* SPICE netlist
XU1 IN 0 0 0 N008 N007 MP_01 N010 N013 N016 N012 N014 N011 IN 0 N006 N006 N005 N002 N001 LT1681 ;pnba _SHDN)OVLO)TERM)GSND)5Vref)FSET))SS)FB)Vc)Sense)Imax)SG)Vcc)PGND)GB)BLKSENS)BSTREF)TG)Vbst
MQ1 IN N002 N005 N005 IRF7303
MQ2 N009 N006 N012 N012 IRF7303
V1 IN 0 16
R1 N012 0 25m
C1 N010 0 .001
C2 N016 N015 .001
R2 N015 N013 100
R3 N013 0 1K
R4 N013 OUT 1K
C3 N007 0 150p
R5 N008 N007 52.3K
L1 N005 N009 300
L2 N003 0 300
D1 0 N004 MBRS360
L3 N004 OUT 10
C4 OUT 0 100 Rser=50m
Rload OUT 0 .5
C5 N005 N001 .5
D2 N003 N004 MBRS360
D3 IN N001 1N5817
K1 L1 L2 1.
.tran 500u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1440 560
WIRE -432 -280 -528 -280
WIRE -64 -280 -432 -280
WIRE -32 -280 -64 -280
WIRE 208 -280 -32 -280
WIRE -528 -264 -528 -280
WIRE 208 -248 208 -280
WIRE -432 -216 -432 -280
WIRE -400 -216 -432 -216
WIRE -32 -216 -112 -216
WIRE 32 -216 -32 -216
WIRE -528 -168 -528 -184
WIRE -400 -168 -416 -168
WIRE 160 -168 -112 -168
WIRE 320 -136 256 -136
WIRE 432 -136 384 -136
WIRE 448 -136 432 -136
WIRE 576 -136 528 -136
WIRE 624 -136 576 -136
WIRE 720 -136 624 -136
WIRE -400 -120 -416 -120
WIRE 96 -120 96 -216
WIRE 96 -120 -112 -120
WIRE 208 -120 208 -152
WIRE 208 -120 96 -120
WIRE 624 -120 624 -136
WIRE 720 -120 720 -136
WIRE 208 -104 208 -120
WIRE 256 -104 256 -136
WIRE 432 -88 432 -136
WIRE -400 -72 -416 -72
WIRE -96 -72 -112 -72
WIRE -512 -24 -544 -24
WIRE -400 -24 -432 -24
WIRE -96 -24 -96 -72
WIRE -96 -24 -112 -24
WIRE 64 -24 -96 -24
WIRE 624 -24 624 -56
WIRE 720 -24 720 -40
WIRE 208 -8 208 -24
WIRE 256 8 256 -24
WIRE 432 8 432 -24
WIRE -640 24 -672 24
WIRE -544 24 -544 -24
WIRE -544 24 -576 24
WIRE -400 24 -544 24
WIRE -96 24 -112 24
WIRE -64 72 -64 -280
WIRE -64 72 -112 72
WIRE 64 72 64 -24
WIRE 160 72 64 72
WIRE -496 120 -512 120
WIRE -400 120 -432 120
WIRE -96 120 -112 120
WIRE 208 120 208 88
WIRE 208 120 144 120
WIRE 208 136 208 120
WIRE 576 152 576 -136
WIRE -704 168 -720 168
WIRE -608 168 -624 168
WIRE -400 168 -608 168
WIRE -96 168 -112 168
WIRE -608 216 -608 168
WIRE -592 216 -608 216
WIRE -480 216 -512 216
WIRE -400 216 -416 216
WIRE 144 216 144 120
WIRE 144 216 -112 216
WIRE 208 232 208 216
WIRE -608 280 -608 216
WIRE 576 280 576 232
WIRE 576 280 -608 280
FLAG -96 24 0
FLAG 208 232 0
FLAG -416 -72 0
FLAG -416 -120 0
FLAG -416 -168 0
FLAG -512 120 0
FLAG -672 24 0
FLAG -528 -168 0
FLAG 624 -24 0
FLAG -720 168 0
FLAG 720 -24 0
FLAG 256 8 0
FLAG 432 8 0
FLAG 720 -136 OUT
FLAG -528 -280 IN
SYMBOL PowerProducts\\LT1681 -256 -8 R0
SYMATTR InstName U1
SYMBOL nmos 160 -248 R0
SYMATTR InstName Q1
SYMATTR Value IRF7303
SYMBOL nmos 160 -8 R0
SYMATTR InstName Q2
SYMATTR Value IRF7303
SYMBOL voltage -528 -280 R0
SYMATTR InstName V1
SYMATTR Value 16
SYMBOL res 192 120 R0
SYMATTR InstName R1
SYMATTR Value 25m
SYMBOL cap -432 104 R90
SYMATTR InstName C1
SYMATTR Value .001
SYMBOL cap -416 200 R90
SYMATTR InstName C2
SYMATTR Value .001
SYMBOL res -496 200 R90
SYMATTR InstName R2
SYMATTR Value 100
SYMBOL res -608 152 R90
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL res 560 248 M180
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL cap -576 8 R90
SYMATTR InstName C3
SYMATTR Value 150p
SYMBOL res -416 -40 R90
SYMATTR InstName R5
SYMATTR Value 52.3K
SYMBOL ind2 192 -120 R0
SYMATTR InstName L1
SYMATTR Value 300
SYMATTR Type ind
SYMBOL ind2 272 -120 M0
SYMATTR InstName L2
SYMATTR Value 300
SYMATTR Type ind
SYMBOL schottky 416 -24 M180
SYMATTR InstName D1
SYMATTR Value MBRS360
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind 432 -120 R270
SYMATTR InstName L3
SYMATTR Value 10
SYMBOL cap 608 -120 R0
SYMATTR InstName C4
SYMATTR Value 100
SYMATTR SpiceLine Rser=50m
SYMBOL res 704 -136 R0
SYMATTR InstName Rload
SYMATTR Value .5
SYMBOL cap 96 -232 R90
SYMATTR InstName C5
SYMATTR Value .5
SYMBOL schottky 320 -120 R270
SYMATTR InstName D2
SYMATTR Value MBRS360
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -48 -280 R0
SYMATTR InstName D3
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode