* SPICE netlist
R1 N012 N011 1K
C1 N011 0 3300p
C2 N016 0 390p
C3 N015 0 590p
R2 N013 N014 1K
C4 N014 0 3300p
MQ1 N007 N010 0 0 FDS6680A
C5 N008 +5 1000p
L1 N007 N008 50
R3 N008 +5 50m
C6 +5 0 220 Rser=0.1 x2
D1 0 N007 1N5818
MQ2 N006 N009 0 0 FDS6680A
MQ3 N006 N001 IN IN FDC638P
L2 N006 N005 50
R4 N005 +3.3 50m
D2 0 N006 1N5818
C7 N005 +3.3 1000p
Rload2 +5 0 10
Rload1 +3.3 0 10
V1 IN 0 10
MQ4 N007 N004 IN IN FDC638P
XU1 N005 N002 0 0 MP_01 N009 MP_02 MP_03 N004 IN N016 MP_04 N013 +5 N008 N003 0 0 MP_05 N010 MP_06 MP_07 N001 IN N015 MP_08 N012 +3.3 LTC1142 ;pnba Sense+3)SHDN3)SGND3)PGND3))N-drive3)))P-drive5)Vin5)Ct5))Ith5)Sense-5)Sense+5)SHDN5)SGND5)PGND5))N-drive5)))P-drive3)Vin3)Ct3))Ith3)Sense-3
C8 +3.3 0 220 Rser=0.1 x2
.tran 1.5m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2048 640
WIRE -640 -320 -960 -320
WIRE -288 -320 -640 -320
WIRE 352 -320 -288 -320
WIRE 656 -320 352 -320
WIRE -960 -304 -960 -320
WIRE -640 -272 -640 -320
WIRE 656 -272 656 -320
WIRE -560 -256 -592 -256
WIRE -288 -256 -288 -320
WIRE -128 -256 -128 -288
WIRE 192 -256 192 -288
WIRE 352 -256 352 -320
WIRE 608 -256 576 -256
WIRE -960 -208 -960 -224
WIRE -560 -176 -560 -256
WIRE -368 -176 -560 -176
WIRE 576 -176 576 -256
WIRE 576 -176 432 -176
WIRE -864 -160 -880 -160
WIRE -768 -160 -784 -160
WIRE -736 -160 -768 -160
WIRE -640 -160 -640 -176
WIRE -640 -160 -656 -160
WIRE 656 -160 656 -176
WIRE 688 -160 656 -160
WIRE 784 -160 768 -160
WIRE 800 -160 784 -160
WIRE 912 -160 880 -160
WIRE -768 -96 -768 -160
WIRE -464 -96 -768 -96
WIRE -368 -96 -464 -96
WIRE 464 -96 432 -96
WIRE 784 -96 784 -160
WIRE 784 -96 464 -96
WIRE -880 -16 -880 -160
WIRE -880 -16 -1008 -16
WIRE -464 -16 -464 -32
WIRE -464 -16 -880 -16
WIRE -368 -16 -464 -16
WIRE 464 -16 464 -32
WIRE 464 -16 432 -16
WIRE 912 -16 912 -160
WIRE 912 -16 464 -16
WIRE 1024 -16 912 -16
WIRE -1008 0 -1008 -16
WIRE -880 0 -880 -16
WIRE 912 0 912 -16
WIRE 1024 0 1024 -16
WIRE -640 16 -640 -160
WIRE -640 16 -752 16
WIRE 656 16 656 -160
WIRE 800 16 656 16
WIRE 656 32 656 16
WIRE -752 48 -752 16
WIRE -640 48 -640 16
WIRE 800 48 800 16
WIRE -368 64 -560 64
WIRE 576 64 432 64
WIRE -1008 96 -1008 80
WIRE -880 96 -880 64
WIRE 912 96 912 64
WIRE 1024 96 1024 80
WIRE 576 112 576 64
WIRE 608 112 576 112
WIRE -560 128 -560 64
WIRE -560 128 -592 128
WIRE -752 144 -752 112
WIRE -464 144 -496 144
WIRE -368 144 -384 144
WIRE 464 144 432 144
WIRE 560 144 544 144
WIRE 656 144 656 128
WIRE 800 144 800 112
WIRE 560 160 560 144
WIRE -640 176 -640 144
WIRE -496 176 -496 144
WIRE -288 240 -288 224
WIRE -144 240 -144 224
WIRE -16 240 -16 224
WIRE 80 240 80 224
WIRE 208 240 208 224
WIRE 352 240 352 224
WIRE 560 240 560 224
WIRE -496 256 -496 240
WIRE -16 320 -16 304
WIRE 80 320 80 304
FLAG 560 240 0
FLAG 352 240 0
FLAG 208 240 0
FLAG 80 320 0
FLAG -16 320 0
FLAG -144 240 0
FLAG -288 240 0
FLAG -496 256 0
FLAG 912 96 0
FLAG 656 144 0
FLAG 800 144 0
FLAG -880 96 0
FLAG -640 176 0
FLAG -752 144 0
FLAG 1024 96 0
FLAG -1008 96 0
FLAG -1008 -16 +3.3
FLAG 1024 -16 +5
FLAG -960 -208 0
FLAG -960 -320 IN
SYMBOL RES -368 128 R90
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL cap -512 176 R0
SYMATTR InstName C1
SYMATTR Value 3300p
SYMBOL cap 64 240 R0
SYMATTR InstName C2
SYMATTR Value 390p
SYMBOL cap -32 240 R0
SYMATTR InstName C3
SYMATTR Value 590p
SYMBOL res 448 160 R270
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL cap 544 160 R0
SYMATTR InstName C4
SYMATTR Value 3300p
SYMBOL NMOS 608 32 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL cap 448 -96 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL ind 672 -144 R270
SYMATTR InstName L1
SYMATTR Value 50
SYMBOL res 784 -176 M90
SYMATTR InstName R3
SYMATTR Value 50m
SYMBOL polcap 896 0 R0
SYMATTR SpiceLine2 x2
SYMATTR Value 220
SYMATTR SpiceLine Rser=0.1
SYMATTR InstName C6
SYMBOL schottky 784 112 M180
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL NMOS -592 48 M0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL PMOS -592 -176 R180
SYMATTR InstName Q3
SYMATTR Value FDC638P
SYMBOL ind -640 -144 M270
SYMATTR InstName L2
SYMATTR Value 50
SYMBOL res -768 -176 R90
SYMATTR InstName R4
SYMATTR Value 50m
SYMBOL schottky -768 112 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL cap -480 -96 R0
SYMATTR InstName C7
SYMATTR Value 1000p
SYMBOL res 1008 -16 R0
SYMATTR InstName Rload2
SYMATTR Value 10
SYMBOL res -1024 -16 R0
SYMATTR InstName Rload1
SYMATTR Value 10
SYMBOL VOLTAGE -960 -320 R0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL PMOS 608 -176 M180
SYMATTR InstName Q4
SYMATTR Value FDC638P
SYMBOL PowerProducts\\LTC1142HV 32 -16 R0
SYMATTR InstName U1
SYMBOL polcap -896 0 R0
SYMATTR SpiceLine2 x2
SYMATTR Value 220
SYMATTR SpiceLine Rser=0.1
SYMATTR InstName C8