* SPICE netlist
V1 IN 0 25
R1 N001 IN 10m
L1 N001 N002 10
D1 N002 OUT RB085BM-90
M1 N002 N005 0 0 BSC028N06LS3
R2 N003 IN 10m
L2 N003 N004 10
D2 N004 OUT RB085BM-90
M2 N004 N006 0 0 BSC028N06LS3
C1 OUT 0 10 m=5
R4 N009 N008 10K
C2 0 N009 22n
R5 N007 N010 100K
C3 N007 0 4.7
R6 N011 0 200K
XU2 IN IN IN N001 N003 IN NC_01 NC_02 NC_03 0 NC_04 N011 N008 N007 N010 OUT N005 N006 0 N007 LT8277 CLKOUT=1 CLKOUT_EN=1 SS=1 PH2_LL=0 t0=30m v0=30 t1=50m v1=60 t2=65m v2=45 t3=75m v3=50 t4=85m v4=40 t5=95m v5=35 t6=115m v6=55 t7=125m v7=48 t8=135m v8=32 t9=150m v9=52 ;pnba VIN)EN/UVLO)SNSP1)SNSN1)SNSN2)SNSP2)SDI)_CS)SCK)SYNC/SPRD)CLKOUT)RT)VC)MODE)PGOOD)VOUT)GATE1)GATE2)GND)INTVCC
RLOAD OUT 0 30.1
.tran 21m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1248 848
WIRE -608 -408 -624 -408
WIRE -528 -408 -608 -408
WIRE -448 -408 -528 -408
WIRE -256 -408 -368 -408
WIRE -16 -408 -176 -408
WIRE 272 -408 -16 -408
WIRE 448 -408 336 -408
WIRE 512 -408 448 -408
WIRE 608 -408 512 -408
WIRE 624 -408 608 -408
WIRE 512 -376 512 -408
WIRE 624 -376 624 -408
WIRE -624 -344 -624 -408
WIRE -528 -312 -528 -408
WIRE -272 -312 -528 -312
WIRE -144 -312 -192 -312
WIRE 224 -312 -64 -312
WIRE 272 -312 224 -312
WIRE 448 -312 448 -408
WIRE 448 -312 336 -312
WIRE 512 -264 512 -312
WIRE 624 -264 624 -296
WIRE -16 -248 -16 -408
WIRE -448 -232 -448 -408
WIRE -368 -232 -368 -408
WIRE -272 -232 -272 -312
WIRE -192 -232 -192 -312
WIRE -624 -216 -624 -264
WIRE -528 -168 -528 -312
WIRE -512 -168 -528 -168
WIRE -64 -168 -128 -168
WIRE 224 -168 224 -312
WIRE -16 -120 -16 -152
WIRE -528 -88 -528 -168
WIRE -512 -88 -528 -88
WIRE 176 -88 -128 -88
WIRE 224 -40 224 -72
WIRE -608 -8 -624 -8
WIRE -528 -8 -544 -8
WIRE -512 -8 -528 -8
WIRE 448 -8 448 -312
WIRE 448 -8 -128 -8
WIRE -528 72 -528 -8
WIRE -512 72 -528 72
WIRE -64 72 -128 72
WIRE 48 72 16 72
WIRE 160 72 112 72
WIRE -96 152 -128 152
WIRE 80 152 -16 152
WIRE -96 312 -128 312
WIRE 16 312 -16 312
WIRE -416 392 -416 376
WIRE -208 392 -208 376
WIRE -528 424 -528 72
WIRE 80 424 80 152
WIRE 80 424 -528 424
FLAG -624 -216 0
FLAG -16 -120 0
FLAG 224 -40 0
FLAG 512 -264 0
FLAG 624 -264 0
FLAG 160 72 0
FLAG -624 -8 0
FLAG -208 392 0
FLAG -416 392 0
FLAG 16 312 0
FLAG -608 -408 IN
FLAG 608 -408 OUT
SYMBOL voltage -624 -360 R0
SYMATTR InstName V1
SYMATTR Value 25
SYMBOL res -352 -424 R90
SYMATTR InstName R1
SYMATTR Value 10m
SYMBOL ind -272 -392 R270
SYMATTR InstName L1
SYMATTR Value 10
SYMBOL schottky 272 -392 R270
SYMATTR InstName D1
SYMATTR Value RB085BM-90
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -64 -248 R0
SYMATTR InstName M1
SYMATTR Value BSC028N06LS3
SYMBOL res -176 -328 R90
SYMATTR InstName R2
SYMATTR Value 10m
SYMBOL ind -160 -296 R270
SYMATTR InstName L2
SYMATTR Value 10
SYMBOL schottky 272 -296 R270
SYMATTR InstName D2
SYMATTR Value RB085BM-90
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 176 -168 R0
SYMATTR InstName M2
SYMATTR Value BSC028N06LS3
SYMBOL cap 496 -376 R0
SYMATTR InstName C1
SYMATTR Value 10
SYMATTR Value2 m=5
SYMBOL res 32 56 R90
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL cap 112 56 R90
SYMATTR InstName C2
SYMATTR Value 22n
SYMBOL res 0 136 R90
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL cap -544 -24 R90
SYMATTR InstName C3
SYMATTR Value 4.7
SYMBOL res -112 296 M90
SYMATTR InstName R6
SYMATTR Value 200K
SYMBOL LT8277 -320 72 R0
SYMATTR InstName U2
SYMBOL res 608 -392 R0
SYMATTR InstName RLOAD
SYMATTR Value 30.1