* SPICE netlist
V1 IN 0 12
C1 OUT0 0 330 x3
C2 OUT1 0 330 x3
R1 OUT0 0 33m
R2 OUT1 0 33m
R3 N013 N015 10K
R4 N011 N015 10K
R5 Sync N015 10K
C3 OUT2 0 330 x3
C4 OUT3 0 330 x3
R6 OUT2 0 33m
R7 OUT3 0 33m
R8 N014 N016 10K
R9 N012 N016 10K
C5 N019 0 220p
C6 N021 0 220p
C7 N005 0 220p
C8 N003 0 220p
C9 N002 0 4.7n
C10 N004 0 4.7n
C11 N020 0 4.7n
C12 N018 0 4.7n
R10 IN N001 100k
R11 IN N006 100k
R12 IN N022 100k
R13 IN N017 100k
XU2 OUT0 0 IN OUT1 N018 N019 IN OUT0 NC_01 NC_02 Sync IN NC_03 NC_04 N016 NC_05 N011 N013 NC_06 Sync NC_07 NC_08 N008 NC_09 NC_10 NC_11 OUT2 N015 N021 N020 0 OUT1 N022 N009 0 N002 NC_12 NC_13 IN NC_14 0 N012 N014 N010 N007 N004 NC_15 N017 0 OUT3 IN IN N003 N005 OUT3 0 N001 N006 OUT2 LTM4681 Vi01n=5.5 Vi01of=5 Vo0=1 Vo1=1 ILM0=0 ILM1=0 OC0=1 OC1=1 MD01=1 FLT01=0 RTY01=.1m gm0=3m gm1=3m Rth0=5K Rth1=5K SYC01=0 F01=500K PH0=0 PH1=180 Tn0=.3m Tn0r=.5m Tn1=.3m Tn1r=.5m Tof0=.2m Tof0f=.3m Tof1=.2m Tof1f=.3m Vo0r=0 Vo1r=0 Vi23n=5.5 Vi23of=5 Vo2=1 Vo3=1 ILM2=0 ILM3=0 OC2=1 OC3=1 MD23=1 FLT23=0 RTY23=.1m gm2=3m gm3=3m Rth2=5K Rth3=5K SYC23=0 F23=500K PH2=0 PH3=180 Tn2=.3m Tn2r=.5m Tn3=.3m Tn3r=.5m Tof2=.2m Tof2f=.3m Tof3=.2m Tof3f=.3m Vo2r=0 Vo3r=0 ;pnba Vosns0+)Vosns0-)VIN_Vbias)Vout1)Comp0a)Comp0b)Vin23)Vout0)Vtrim0_cfg)Vtrim1_cfg)SYNC_01)SVin_23)Vtrim3_cfg)IntVcc_23)VDD33_23)VDD25_23)Run0)Run1)Fswph_23_cfg)SYNC_23)Vout0_cfg)Vout1_cfg)SW2)Fswph_01_cfg)VDD25_01)Vtrim2_cfg)Vosns2+)VDD33_01)Comp1b)Comp1a)Vosns1-)Vosns1+)PGood1)SW1)Vosns2-)Comp2a)Vout2_cfg)IntVcc_01)Vin01)Vbias)PGND)Run2)Run3)SW3)SW0)Comp3a)Vout3_cfg)PGood0)SGND)Vout3)Runp)SVin_01)Comp2b)Comp3b)Vosns3+)Vosns3-)PGood2)PGood3)Vout2
.tran 1.2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 3088 1856
WIRE 88 -928 -1016 -928
WIRE 1384 -928 88 -928
WIRE -744 -912 -776 -912
WIRE 1112 -912 1080 -912
WIRE -776 -896 -776 -912
WIRE 1080 -896 1080 -912
WIRE -344 -880 -344 -896
WIRE -200 -880 -200 -896
WIRE 504 -880 504 -896
WIRE 648 -880 648 -896
WIRE -40 -800 -56 -800
WIRE -776 -784 -776 -816
WIRE -344 -784 -344 -816
WIRE -200 -784 -200 -816
WIRE -56 -784 -56 -800
WIRE 88 -784 88 -928
WIRE 504 -784 504 -816
WIRE 648 -784 648 -816
WIRE 1080 -784 1080 -816
WIRE -1016 -720 -1016 -928
WIRE -920 -720 -1016 -720
WIRE -1016 -624 -1016 -720
WIRE -1016 -624 -1544 -624
WIRE -920 -624 -1016 -624
WIRE 1256 -624 1208 -624
WIRE 1384 -624 1384 -928
WIRE 1384 -624 1256 -624
WIRE -1544 -576 -1544 -624
WIRE -1016 -528 -1016 -624
WIRE -920 -528 -1016 -528
WIRE 1256 -528 1256 -624
WIRE 1256 -528 1208 -528
WIRE -1544 -464 -1544 -496
WIRE -920 -432 -952 -432
WIRE 1240 -432 1208 -432
WIRE -1160 -336 -1256 -336
WIRE -1016 -336 -1160 -336
WIRE -920 -336 -1016 -336
WIRE 1304 -336 1208 -336
WIRE 1448 -336 1304 -336
WIRE 1544 -336 1448 -336
WIRE -1256 -304 -1256 -336
WIRE 1544 -304 1544 -336
WIRE -1160 -288 -1160 -336
WIRE 1448 -288 1448 -336
WIRE -1016 -240 -1016 -336
WIRE -920 -240 -1016 -240
WIRE 1304 -240 1304 -336
WIRE 1304 -240 1208 -240
WIRE -1256 -144 -1256 -224
WIRE -1160 -144 -1160 -224
WIRE -1160 -144 -1256 -144
WIRE -920 -144 -1160 -144
WIRE 1448 -144 1448 -224
WIRE 1448 -144 1208 -144
WIRE 1544 -144 1544 -224
WIRE 1544 -144 1448 -144
WIRE -1160 -112 -1160 -144
WIRE 1448 -112 1448 -144
WIRE -920 -48 -952 -48
WIRE 1256 -48 1208 -48
WIRE -1160 48 -1256 48
WIRE -1016 48 -1160 48
WIRE -920 48 -1016 48
WIRE 1304 48 1208 48
WIRE 1448 48 1304 48
WIRE 1544 48 1448 48
WIRE -1256 80 -1256 48
WIRE 1544 80 1544 48
WIRE -1160 96 -1160 48
WIRE 1448 96 1448 48
WIRE -1016 144 -1016 48
WIRE -920 144 -1016 144
WIRE 1304 144 1304 48
WIRE 1304 144 1208 144
WIRE -1256 240 -1256 160
WIRE -1160 240 -1160 160
WIRE -1160 240 -1256 240
WIRE -920 240 -1160 240
WIRE 1448 240 1448 160
WIRE 1448 240 1208 240
WIRE 1544 240 1544 160
WIRE 1544 240 1448 240
WIRE -1160 272 -1160 240
WIRE 1448 272 1448 240
WIRE -920 336 -1128 336
WIRE 1384 336 1208 336
WIRE -920 432 -1032 432
WIRE 1288 432 1208 432
WIRE -1128 480 -1128 336
WIRE -1032 480 -1032 432
WIRE 1288 480 1288 432
WIRE 1384 480 1384 336
WIRE -1128 624 -1128 560
WIRE -1032 624 -1032 560
WIRE -1032 624 -1128 624
WIRE -920 624 -1032 624
WIRE 1288 624 1288 560
WIRE 1288 624 1208 624
WIRE 1384 624 1384 560
WIRE 1384 624 1288 624
WIRE 88 800 88 784
WIRE 232 800 232 784
WIRE -776 816 -776 784
WIRE -344 816 -344 784
WIRE -200 816 -200 784
WIRE -56 816 -56 784
WIRE -40 816 -56 816
WIRE 520 816 520 784
WIRE 664 816 664 784
WIRE 1096 816 1096 784
WIRE -56 832 -56 816
WIRE -344 896 -344 880
WIRE -200 896 -200 880
WIRE 520 896 520 880
WIRE 664 896 664 880
WIRE -776 912 -776 896
WIRE -744 912 -776 912
WIRE 1096 912 1096 896
WIRE 1128 912 1096 912
WIRE -1032 928 -1032 624
WIRE -56 928 -56 912
WIRE -56 928 -1032 928
FLAG -1544 -464 0
FLAG -1160 -112 0
FLAG -1160 272 0
FLAG 88 800 0
FLAG 232 800 0
FLAG 1448 -112 0
FLAG 1448 272 0
FLAG -1544 -624 IN
FLAG -1256 -336 OUT0
FLAG -1256 48 OUT1
FLAG 1544 -336 OUT2
FLAG 1544 48 OUT3
FLAG -200 896 0
FLAG 664 896 0
FLAG 648 -896 0
FLAG -200 -896 0
FLAG -344 -896 0
FLAG 504 -896 0
FLAG 520 896 0
FLAG -344 896 0
FLAG -40 816 Sync
FLAG -40 -800 Sync
FLAG -744 -912 IN
FLAG 1112 -912 IN
FLAG 1128 912 IN
FLAG -744 912 IN
SYMBOL voltage -1544 -592 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap -1176 -288 R0
SYMATTR Value2 x3
SYMATTR InstName C1
SYMATTR Value 330
SYMBOL cap -1176 96 R0
SYMATTR Value2 x3
SYMATTR InstName C2
SYMATTR Value 330
SYMBOL res -1272 -320 R0
SYMATTR InstName R1
SYMATTR Value 33m
SYMBOL res -1272 64 R0
SYMATTR InstName R2
SYMATTR Value 33m
SYMBOL res -1048 464 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res -1144 464 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL res -72 816 R0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL cap 1432 -288 R0
SYMATTR Value2 x3
SYMATTR InstName C3
SYMATTR Value 330
SYMBOL cap 1432 96 R0
SYMATTR Value2 x3
SYMATTR InstName C4
SYMATTR Value 330
SYMBOL res 1528 -320 R0
SYMATTR InstName R6
SYMATTR Value 33m
SYMBOL res 1528 64 R0
SYMATTR InstName R7
SYMATTR Value 33m
SYMBOL res 1272 464 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL res 1368 464 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL cap -216 816 R0
SYMATTR InstName C5
SYMATTR Value 220p
SYMBOL cap 648 816 R0
SYMATTR InstName C6
SYMATTR Value 220p
SYMBOL cap 632 -816 M180
SYMATTR InstName C7
SYMATTR Value 220p
SYMBOL cap -216 -816 M180
SYMATTR InstName C8
SYMATTR Value 220p
SYMBOL cap -360 -816 M180
SYMATTR InstName C9
SYMATTR Value 4.7n
SYMBOL cap 488 -816 M180
SYMATTR InstName C10
SYMATTR Value 4.7n
SYMBOL cap 504 816 R0
SYMATTR InstName C11
SYMATTR Value 4.7n
SYMBOL cap -360 816 R0
SYMATTR InstName C12
SYMATTR Value 4.7n
SYMBOL res -792 -912 R0
SYMATTR InstName R10
SYMATTR Value 100k
SYMBOL res 1064 -912 R0
SYMATTR InstName R11
SYMATTR Value 100k
SYMBOL res 1080 912 M180
SYMATTR InstName R12
SYMATTR Value 100k
SYMBOL res -792 912 M180
SYMATTR InstName R13
SYMATTR Value 100k
SYMBOL LTM4681 -664 -240 R0
SYMATTR InstName U2