* SPICE netlist
C1 N006 N002 0.1
C2 0 N003 1n
L1 N001 N002 15 Rser=10m
C3 N020 -VIN 0.01
C4 N018 N021 15n
R1 0 N001 2m
R2 N013 N012 2
R3 N013 N014 1
R4 N009 N008 5.1
R5 N009 N011 1
Rload OUT 0 6
R6 OUT N015 402K
R7 N016 -VIN 10K
C5 OUT 0 10 m=4 Rser=10m
C6 OUT 0 68 m=3 Rser=0.066
R8 N021 -VIN 10K
C7 N018 -VIN 470p
C8 INTVcc -VIN 4.7
R9 INTVcc N005 100K
R10 N010 -VIN 187K
V1 0 -VIN 36
R11 N001 N003 51.1
M1 N002 N009 -VIN -VIN BSC060N10NS3 m=2
M2 OUT N013 N002 N002 BSC060N10NS3 m=2
XU1 0 N010 INTVcc -VIN NC_01 N006 0 N017 N019 NC_02 INTVcc N004 INTVcc 0 N003 N016 N018 N020 INTVcc INTVcc -VIN N014 N008 N011 N012 N002 N005 N015 N007 LTC7899 ;pnba VBIAS)FREQ)MODE)PHASMD)PLLIN/SPREAD)BOOST)RUN)DTCA)DTCB)ILIM)DRVUV)DRVCC)DRVSET)SENSE+)SENSE-)VFBB)ITH)SS)INTVCC)EXTVcc)-VIN)TGDN)BGUP)BGDN)TGUP)SW)PGOOD)VFBA)CLKOUT
D1 N004 N006 BAT46WJ
C9 0 -VIN 56 m=4 Rser=10m
C10 0 -VIN 10 m=4 Rser=3m
C11 -VIN N004 4.7
R12 N017 -VIN 20K
R13 N019 -VIN 21K
.tran 6m startup

* LTspice schematic (.asc)
Version 4.1
SHEET 1 1952 1440
WIRE -880 -720 -976 -720
WIRE -832 -720 -880 -720
WIRE -768 -720 -832 -720
WIRE -672 -720 -768 -720
WIRE -464 -720 -672 -720
WIRE -320 -720 -464 -720
WIRE -160 -720 -320 -720
WIRE -96 -720 -160 -720
WIRE 16 -720 -16 -720
WIRE 144 -720 16 -720
WIRE 384 -720 224 -720
WIRE 576 -720 384 -720
WIRE 704 -720 672 -720
WIRE 768 -720 704 -720
WIRE 864 -720 768 -720
WIRE 928 -720 864 -720
WIRE 976 -720 928 -720
WIRE -880 -704 -880 -720
WIRE 16 -704 16 -720
WIRE -768 -688 -768 -720
WIRE -672 -688 -672 -720
WIRE 768 -688 768 -720
WIRE 864 -688 864 -720
WIRE 976 -688 976 -720
WIRE -160 -592 -160 -720
WIRE -80 -592 -160 -592
WIRE 16 -592 16 -624
WIRE 16 -592 -16 -592
WIRE 240 -592 224 -592
WIRE 768 -592 768 -624
WIRE 864 -592 864 -624
WIRE 976 -592 976 -608
WIRE -880 -576 -880 -624
WIRE -768 -576 -768 -624
WIRE -768 -576 -880 -576
WIRE -672 -576 -672 -624
WIRE -672 -576 -768 -576
WIRE -880 -560 -880 -576
WIRE -464 -544 -464 -720
WIRE -320 -544 -320 -720
WIRE -160 -544 -160 -592
WIRE 16 -544 16 -592
WIRE 224 -544 224 -592
WIRE -656 -496 -688 -496
WIRE -640 -496 -656 -496
WIRE -640 -464 -640 -496
WIRE 224 -448 224 -480
WIRE 224 -448 96 -448
WIRE 224 -432 224 -448
WIRE -640 -352 -640 -384
WIRE -528 -352 -640 -352
WIRE 224 -352 224 -368
WIRE 224 -352 96 -352
WIRE 224 -336 224 -352
WIRE -528 -256 -608 -256
WIRE 224 -256 224 -272
WIRE 224 -256 96 -256
WIRE 384 -256 384 -720
WIRE 384 -256 224 -256
WIRE 384 -208 384 -256
WIRE -528 -176 -640 -176
WIRE 144 -176 96 -176
WIRE 256 -176 224 -176
WIRE 256 -128 256 -176
WIRE 336 -128 256 -128
WIRE -640 -80 -656 -80
WIRE -528 -80 -560 -80
WIRE 144 -80 96 -80
WIRE 256 -80 256 -128
WIRE 256 -80 224 -80
WIRE 384 -48 384 -112
WIRE 400 -48 384 -48
WIRE 144 16 96 16
WIRE 592 16 592 -672
WIRE 592 16 224 16
WIRE -528 112 -640 112
WIRE 144 112 96 112
WIRE 592 112 592 16
WIRE 592 112 224 112
WIRE -640 208 -640 112
WIRE -576 208 -640 208
WIRE -528 208 -576 208
WIRE 352 208 96 208
WIRE 704 208 704 -720
WIRE 704 208 432 208
WIRE -640 288 -640 208
WIRE -528 288 -640 288
WIRE 352 288 96 288
WIRE 352 304 352 288
WIRE -624 384 -640 384
WIRE -528 384 -544 384
WIRE 240 384 96 384
WIRE 352 416 352 384
WIRE 368 416 352 416
WIRE -640 480 -640 384
WIRE -624 480 -640 480
WIRE -528 480 -544 480
WIRE 144 480 96 480
WIRE 240 496 240 384
WIRE 352 496 240 496
WIRE 240 528 240 496
WIRE 352 576 352 496
WIRE -352 608 -352 576
WIRE -352 608 -400 608
WIRE -208 608 -208 576
WIRE -208 608 -352 608
WIRE 240 608 240 592
WIRE -352 624 -352 608
WIRE 144 624 144 480
WIRE -640 720 -640 480
WIRE -352 720 -352 688
WIRE -352 720 -640 720
WIRE -80 720 -80 576
WIRE -80 720 -352 720
WIRE -16 720 -80 720
WIRE 144 720 144 688
WIRE 144 720 -16 720
WIRE 240 720 240 688
WIRE 240 720 144 720
WIRE 352 720 352 640
WIRE 352 720 240 720
FLAG 976 -592 0
FLAG 928 -720 OUT
FLAG 864 -592 0
FLAG 768 -592 0
FLAG -16 720 -VIN
FLAG -656 -496 INTVcc
FLAG -400 608 INTVcc
FLAG -656 -80 -VIN
FLAG -832 -720 IN
FLAG -880 -560 -VIN
FLAG -976 -720 0
FLAG 240 -592 -VIN
FLAG -576 208 INTVcc
FLAG 400 -48 -VIN
FLAG 368 416 -VIN
FLAG -608 -256 -VIN
SYMBOL cap 208 -336 R0
SYMATTR InstName C1
SYMATTR Value 0.1
SYMBOL cap -80 -576 R270
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL ind 128 -704 R270
SYMATTR InstName L1
SYMATTR Value 15
SYMATTR SpiceLine Rser=10m
SYMBOL cap 128 624 R0
SYMATTR InstName C3
SYMATTR Value 0.01
SYMBOL cap 224 528 R0
SYMATTR Value 15n
SYMATTR InstName C4
SYMBOL res -112 -704 R270
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL res 240 0 R90
SYMATTR InstName R2
SYMATTR Value 2
SYMBOL res 240 96 R90
SYMATTR InstName R3
SYMATTR Value 1
SYMBOL res 240 -192 R90
SYMATTR InstName R4
SYMATTR Value 5.1
SYMBOL res 240 -96 R90
SYMATTR InstName R5
SYMATTR Value 1
SYMBOL res 960 -704 R0
SYMATTR InstName Rload
SYMATTR Value 6
SYMBOL res 448 192 R90
SYMATTR InstName R6
SYMATTR Value 402K
SYMBOL res 336 288 R0
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL cap 752 -688 R0
SYMATTR Value2 m=4
SYMATTR InstName C5
SYMATTR Value 10
SYMATTR SpiceLine Rser=10m
SYMBOL polcap 848 -688 R0
SYMATTR Value2 m=3
SYMATTR Value 68
SYMATTR InstName C6
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine Rser=0.066
SYMBOL res 224 592 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL cap 336 576 R0
SYMATTR InstName C7
SYMATTR Value 470p
SYMBOL cap -368 624 R0
SYMATTR InstName C8
SYMATTR Value 4.7
SYMBOL res -656 -480 R0
SYMATTR InstName R9
SYMATTR Value 100K
SYMBOL res -544 -96 R90
SYMATTR InstName R10
SYMATTR Value 187K
SYMBOL voltage -880 -720 R0
SYMATTR InstName V1
SYMATTR Value 36
SYMBOL res 0 -720 R0
SYMATTR InstName R11
SYMATTR Value 51.1
SYMBOL nmos 336 -208 R0
SYMATTR SpiceLine m=2
SYMATTR InstName M1
SYMATTR Value BSC060N10NS3
SYMBOL nmos 672 -672 M270
SYMATTR InstName M2
SYMATTR Value BSC060N10NS3
SYMATTR SpiceLine m=2
SYMBOL LTC7899 -208 -32 R0
SYMATTR InstName U1
SYMBOL diode 208 -432 R0
SYMATTR InstName D1
SYMATTR Value BAT46WJ
SYMBOL polcap -784 -688 R0
SYMATTR Value2 m=4
SYMATTR InstName C9
SYMATTR Value 56
SYMATTR SpiceLine Rser=10m
SYMBOL cap -688 -688 R0
SYMATTR Value2 m=4
SYMATTR InstName C10
SYMATTR Value 10
SYMATTR SpiceLine Rser=3m
SYMBOL cap 208 -544 R0
SYMATTR InstName C11
SYMATTR Value 4.7
SYMBOL res -528 368 R90
SYMATTR InstName R12
SYMATTR Value 20K
SYMBOL res -528 464 R90
SYMATTR InstName R13
SYMATTR Value 21K