)