* SPICE netlist
R1 N013 0 60.4K tol=1 pwr=0.1
R2 N012 N013 39.2K tol=1 pwr=0.1
R3 N001 N012 806K tol=1 pwr=0.1
R4 N019 0 68.1K
R5 N017 N019 31.6K
R6 N005 N017 1.05Meg
R7 N015 N014 1Meg
R8 N021 0 49.9K
R9 N020 N021 16.9K
R10 N009 N020 698K
C1 N003 N007 15n
R11 N007 N008 1.43K
D1 N008 N007 BAT54
R12 N015 N016 1Meg
R13 N015 N018 1Meg
MQ1 N001 N004 N002 N002 FDS4685
C2 N003 0 100 V=25 Irms=2.4 Rser=0.05 Lser=0 mfg="KEMET" pn="T510E107K025AS" type="Tantalum"
I1 N003 0 2 load
V1 N005 0 PULSE(0 14.8 3 1m 1m 24 48)
V2 N009 0 PULSE(0 12 3 1m 1m 40 80)
MQ2 N003 N004 N002 N002 FDS4685
MQ3 N005 N007 N006 N006 FDS4685
MQ4 N003 N007 N006 N006 FDS4685
MQ5 N009 N011 N010 N010 FDS4685
MQ6 N003 N011 N010 N010 FDS4685
V3 N001 0 PWL(0 0 15 18 24 7.2 24.1 -20 25 -20 25.1 20)
V4 N015 0 PULSE(0 12 0 1m 1m 40 80)
XU1 EN _SHDN 0 N012 N013 N017 N019 N020 N021 N014 N016 N018 0 CAS N003 N011 N010 N008 N006 N004 N002 N009 N005 N001 LTC4417 ;pnba EN)_SHDN)HYS)UV1)OV1)UV2)OV2)UV3)OV3)_VALID1)_VALID2)_VALID3)VNEG)CAS)Vout)G3)VS3)G2)VS2)G1)VS1)V3)V2)V1
.tran 30

* LTspice schematic (.asc)
Version 4
SHEET 1 1712 1568
WIRE -264 -784 -856 -784
WIRE -184 -784 -264 -784
WIRE -72 -784 -88 -784
WIRE -8 -784 -72 -784
WIRE 568 -784 88 -784
WIRE 712 -784 568 -784
WIRE 856 -784 712 -784
WIRE -856 -768 -856 -784
WIRE 712 -768 712 -784
WIRE 856 -768 856 -784
WIRE -104 -720 -104 -736
WIRE -8 -720 -104 -720
WIRE 8 -720 8 -736
WIRE 8 -720 -8 -720
WIRE -856 -672 -856 -688
WIRE 712 -672 712 -704
WIRE 856 -672 856 -688
WIRE -328 -640 -856 -640
WIRE 24 -640 -328 -640
WIRE 136 -640 120 -640
WIRE 200 -640 136 -640
WIRE 328 -640 296 -640
WIRE 568 -640 568 -784
WIRE 568 -640 328 -640
WIRE -856 -624 -856 -640
WIRE 328 -608 328 -640
WIRE 104 -576 104 -592
WIRE 200 -576 104 -576
WIRE 216 -576 216 -592
WIRE 216 -576 200 -576
WIRE -856 -528 -856 -544
WIRE 200 -528 200 -576
WIRE 328 -528 328 -544
WIRE 328 -528 200 -528
WIRE 200 -496 200 -528
WIRE 328 -496 328 -528
WIRE 200 -400 200 -416
WIRE 328 -400 328 -432
WIRE 328 -400 200 -400
WIRE -392 -352 -856 -352
WIRE 232 -352 -392 -352
WIRE 344 -352 328 -352
WIRE 408 -352 344 -352
WIRE 568 -352 568 -640
WIRE 568 -352 504 -352
WIRE -856 -336 -856 -352
WIRE 312 -288 312 -304
WIRE 408 -288 312 -288
WIRE 424 -288 424 -304
WIRE 424 -288 408 -288
WIRE -72 -256 -72 -784
WIRE -8 -256 -8 -720
WIRE 136 -256 136 -640
WIRE 200 -256 200 -400
WIRE 344 -256 344 -352
WIRE 408 -256 408 -288
WIRE -856 -240 -856 -256
WIRE -264 -192 -264 -784
WIRE -136 -192 -264 -192
WIRE -264 -80 -264 -112
WIRE -136 -80 -264 -80
WIRE 568 -80 568 -352
WIRE 568 -80 456 -80
WIRE -264 -64 -264 -80
WIRE -264 32 -264 16
WIRE -136 32 -264 32
WIRE 552 32 456 32
WIRE 664 32 632 32
WIRE 776 32 664 32
WIRE 776 48 776 32
WIRE -328 144 -328 -640
WIRE -136 144 -328 144
WIRE 488 144 456 144
WIRE 664 144 664 32
WIRE 664 144 568 144
WIRE 776 144 776 128
WIRE -328 160 -328 144
WIRE -328 256 -328 240
WIRE -136 256 -328 256
WIRE 552 256 456 256
WIRE 664 256 664 144
WIRE 664 256 632 256
WIRE -328 272 -328 256
WIRE -328 368 -328 352
WIRE -136 368 -328 368
WIRE 488 368 456 368
WIRE -392 480 -392 -352
WIRE -136 480 -392 480
WIRE 488 480 456 480
WIRE -392 496 -392 480
WIRE -392 592 -392 576
WIRE -136 592 -392 592
WIRE 488 592 456 592
WIRE -392 608 -392 592
WIRE -392 704 -392 688
WIRE -136 704 -392 704
WIRE 488 704 456 704
WIRE 168 784 168 752
FLAG 488 368 EN
FLAG 488 480 _SHDN
FLAG -856 -672 0
FLAG -856 -528 0
FLAG -856 -240 0
FLAG -264 112 0
FLAG -328 448 0
FLAG -392 784 0
FLAG 168 784 0
FLAG 488 592 0
FLAG 856 -672 0
FLAG 712 -672 0
FLAG 488 704 CAS
FLAG 776 144 0
SYMBOL res -280 16 R0
SYMATTR User1 1%
SYMATTR InstName R1
SYMATTR Value 60.4K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -280 -80 R0
SYMATTR User1 1%
SYMATTR InstName R2
SYMATTR Value 39.2K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -280 -208 R0
SYMATTR User1 1%
SYMATTR InstName R3
SYMATTR Value 806K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -344 352 R0
SYMATTR InstName R4
SYMATTR Value 68.1K
SYMBOL res -344 256 R0
SYMATTR InstName R5
SYMATTR Value 31.6K
SYMBOL res -344 144 R0
SYMATTR InstName R6
SYMATTR Value 1.05Meg
SYMBOL res 648 16 R90
SYMATTR InstName R7
SYMATTR Value 1Meg
SYMATTR User1 5%
SYMBOL res -408 688 R0
SYMATTR InstName R8
SYMATTR Value 49.9K
SYMBOL res -408 592 R0
SYMATTR InstName R9
SYMATTR Value 16.9K
SYMBOL res -408 480 R0
SYMATTR InstName R10
SYMATTR Value 698K
SYMBOL cap 312 -608 R0
SYMATTR InstName C1
SYMATTR Value 15n
SYMBOL res 184 -512 R0
SYMATTR InstName R11
SYMATTR Value 1.43K
SYMBOL schottky 312 -432 M180
SYMATTR InstName D1
SYMATTR Value BAT54
SYMBOL res 584 128 R90
SYMATTR InstName R12
SYMATTR Value 1Meg
SYMATTR User1 5%
SYMBOL res 648 240 R90
SYMATTR InstName R13
SYMATTR Value 1Meg
SYMATTR User1 5%
SYMBOL pmos -184 -736 R270
SYMATTR InstName Q1
SYMATTR Value FDS4685
SYMBOL polcap 696 -768 R0
SYMATTR Value 100
SYMATTR InstName C2
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=25 Irms=2.4 Rser=0.05 Lser=0 mfg="KEMET" pn="T510E107K025AS" type="Tantalum"
SYMBOL current 856 -768 R0
SYMATTR SpiceLine load
SYMATTR Value 2
SYMATTR InstName I1
SYMBOL voltage -856 -640 R0
SYMATTR InstName V1
SYMATTR Value PULSE(0 14.8 3 1m 1m 24 48)
SYMBOL voltage -856 -352 R0
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 3 1m 1m 40 80)
SYMBOL pmos 88 -736 M270
SYMATTR InstName Q2
SYMATTR Value FDS4685
SYMBOL pmos 24 -592 R270
SYMATTR InstName Q3
SYMATTR Value FDS4685
SYMBOL pmos 296 -592 M270
SYMATTR InstName Q4
SYMATTR Value FDS4685
SYMBOL pmos 232 -304 R270
SYMATTR InstName Q5
SYMATTR Value FDS4685
SYMBOL pmos 504 -304 M270
SYMATTR InstName Q6
SYMATTR Value FDS4685
SYMBOL voltage -856 -784 R0
SYMATTR InstName V3
SYMATTR Value PWL(0 0 15 18 24 7.2 24.1 -20 25 -20 25.1 20)
SYMBOL voltage 776 32 R0
SYMATTR InstName V4
SYMATTR Value PULSE(0 12 0 1m 1m 40 80)
SYMBOL SpecialFunctions\\LTC4417 168 192 R0
SYMATTR InstName U1