* SPICE netlist
MQ1 N002 N013 0 0 Si4866DY
R1 N015 0 68K
R2 OUT N008 100K
R3 N008 0 60K
D1 N005 N004 BAT54
C1 N005 0 4.7
D2 0 N002 1N5818
MQ2 IN N001 N002 N002 Si4866DY
L1 N002 OUT 1.8
C2 OUT 0 180 Rser=15m
C3 N006 0 1000p Rser=10K
V1 IN 0 12
C4 N003 0 .001
C5 N002 N004 .1
XU1 0 N008 N006 0 0 0 N015 N011 N011 N014 N003 N009 N007 IN IN MP_01 0 MP_02 N005 N005 N013 0 0 N002 N002 N001 N004 N010 0 IN OUT N012 LTC3770 ;pnba Vrng)FB)Ith)SGND)Margin1)Margin0)Ion)VrefIn)VrefOut)MPGM)Track/SS)PLLFLTR)PLLIN)Vin)Vinsns))Z1))INTVcc)DRVcc)BG)PGND)Sense-)Sense+)SW)TG)Boost)Z0)FCB)Run)Von)Pgood
C7 N009 0 .01 Rser=10K
V2 N007 0 SINE(1 1 500K)
R4 N005 N010 75K
R5 N005 N012 100K
R6 0 N010 100K
Rload OUT 0 1
.tran 500u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1328 944
WIRE -360 -472 -472 -472
WIRE -232 -472 -360 -472
WIRE -72 -472 -232 -472
WIRE 264 -472 -72 -472
WIRE -472 -456 -472 -472
WIRE 264 -456 264 -472
WIRE -232 -440 -232 -472
WIRE -72 -440 -72 -472
WIRE -360 -376 -360 -472
WIRE -328 -376 -360 -376
WIRE 216 -376 24 -376
WIRE -472 -360 -472 -376
WIRE -328 -312 -360 -312
WIRE 152 -312 24 -312
WIRE 264 -312 264 -360
WIRE 264 -312 152 -312
WIRE 296 -312 264 -312
WIRE 328 -312 296 -312
WIRE 440 -312 408 -312
WIRE 536 -312 440 -312
WIRE 568 -312 536 -312
WIRE 664 -312 568 -312
WIRE 568 -296 568 -312
WIRE 664 -296 664 -312
WIRE 296 -280 296 -312
WIRE -424 -248 -456 -248
WIRE -328 -248 -360 -248
WIRE 152 -248 24 -248
WIRE 296 -200 296 -216
WIRE 568 -200 568 -232
WIRE 664 -200 664 -216
WIRE -328 -184 -360 -184
WIRE 72 -184 24 -184
WIRE 152 -184 72 -184
WIRE 232 -184 152 -184
WIRE 152 -168 152 -184
WIRE 440 -152 440 -312
WIRE -456 -120 -520 -120
WIRE -328 -120 -392 -120
WIRE 72 -120 72 -184
WIRE 72 -120 24 -120
WIRE 72 -104 72 -120
WIRE 152 -88 152 -104
WIRE -648 -56 -664 -56
WIRE -328 -56 -568 -56
WIRE 40 -56 24 -56
WIRE 440 -56 440 -72
WIRE 440 -56 392 -56
WIRE 440 -40 440 -56
WIRE -440 8 -504 8
WIRE -328 8 -376 8
WIRE 72 8 72 -24
WIRE 72 8 24 8
WIRE 104 8 72 8
WIRE 200 8 184 8
WIRE 440 56 440 40
WIRE -328 72 -344 72
WIRE 56 72 24 72
WIRE 232 72 232 -184
WIRE 232 72 136 72
WIRE 264 104 264 -312
WIRE 264 104 184 104
WIRE 264 120 264 104
WIRE -344 136 -344 72
WIRE -328 136 -344 136
WIRE 184 136 184 104
WIRE 184 136 24 136
WIRE -328 200 -344 200
WIRE 216 200 24 200
WIRE -328 264 -344 264
WIRE 264 264 264 216
WIRE 264 264 24 264
WIRE 264 280 264 264
WIRE -328 328 -344 328
WIRE 392 328 392 -56
WIRE 392 328 24 328
WIRE -424 392 -440 392
WIRE -328 392 -344 392
WIRE 536 392 536 -312
WIRE 536 392 24 392
WIRE -232 472 -232 456
WIRE -72 472 -72 456
FLAG -232 472 0
FLAG 40 -56 0
FLAG 264 280 0
FLAG 152 -88 0
FLAG 296 -200 0
FLAG 664 -200 0
FLAG 440 56 0
FLAG 568 -200 0
FLAG -520 -120 0
FLAG -472 -360 0
FLAG -456 -248 0
FLAG -472 -472 IN
FLAG 664 -312 OUT
FLAG -360 -312 0
FLAG -360 -184 0
FLAG -72 472 0
FLAG -504 8 0
FLAG -664 -56 0
FLAG 200 8 0
FLAG -440 392 0
FLAG -344 264 0
FLAG -344 200 0
SYMBOL NMOS 216 120 R0
SYMATTR InstName Q1
SYMATTR Value Si4866DY
SYMBOL RES -328 408 M270
SYMATTR InstName R1
SYMATTR Value 68K
SYMBOL res 424 -168 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res 424 -56 R0
SYMATTR InstName R3
SYMATTR Value 60K
SYMBOL schottky 136 -184 M180
SYMATTR InstName D1
SYMATTR Value BAT54
SYMBOL cap 136 -168 R0
SYMATTR InstName C1
SYMATTR Value 4.7
SYMBOL schottky 280 -216 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 216 -456 R0
SYMATTR InstName Q2
SYMATTR Value Si4866DY
SYMBOL ind 312 -296 R270
SYMATTR InstName L1
SYMATTR Value 1.8
SYMBOL polcap 552 -296 R0
SYMATTR InstName C2
SYMATTR Value 180
SYMATTR SpiceLine Rser=15m
SYMBOL cap -392 -136 R90
SYMATTR InstName C3
SYMATTR Value 1000p
SYMATTR SpiceLine Rser=10K
SYMBOL VOLTAGE -472 -472 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap -360 -264 R90
SYMATTR InstName C4
SYMATTR Value .001
SYMBOL cap 136 -312 R0
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL PowerProducts\\LTC3770 -152 -24 R0
SYMATTR InstName U1
SYMBOL cap -376 -8 R90
SYMATTR InstName C7
SYMATTR Value .01
SYMATTR SpiceLine Rser=10K
SYMBOL voltage -552 -56 R90
SYMATTR InstName V2
SYMATTR Value SINE(1 1 500K)
SYMBOL res 56 -120 R0
SYMATTR InstName R4
SYMATTR Value 75K
SYMBOL res 152 56 R90
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL res 200 -8 R90
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res 648 -312 R0
SYMATTR InstName Rload
SYMATTR Value 1