* SPICE netlist
MQ1 IN N015 N017 N017 PHM21NQ15T
D2 N001 N013 RF04UA2D
C1 N002 0 2.2
MQ2 N004 N016 N018 N018 PHM21NQ15T
MQ3 N018 N020 N026 N026 PHM21NQ15T
V1 IN 0 70
C2 N004 0 30
R1 N025 0 12.1K
R2 OUT N025 475K
R3 N026 0 4m
C3 N013 N017 .22
C4 N014 N018 .22
C5 N021 0 .005
C6 N023 0 10n
R4 N024 N023 10K
MQ4 N017 N019 N026 N026 PHM21NQ15T
L1 N017 N018 15 Rpar=1K
R5 N004 OUT 4m
R6 N022 0 56.2K
C7 OUT 0 56
R7 OUT N006 100
R8 N004 N008 100
C8 N006 N008 4.7
Rload OUT 0 10
XU1 N025 N021 N026 0 N024 0 N012 N022 N007 IN N004 0 N008 N006 N005 N018 N016 N014 N020 N003 N002 IN N019 0 N013 N015 N017 N009 N001 N010 N011 LTC3779 ;pnba FB)SS)Sense+)Sense-)Ith)SGND)PLLIN)Freq)Run)Vinsns)Voutsns)Mode)Iosense+)Iosense-)VinOV)SW2))Boost2))EXTVcc)V5)Vin))PGND)Boost1))SW1)Pgood)DRVcc)NDRV)DRVset
R9 IN N007 10K
R11 N005 0 1.21K
R12 IN N005 133K
M1 IN N010 N001 N001 Si9420DY
C9 N001 0 10
C10 N024 0 100p
D1 N001 N014 RF04UA2D
.tran 2.5m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1856 1264
WIRE 352 -632 -448 -632
WIRE 0 -584 0 -600
WIRE -784 -520 -928 -520
WIRE -736 -520 -784 -520
WIRE -624 -520 -736 -520
WIRE -384 -520 -624 -520
WIRE -320 -520 -384 -520
WIRE -128 -520 -320 -520
WIRE -928 -504 -928 -520
WIRE -128 -504 -128 -520
WIRE 0 -504 0 -520
WIRE 128 -504 128 -520
WIRE -384 -488 -384 -520
WIRE -736 -472 -736 -520
WIRE -320 -456 -320 -520
WIRE -288 -456 -320 -456
WIRE 656 -456 288 -456
WIRE -928 -408 -928 -424
WIRE -736 -376 -736 -392
WIRE -288 -376 -736 -376
WIRE 400 -376 288 -376
WIRE 480 -376 400 -376
WIRE 816 -376 560 -376
WIRE -736 -360 -736 -376
WIRE -384 -296 -384 -408
WIRE -288 -296 -384 -296
WIRE 400 -296 400 -312
WIRE 400 -296 288 -296
WIRE 544 -296 400 -296
WIRE 656 -296 656 -456
WIRE 656 -296 624 -296
WIRE -736 -264 -736 -280
WIRE -624 -216 -624 -520
WIRE -288 -216 -304 -216
WIRE 304 -216 288 -216
WIRE -288 -136 -576 -136
WIRE 304 -136 288 -136
WIRE 352 -88 352 -632
WIRE -624 -56 -624 -120
WIRE -448 -56 -448 -632
WIRE -448 -56 -624 -56
WIRE -288 -56 -448 -56
WIRE 304 -56 288 -56
WIRE -624 -40 -624 -56
WIRE -784 24 -784 -520
WIRE -448 24 -448 8
WIRE -288 24 -448 24
WIRE 352 24 352 -24
WIRE 352 24 288 24
WIRE 656 24 656 -296
WIRE 656 24 544 24
WIRE 688 24 656 24
WIRE 784 24 768 24
WIRE 816 24 816 -376
WIRE 816 24 784 24
WIRE 928 24 816 24
WIRE -624 40 -624 24
WIRE 656 40 656 24
WIRE 816 40 816 24
WIRE 928 40 928 24
WIRE -288 104 -736 104
WIRE 496 104 288 104
WIRE 656 136 656 104
WIRE 816 136 816 104
WIRE 928 136 928 120
WIRE -784 184 -784 120
WIRE -784 184 -816 184
WIRE -448 184 -448 88
WIRE -448 184 -784 184
WIRE -288 184 -448 184
WIRE 352 184 352 88
WIRE 352 184 288 184
WIRE 544 184 544 120
WIRE 544 184 352 184
WIRE 576 184 544 184
WIRE -288 264 -736 264
WIRE 496 264 288 264
WIRE 784 328 784 24
WIRE -416 344 -480 344
WIRE -288 344 -352 344
WIRE 304 344 288 344
WIRE 400 344 384 344
WIRE -480 424 -544 424
WIRE -352 424 -400 424
WIRE -288 424 -352 424
WIRE 784 424 784 408
WIRE 784 424 288 424
WIRE -544 440 -544 424
WIRE -352 440 -352 424
WIRE 784 440 784 424
WIRE -192 488 -192 472
WIRE 192 488 192 472
WIRE -544 520 -544 504
WIRE -352 520 -352 504
WIRE -64 520 -64 472
WIRE -32 520 -64 520
WIRE 64 520 64 472
WIRE 64 520 48 520
WIRE 96 520 64 520
WIRE 784 536 784 520
WIRE -784 568 -784 280
WIRE -64 568 -64 520
WIRE -64 568 -784 568
WIRE 544 568 544 280
WIRE 544 568 -64 568
WIRE -816 616 -816 184
WIRE 176 616 -816 616
WIRE 576 616 576 184
WIRE 576 616 256 616
FLAG 0 -600 0
FLAG -928 -408 0
FLAG 656 136 0
FLAG 784 536 0
FLAG 96 520 0
FLAG 192 488 0
FLAG -480 344 0
FLAG -544 520 0
FLAG -192 488 0
FLAG 928 136 0
FLAG 400 344 0
FLAG -928 -520 IN
FLAG 816 136 0
FLAG -736 -264 0
FLAG -624 40 0
FLAG 304 -216 0
FLAG -352 520 0
FLAG 928 24 OUT
SYMBOL nmos -736 24 M0
SYMATTR Value PHM21NQ15T
SYMATTR InstName Q1
SYMBOL diode -464 -56 R0
SYMATTR InstName D2
SYMATTR Value RF04UA2D
SYMBOL cap -16 -520 M180
SYMATTR InstName C1
SYMATTR Value 2.2
SYMBOL nmos 496 24 R0
SYMATTR Value PHM21NQ15T
SYMATTR InstName Q2
SYMBOL nmos 496 184 R0
SYMATTR Value PHM21NQ15T
SYMATTR InstName Q3
SYMBOL voltage -928 -520 R0
SYMATTR InstName V1
SYMATTR Value 70
SYMBOL cap 640 40 R0
SYMATTR InstName C2
SYMATTR Value 30
SYMBOL res 768 424 R0
SYMATTR InstName R1
SYMATTR Value 12.1K
SYMBOL res 768 312 R0
SYMATTR InstName R2
SYMATTR Value 475K
SYMBOL res -48 536 R270
SYMATTR InstName R3
SYMATTR Value 4m
SYMBOL cap -464 24 R0
SYMATTR InstName C3
SYMATTR Value .22
SYMBOL cap 336 24 R0
SYMATTR InstName C4
SYMATTR Value .22
SYMBOL cap -352 328 R90
SYMATTR InstName C5
SYMATTR Value .005
SYMBOL cap -560 440 R0
SYMATTR InstName C6
SYMATTR Value 10n
SYMBOL res -384 408 R90
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL nmos -736 184 M0
SYMATTR Value PHM21NQ15T
SYMATTR InstName Q4
SYMBOL ind 160 632 R270
SYMATTR InstName L1
SYMATTR Value 15
SYMATTR SpiceLine Rpar=1K
SYMBOL res 672 40 R270
SYMATTR InstName R5
SYMATTR Value 4m
SYMBOL res 288 360 R270
SYMATTR InstName R6
SYMATTR Value 56.2K
SYMBOL cap 800 40 R0
SYMATTR InstName C7
SYMATTR Value 56
SYMBOL res 576 -392 R90
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL res 640 -312 R90
SYMATTR InstName R8
SYMATTR Value 100
SYMBOL cap 384 -376 R0
SYMATTR InstName C8
SYMATTR Value 4.7
SYMBOL res 912 24 R0
SYMATTR InstName Rload
SYMATTR Value 10
SYMBOL PowerProducts\\LTC3779 0 -24 R0
SYMATTR InstName U1
SYMBOL res -400 -504 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL res -752 -376 R0
SYMATTR InstName R11
SYMATTR Value 1.21K
SYMBOL res -752 -488 R0
SYMATTR InstName R12
SYMATTR Value 133K
SYMBOL nmos -576 -216 M0
SYMATTR InstName M1
SYMATTR Value Si9420DY
SYMBOL cap -640 -40 R0
SYMATTR InstName C9
SYMATTR Value 10
SYMBOL cap -368 440 R0
SYMATTR InstName C10
SYMATTR Value 100p
SYMBOL diode 336 -88 R0
SYMATTR InstName D1
SYMATTR Value RF04UA2D