* SPICE netlist
MQ1 IN N002 N004 N004 BSC082N10LS
L1 N004 N005 33 Rser=15m
C1 OUT 0 150 m=3 Rser=0.1
R1 OUT N010 511K
R2 N010 0 36.5K
C2 N003 N004 0.1
C3 0 N001 0.1
C5 N012 0 0.01
V1 IN 0 30
MQ2 N004 N008 0 0 BSC082N10LS
Rload OUT 0 2.4
R4 N005 OUT 6m
R3 N009 0 30.1K
C6 N005 OUT 1n
R5 N006 N001 511K
R6 IN N007 1Meg
R7 N007 0 18.7K
R8 0 N011 75K
MQ3 IN N016 N014 N014 Si4482DY
C7 0 N014 4.7
XU1 N007 MP_01 N005 OUT N012 N010 N013 0 MP_02 N001 MP_03 MP_04 0 N006 MP_05 MP_06 N009 N011 0 N002 N004 N003 MP_07 N008 MP_08 N014 MP_09 N016 MP_10 IN MP_11 OUT MP_12 IN MP_13 MP_14 MP_15 N001 0 LTC7801 ;pnba OVLO))SENSE+)SENSE-)SS)VFB)ITH)MODE))CPUMP_EN)))PLLIN)PGOOD)))FREQ)DRVSET)DRVUV)TG)SW)BOOST))BG))DRVCC))NDRV))VIN))EXTVCC))RUN))))INTVCC)GND
C4 N015 0 4.7n
R9 N013 N015 10K
C8 N013 0 100p
.tran 2m startup

* LTspice schematic (.asc)
Version 4.1
SHEET 1 1504 1280
WIRE -720 -640 -752 -640
WIRE -640 -640 -720 -640
WIRE -592 -640 -640 -640
WIRE -416 -640 -592 -640
WIRE -240 -640 -416 -640
WIRE 208 -640 -240 -640
WIRE -752 -608 -752 -640
WIRE -368 -592 -464 -592
WIRE -128 -592 -368 -592
WIRE -80 -592 -128 -592
WIRE 640 -592 -16 -592
WIRE -80 -576 -80 -592
WIRE -752 -496 -752 -528
WIRE -80 -496 -80 -512
WIRE -240 -464 -240 -640
WIRE -128 -464 -128 -592
WIRE -16 -464 -16 -592
WIRE 208 -464 208 -640
WIRE -368 -384 -368 -592
WIRE -320 -384 -368 -384
WIRE 160 -384 64 -384
WIRE -416 -304 -416 -640
WIRE -320 -304 -416 -304
WIRE 96 -304 64 -304
WIRE 208 -304 208 -368
WIRE 208 -304 160 -304
WIRE 288 -304 208 -304
WIRE 400 -304 368 -304
WIRE 416 -304 400 -304
WIRE 512 -304 496 -304
WIRE 544 -304 512 -304
WIRE 592 -304 544 -304
WIRE 640 -304 640 -592
WIRE 640 -304 592 -304
WIRE 704 -304 640 -304
WIRE 752 -304 704 -304
WIRE 592 -288 592 -304
WIRE 752 -288 752 -304
WIRE -592 -240 -592 -640
WIRE -464 -224 -464 -592
WIRE -432 -224 -464 -224
WIRE -320 -224 -352 -224
WIRE 208 -224 208 -304
WIRE 208 -224 64 -224
WIRE 592 -192 592 -224
WIRE 752 -192 752 -208
WIRE -592 -144 -592 -160
WIRE -320 -144 -592 -144
WIRE 160 -144 64 -144
WIRE -592 -128 -592 -144
WIRE 208 -112 208 -128
WIRE -432 -64 -448 -64
WIRE -320 -64 -352 -64
WIRE 128 -64 64 -64
WIRE 400 -64 400 -304
WIRE 400 -64 128 -64
WIRE -592 -32 -592 -48
WIRE -320 16 -352 16
WIRE 128 16 128 0
WIRE 128 16 64 16
WIRE 512 16 512 -304
WIRE 512 16 128 16
WIRE -320 96 -352 96
WIRE 240 96 64 96
WIRE 320 96 240 96
WIRE 544 96 544 -304
WIRE 544 96 400 96
WIRE 240 112 240 96
WIRE 240 208 240 192
WIRE 80 256 64 256
WIRE 176 256 160 256
WIRE -416 336 -448 336
WIRE -320 336 -352 336
WIRE 96 336 64 336
WIRE -384 416 -496 416
WIRE -320 416 -384 416
WIRE -496 432 -496 416
WIRE -128 512 -128 496
WIRE -96 512 -128 512
WIRE -496 528 -496 512
WIRE -384 528 -384 416
WIRE -96 544 -96 512
WIRE -16 544 -16 496
WIRE -240 592 -240 496
WIRE -496 608 -496 592
WIRE -384 608 -384 592
WIRE -96 624 -96 608
WIRE -640 640 -640 -640
WIRE -320 640 -640 640
WIRE -128 640 -128 512
WIRE -128 640 -224 640
FLAG 208 -112 0
FLAG 592 -192 0
FLAG 752 -192 0
FLAG 240 208 0
FLAG 704 -304 OUT
FLAG -80 -496 0
FLAG -496 608 0
FLAG -448 336 0
FLAG -752 -496 0
FLAG -720 -640 IN
FLAG -96 624 0
FLAG -448 -64 0
FLAG -352 16 0
FLAG -592 -32 0
FLAG 96 336 0
FLAG 176 256 0
FLAG -352 96 0
FLAG -16 544 0
FLAG -384 608 0
SYMBOL nmos 160 -464 R0
SYMATTR InstName Q1
SYMATTR Value BSC082N10LS
SYMBOL ind 272 -288 R270
SYMATTR InstName L1
SYMATTR Value 33
SYMATTR SpiceLine Rser=15m
SYMBOL cap 576 -288 R0
SYMATTR Value 150
SYMATTR Value2 m=3
SYMATTR SpiceLine Rser=0.1
SYMATTR InstName C1
SYMBOL res 416 80 R90
SYMATTR InstName R1
SYMATTR Value 511K
SYMBOL res 224 96 R0
SYMATTR InstName R2
SYMATTR Value 36.5K
SYMBOL cap 96 -288 R270
SYMATTR InstName C2
SYMATTR Value 0.1
SYMBOL cap -96 -512 M180
SYMATTR InstName C3
SYMATTR Value 0.1
SYMBOL cap -352 320 R90
SYMATTR InstName C5
SYMATTR Value 0.01
SYMBOL voltage -752 -624 R0
SYMATTR Value 30
SYMATTR InstName V1
SYMBOL nmos 160 -224 R0
SYMATTR InstName Q2
SYMATTR Value BSC082N10LS
SYMBOL res 736 -304 R0
SYMATTR InstName Rload
SYMATTR Value 2.4
SYMBOL res 400 -288 R270
SYMATTR InstName R4
SYMATTR Value 6m
SYMBOL res -336 -80 R90
SYMATTR InstName R3
SYMATTR Value 30.1K
SYMBOL cap 112 -64 R0
SYMATTR InstName C6
SYMATTR Value 1n
SYMBOL res -336 -240 R90
SYMATTR InstName R5
SYMATTR Value 511K
SYMBOL res -608 -256 R0
SYMATTR InstName R6
SYMATTR Value 1Meg
SYMBOL res -608 -144 R0
SYMATTR InstName R7
SYMATTR Value 18.7K
SYMBOL res 176 240 R90
SYMATTR InstName R8
SYMATTR Value 75K
SYMBOL nmos -320 592 M90
SYMATTR InstName Q3
SYMATTR Value Si4482DY
SYMBOL cap -112 608 M180
SYMATTR InstName C7
SYMATTR Value 4.7
SYMBOL LTC7801 -128 32 R0
SYMATTR InstName U1
SYMBOL cap -512 528 R0
SYMATTR InstName C4
SYMATTR Value 4.7n
SYMBOL res -512 416 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL cap -400 528 R0
SYMATTR InstName C8
SYMATTR Value 100p