* SPICE netlist
XU1 N011 N004 N007 0 0 N019 MP_01 N009 N012 N015 N014 N018 N017 N006 N010 LTC3721-1 ;pnba DRVB)Vcc)DRVA)PGND)SGND)Ct))Dprg)CS)COMP)Rleb)FB)SS)UVLO)Vref
MQ1 N001 N007 N013 N013 IRF7201
MQ2 N005 N011 N013 N013 IRF7201
R1 N013 0 75m
R2 N013 N012 100
C1 N019 0 270p
R3 N010 N009 100K
R4 N014 0 100K
C2 N017 0 .1
V1 IN 0 12
L1 N001 IN .5m
L2 IN N005 .5m
L3 N002 N003 .5m
L4 N002 OUT 20
L5 N003 OUT 20
D1 0 N002 1N5817
D2 0 N003 1N5817
R5 OUT N018 15.8K
R6 N018 0 5K
C3 N018 N016 .001
R7 N016 N015 50K
C4 OUT 0 100
Q3 IN N008 N004 0 2N3904
R8 IN N004 2K
R9 IN N008 2K
C5 0 N004 1
D3 0 N008 MMBZ10VALY
Rload OUT 0 10
R10 IN N006 107K
R11 N006 0 100K
C6 N006 0 .001
K1 L1 L2 L3 1
.tran 8m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1824 672
WIRE 464 -336 320 -336
WIRE 464 -320 464 -336
WIRE 592 -288 512 -288
WIRE 656 -288 592 -288
WIRE 768 -288 736 -288
WIRE 816 -288 768 -288
WIRE 912 -288 816 -288
WIRE 512 -272 512 -288
WIRE 592 -272 592 -288
WIRE 816 -272 816 -288
WIRE 912 -272 912 -288
WIRE -816 -224 -912 -224
WIRE -752 -224 -816 -224
WIRE -480 -224 -752 -224
WIRE 0 -224 -480 -224
WIRE 464 -224 464 -240
WIRE 464 -224 0 -224
WIRE -912 -208 -912 -224
WIRE -480 -208 -480 -224
WIRE 0 -208 0 -224
WIRE 464 -208 464 -224
WIRE 512 -176 512 -192
WIRE 592 -176 512 -176
WIRE 656 -176 592 -176
WIRE 768 -176 768 -288
WIRE 768 -176 736 -176
WIRE 816 -176 816 -208
WIRE 912 -176 912 -192
WIRE 592 -160 592 -176
WIRE 320 -128 320 -336
WIRE -912 -112 -912 -128
WIRE -752 -112 -752 -224
WIRE -736 -112 -752 -112
WIRE -544 -112 -640 -112
WIRE 0 -112 0 -128
WIRE 0 -112 -544 -112
WIRE -544 -96 -544 -112
WIRE 0 -96 0 -112
WIRE 464 -64 464 -128
WIRE -480 -48 -480 -128
WIRE -384 -48 -480 -48
WIRE -176 -48 -384 -48
WIRE 272 -48 160 -48
WIRE -816 -32 -816 -224
WIRE -800 -32 -816 -32
WIRE -688 -32 -688 -48
WIRE -688 -32 -720 -32
WIRE -480 -32 -480 -48
WIRE -384 -32 -384 -48
WIRE -688 -16 -688 -32
WIRE -544 -16 -544 -32
WIRE -272 16 -304 16
WIRE -176 16 -192 16
WIRE 416 16 160 16
WIRE -688 64 -688 48
WIRE -480 64 -480 48
WIRE -384 64 -384 32
WIRE -304 80 -304 16
WIRE -176 80 -304 80
WIRE 224 80 160 80
WIRE 320 80 320 -32
WIRE 320 80 304 80
WIRE 464 80 464 32
WIRE 464 80 320 80
WIRE 480 80 464 80
WIRE 576 80 560 80
WIRE 768 112 768 -176
WIRE -272 144 -288 144
WIRE -176 144 -192 144
WIRE 176 144 160 144
WIRE 272 144 256 144
WIRE -176 208 -240 208
WIRE 272 208 160 208
WIRE 768 208 768 192
WIRE 768 208 272 208
WIRE -240 224 -240 208
WIRE 768 224 768 208
WIRE -96 272 -96 256
WIRE 0 272 0 256
WIRE 96 272 96 256
WIRE -240 304 -240 288
WIRE 768 320 768 304
FLAG 576 80 0
FLAG -96 336 0
FLAG 0 272 0
FLAG 96 272 0
FLAG -288 144 0
FLAG -240 304 0
FLAG -912 -112 0
FLAG 592 -96 0
FLAG 592 -208 0
FLAG 768 320 0
FLAG 912 -176 0
FLAG 816 -176 0
FLAG 912 -288 OUT
FLAG -912 -224 IN
FLAG -544 -16 0
FLAG -480 64 0
FLAG -384 64 0
FLAG -688 64 0
SYMBOL LTC3721-1 0 80 R0
SYMATTR InstName U1
SYMBOL nmos 272 -128 R0
SYMATTR InstName Q1
SYMATTR Value IRF7201
SYMBOL nmos 416 -64 R0
SYMATTR Value IRF7201
SYMATTR InstName Q2
SYMBOL res 464 96 R270
SYMATTR InstName R1
SYMATTR Value 75m
SYMBOL res 320 64 R90
SYMATTR InstName R2
SYMATTR Value 100
SYMBOL cap -112 272 R0
SYMATTR Value 270p
SYMATTR InstName C1
SYMBOL res -176 0 R90
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL res -176 128 R90
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL cap -256 224 R0
SYMATTR Value .1
SYMATTR InstName C2
SYMBOL voltage -912 -224 R0
SYMATTR Value 12
SYMATTR InstName V1
SYMBOL ind2 448 -336 R0
SYMATTR InstName L1
SYMATTR Value .5m
SYMATTR Type ind
SYMBOL ind2 448 -224 R0
SYMATTR InstName L2
SYMATTR Value .5m
SYMATTR Type ind
SYMBOL ind2 528 -288 M0
SYMATTR InstName L3
SYMATTR Value .5m
SYMATTR Type ind
SYMBOL ind 640 -272 R270
SYMATTR InstName L4
SYMATTR Value 20
SYMBOL ind 640 -160 R270
SYMATTR InstName L5
SYMATTR Value 20
SYMBOL schottky 576 -208 M180
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 576 -96 M180
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 752 96 R0
SYMATTR InstName R5
SYMATTR Value 15.8K
SYMBOL res 752 208 R0
SYMATTR InstName R6
SYMATTR Value 5K
SYMBOL cap 256 208 M180
SYMATTR InstName C3
SYMATTR Value .001
SYMBOL res 272 128 R90
SYMATTR InstName R7
SYMATTR Value 50K
SYMBOL cap 800 -272 R0
SYMATTR InstName C4
SYMATTR Value 100
SYMBOL npn -736 -48 R270
SYMATTR InstName Q3
SYMATTR Value 2N3904
SYMBOL res -16 -224 R0
SYMATTR InstName R8
SYMATTR Value 2K
SYMBOL res -816 -16 R270
SYMATTR InstName R9
SYMATTR Value 2K
SYMBOL cap -560 -32 M180
SYMATTR InstName C5
SYMATTR Value 1
SYMBOL zener -704 48 M180
SYMATTR InstName D3
SYMATTR Value MMBZ10VALY
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 896 -288 R0
SYMATTR InstName Rload
SYMATTR Value 10
SYMBOL res -496 -224 R0
SYMATTR InstName R10
SYMATTR Value 107K
SYMBOL res -496 -48 R0
SYMATTR InstName R11
SYMATTR Value 100K
SYMBOL cap -400 -32 R0
SYMATTR InstName C6
SYMATTR Value .001