* SPICE netlist
V1 IN 0 15
M1 N002 N003 N005 N005 Si4840DY
L1 N005 N006 15 Rser=25m
R1 IN N002 8m
R2 N009 0 8m
C1 N005 N011 1
D1 N010 N011 MBRS360
C2 N006 N012 1
D2 N010 N012 MBRS360
C3 N010 0 4.7
C4 N013 0 680p Rser=33K
C5 N014 N015 2n
R3 N024 0 130K
R5 IN N017 284K
R6 N017 0 100K
C6 N001 0 .1 Rser=20m
C7 N001 0 4.7 Rser=5m
C8 N001 0 56 x10 Rser=.1
M5 BAT N021 N020 N020 Si4425BDY
R7 N001 N020 20m
R8 N001 N018 100
R9 N020 N019 100
C9 N018 N019 .33
R10 BAT N023 95.3K
R11 N023 N022 20K
R12 N001 N016 95.3K
R13 N016 N022 20K
C10 N001 N016 2n
M2 N005 N007 N009 N009 Si4840DY
M3 N001 N004 N006 N006 Si4840DY
M4 N006 N008 0 0 Si4840DY
C12 BAT 0 50 rser=50m rpar=100 ic=0
XU2 N003 N011 0 0 N009 N002 IN N024 N017 N010 0 NC_01 NC_02 0 NC_03 N025 N023 N022 N016 BAT N021 N019 N018 N015 NC_04 N016 N014 N013 MP_05 N012 N004 N006 N008 N010 0 IN N007 N005 LTC4020 ;pnba TG1)BST1)SGND)SENSGND)SENSBOT)SENSTOP)SENSVIN)Rt)SHDN)Vin_reg)Mode)STAT1)STAT2)Timer)RNG/SS)NTC)VFB)VFBG)VFBmin)BAT)BGate)CSN)CSP)CSOUT)Ilimit)VFBmax)Ith)Vc))BST2)TG2)SW2)BG2)IntVcc)PGND)PVin)BG1)SW1
.tran 5m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1392 2176
WIRE -568 -1088 -664 -1088
WIRE -168 -1088 -568 -1088
WIRE -664 -1072 -664 -1088
WIRE -168 -1072 -168 -1088
WIRE 504 -1008 56 -1008
WIRE 536 -1008 504 -1008
WIRE 616 -1008 536 -1008
WIRE 696 -1008 616 -1008
WIRE -168 -976 -168 -992
WIRE -168 -976 -552 -976
WIRE 536 -976 536 -1008
WIRE 616 -976 616 -1008
WIRE 696 -976 696 -1008
WIRE -664 -960 -664 -992
WIRE -168 -960 -168 -976
WIRE 56 -960 56 -1008
WIRE -216 -880 -392 -880
WIRE 264 -880 104 -880
WIRE 536 -880 536 -912
WIRE 616 -880 616 -912
WIRE 696 -880 696 -912
WIRE -168 -832 -168 -864
WIRE -168 -832 -376 -832
WIRE -104 -832 -168 -832
WIRE 56 -832 56 -864
WIRE 56 -832 -24 -832
WIRE 248 -832 56 -832
WIRE -168 -816 -168 -832
WIRE 56 -816 56 -832
WIRE -216 -736 -360 -736
WIRE 232 -736 104 -736
WIRE -168 -704 -168 -720
WIRE -168 -704 -536 -704
WIRE 56 -704 56 -720
WIRE -168 -688 -168 -704
WIRE -168 -592 -168 -608
WIRE -504 -544 -584 -544
WIRE -72 -544 -504 -544
WIRE 296 -544 -72 -544
WIRE 424 -544 296 -544
WIRE -568 -528 -568 -1088
WIRE -168 -528 -568 -528
WIRE 424 -528 424 -544
WIRE -168 -496 -168 -528
WIRE -72 -496 -72 -544
WIRE 296 -496 296 -544
WIRE 424 -448 424 -464
WIRE -360 -432 -360 -736
WIRE -328 -432 -360 -432
WIRE 232 -432 232 -736
WIRE 232 -432 184 -432
WIRE -376 -336 -376 -832
WIRE -328 -336 -376 -336
WIRE 248 -336 248 -832
WIRE 248 -336 184 -336
WIRE -504 -288 -504 -544
WIRE -392 -240 -392 -880
WIRE -328 -240 -392 -240
WIRE 264 -240 264 -880
WIRE 264 -240 184 -240
WIRE -376 -224 -376 -336
WIRE 248 -224 248 -336
WIRE -504 -144 -504 -224
WIRE -376 -144 -376 -160
WIRE -376 -144 -504 -144
WIRE -328 -144 -376 -144
WIRE 248 -144 248 -160
WIRE 248 -144 184 -144
WIRE 296 -144 296 -432
WIRE 296 -144 248 -144
WIRE -328 -48 -360 -48
WIRE 232 -48 184 -48
WIRE 376 -48 296 -48
WIRE -536 48 -536 -704
WIRE -328 48 -536 48
WIRE 232 48 184 48
WIRE 312 48 296 48
WIRE 408 64 392 64
WIRE 504 64 504 -1008
WIRE 504 64 472 64
WIRE -552 144 -552 -976
WIRE -328 144 -552 144
WIRE 280 144 184 144
WIRE 392 144 392 64
WIRE 392 144 280 144
WIRE 408 144 392 144
WIRE 504 144 504 64
WIRE 504 144 488 144
WIRE 392 192 392 144
WIRE -568 240 -568 -528
WIRE -568 240 -680 240
WIRE -328 240 -568 240
WIRE 312 240 312 48
WIRE 312 240 184 240
WIRE -680 336 -680 320
WIRE -328 336 -680 336
WIRE 216 336 184 336
WIRE 408 336 216 336
WIRE 504 336 504 144
WIRE 504 336 488 336
WIRE -680 352 -680 336
WIRE 216 352 216 336
WIRE 504 352 504 336
WIRE -584 432 -584 -544
WIRE -328 432 -584 432
WIRE 216 432 216 416
WIRE 216 432 184 432
WIRE 408 432 216 432
WIRE 504 432 488 432
WIRE -680 448 -680 432
WIRE 504 512 504 432
WIRE -328 528 -360 528
WIRE 456 528 184 528
WIRE 504 624 504 608
WIRE 504 624 184 624
WIRE 648 624 504 624
WIRE 648 640 648 624
WIRE 504 704 504 624
WIRE 280 720 280 144
WIRE 280 720 184 720
WIRE 648 720 648 704
WIRE -328 816 -360 816
WIRE 392 816 392 272
WIRE 392 816 184 816
WIRE 408 816 392 816
WIRE 504 816 504 784
WIRE 504 816 488 816
WIRE 504 912 504 816
WIRE 504 912 184 912
WIRE -216 992 -216 976
WIRE -120 1008 -120 976
WIRE -24 1008 -24 976
WIRE 72 1008 72 976
WIRE -216 1088 -216 1072
FLAG -664 -960 0
FLAG -168 -592 0
FLAG 56 -704 0
FLAG -360 -48 0
FLAG 424 -448 0
FLAG 376 -48 0
FLAG -216 1088 0
FLAG -120 1008 0
FLAG -24 1008 0
FLAG -360 816 0
FLAG -680 448 0
FLAG 536 -880 0
FLAG 616 -880 0
FLAG 696 -880 0
FLAG 648 720 0
FLAG -664 -1088 IN
FLAG 648 624 BAT
FLAG -360 528 0
SYMBOL voltage -664 -1088 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL nmos -216 -960 R0
SYMATTR Value Si4840DY
SYMATTR InstName M1
SYMBOL ind -120 -816 R270
SYMATTR InstName L1
SYMATTR Value 15
SYMATTR SpiceLine Rser=25m
SYMBOL res -184 -1088 R0
SYMATTR InstName R1
SYMATTR Value 8m
SYMBOL res -184 -704 R0
SYMATTR InstName R2
SYMATTR Value 8m
SYMBOL cap -392 -224 R0
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL schottky -520 -288 R0
SYMATTR InstName D1
SYMATTR Value MBRS360
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 232 -224 R0
SYMATTR InstName C2
SYMATTR Value 1
SYMBOL schottky 280 -496 R0
SYMATTR InstName D2
SYMATTR Value MBRS360
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 408 -528 R0
SYMATTR InstName C3
SYMATTR Value 4.7
SYMBOL cap 232 -32 R270
SYMATTR InstName C4
SYMATTR Value 680p
SYMATTR SpiceLine Rser=33K
SYMBOL cap 232 64 R270
SYMATTR InstName C5
SYMATTR Value 2n
SYMBOL res -232 976 R0
SYMATTR InstName R3
SYMATTR Value 130K
SYMBOL res -696 224 R0
SYMATTR InstName R5
SYMATTR Value 284K
SYMBOL res -696 336 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL cap 520 -976 R0
SYMATTR InstName C6
SYMATTR Value .1
SYMATTR SpiceLine Rser=20m
SYMBOL cap 600 -976 R0
SYMATTR InstName C7
SYMATTR Value 4.7
SYMATTR SpiceLine Rser=5m
SYMBOL cap 680 -976 R0
SYMATTR Value2 x10
SYMATTR Value 56
SYMATTR InstName C8
SYMATTR SpiceLine Rser=.1
SYMBOL pmos 456 608 M180
SYMATTR InstName M5
SYMATTR Value Si4425BDY
SYMBOL res 488 336 R0
SYMATTR InstName R7
SYMATTR Value 20m
SYMBOL res 504 320 R90
SYMATTR InstName R8
SYMATTR Value 100
SYMBOL res 504 416 R90
SYMATTR InstName R9
SYMATTR Value 100
SYMBOL cap 200 352 R0
SYMATTR InstName C9
SYMATTR Value .33
SYMBOL res 488 688 R0
SYMATTR InstName R10
SYMATTR Value 95.3K
SYMBOL res 504 800 R90
SYMATTR InstName R11
SYMATTR Value 20K
SYMBOL res 504 128 R90
SYMATTR InstName R12
SYMATTR Value 95.3K
SYMBOL res 376 176 R0
SYMATTR InstName R13
SYMATTR Value 20K
SYMBOL cap 472 48 R90
SYMATTR InstName C10
SYMATTR Value 2n
SYMBOL nmos -216 -816 R0
SYMATTR Value Si4840DY
SYMATTR InstName M2
SYMBOL nmos 104 -960 M0
SYMATTR Value Si4840DY
SYMATTR InstName M3
SYMBOL nmos 104 -816 M0
SYMATTR Value Si4840DY
SYMATTR InstName M4
SYMBOL cap 632 640 R0
SYMATTR Value2 rser=50m rpar=100
SYMATTR SpiceLine ic=0
SYMATTR InstName C12
SYMATTR Value 50
SYMBOL LTC4020 -72 240 R0
SYMATTR InstName U2