Version 4
SHEET 1 4016 2292
WIRE -32 96 -80 96
WIRE 96 96 48 96
WIRE 144 96 96 96
WIRE 224 96 144 96
WIRE 288 96 224 96
WIRE 464 96 368 96
WIRE 576 96 464 96
WIRE 976 96 576 96
WIRE 1264 96 1168 96
WIRE 1408 96 1328 96
WIRE 1568 96 1408 96
WIRE 976 160 976 96
WIRE 1168 160 1168 96
WIRE 1408 176 1408 96
WIRE 1568 176 1568 96
WIRE -80 256 -80 96
WIRE 1936 256 1888 256
WIRE 144 272 144 96
WIRE 224 272 224 96
WIRE 464 272 464 96
WIRE 576 272 576 96
WIRE -736 288 -736 240
WIRE -592 288 -736 288
WIRE 976 288 976 240
WIRE 1056 288 976 288
WIRE 1168 288 1168 240
WIRE 1408 288 1408 240
WIRE 1408 288 1168 288
WIRE 1456 288 1408 288
WIRE 1568 288 1568 240
WIRE 1568 288 1520 288
WIRE 1936 304 1936 256
WIRE 1568 320 1568 288
WIRE 1056 336 1056 288
WIRE -592 368 -592 288
WIRE -992 416 -1056 416
WIRE -736 416 -736 288
WIRE -736 416 -768 416
WIRE 1568 432 1568 400
WIRE 1728 432 1888 256
WIRE 1728 432 1568 432
WIRE 1936 432 1936 384
WIRE 1984 432 1936 432
WIRE 2000 432 1984 432
WIRE 1056 448 1056 416
WIRE 1568 464 1568 432
WIRE -992 480 -1024 480
WIRE -592 480 -592 448
WIRE -592 480 -768 480
WIRE -480 480 -592 480
WIRE 976 480 976 288
WIRE 1936 480 1936 432
WIRE -592 496 -592 480
WIRE -480 512 -480 480
WIRE -1168 544 -1184 544
WIRE -992 544 -1168 544
WIRE -736 544 -768 544
WIRE -656 544 -736 544
WIRE 864 560 848 560
WIRE 928 560 864 560
WIRE 1936 592 1936 560
WIRE -1232 608 -1632 608
WIRE -1120 608 -1168 608
WIRE -992 608 -1120 608
WIRE -704 608 -768 608
WIRE -656 608 -656 544
WIRE -592 608 -592 576
WIRE -592 608 -656 608
WIRE -480 608 -480 576
WIRE -480 608 -592 608
WIRE 880 608 848 608
WIRE 976 608 976 576
WIRE 976 608 880 608
WIRE 1056 608 1056 512
WIRE 1056 608 976 608
WIRE -1632 640 -1632 608
WIRE -1232 640 -1232 624
WIRE -704 640 -704 608
WIRE -592 640 -592 608
WIRE 976 640 976 608
WIRE -1024 672 -1024 480
WIRE -736 672 -736 544
WIRE -736 672 -1024 672
WIRE -1056 736 -1056 416
WIRE -704 736 -704 704
WIRE -704 736 -1056 736
WIRE -592 736 -592 704
WIRE -592 736 -704 736
WIRE -1056 752 -1056 736
WIRE -80 752 -80 336
WIRE 144 752 144 336
WIRE 144 752 -80 752
WIRE 224 752 224 336
WIRE 224 752 144 752
WIRE 464 752 464 336
WIRE 464 752 224 752
WIRE 576 752 576 336
WIRE 576 752 464 752
WIRE 976 752 976 720
WIRE 976 752 576 752
WIRE 1168 752 1168 288
WIRE 1568 752 1568 528
WIRE 1568 752 1168 752
WIRE 1936 752 1936 672
WIRE 1936 752 1568 752
WIRE 976 768 976 752
WIRE 1168 768 1168 752
WIRE -1632 800 -1632 720
WIRE -640 976 -640 928
WIRE -880 1088 -1104 1088
WIRE -784 1088 -816 1088
WIRE -640 1088 -640 1056
WIRE -512 1088 -640 1088
WIRE -432 1088 -512 1088
WIRE -400 1088 -432 1088
WIRE 1872 1104 1872 1024
WIRE -640 1136 -640 1088
WIRE -512 1136 -512 1088
WIRE -1312 1152 -1312 1104
WIRE 1808 1152 1776 1152
WIRE -1104 1184 -1104 1088
WIRE -1056 1184 -1104 1184
WIRE -880 1184 -976 1184
WIRE -784 1184 -784 1088
WIRE -784 1184 -816 1184
WIRE 608 1200 448 1200
WIRE 704 1200 688 1200
WIRE 1408 1232 1392 1232
WIRE 1472 1232 1408 1232
WIRE 1680 1232 1568 1232
WIRE 1776 1232 1776 1152
WIRE 1776 1232 1760 1232
WIRE 1872 1232 1872 1200
WIRE 2000 1232 1872 1232
WIRE 2128 1232 2080 1232
WIRE -944 1248 -944 1040
WIRE 1072 1248 1072 1104
WIRE -1168 1264 -1216 1264
WIRE -1104 1264 -1104 1184
WIRE -1104 1264 -1168 1264
WIRE -976 1264 -1104 1264
WIRE 576 1264 576 1056
WIRE 992 1264 976 1264
WIRE 1040 1264 992 1264
WIRE 1872 1264 1872 1232
WIRE -784 1280 -784 1184
WIRE -784 1280 -912 1280
WIRE -640 1280 -640 1200
WIRE -640 1280 -784 1280
WIRE 448 1280 448 1200
WIRE 544 1280 448 1280
WIRE 1168 1280 1104 1280
WIRE 1200 1280 1168 1280
WIRE 1408 1280 1392 1280
WIRE 1472 1280 1408 1280
WIRE 2128 1280 2128 1232
WIRE -1312 1296 -1312 1232
WIRE -1312 1296 -1424 1296
WIRE -1168 1296 -1312 1296
WIRE -1104 1296 -1168 1296
WIRE -976 1296 -1104 1296
WIRE 704 1296 704 1200
WIRE 704 1296 608 1296
WIRE 1040 1296 704 1296
WIRE 256 1312 224 1312
WIRE 384 1312 336 1312
WIRE 544 1312 384 1312
WIRE 1776 1312 1776 1232
WIRE 1808 1312 1776 1312
WIRE 384 1344 384 1312
WIRE 448 1344 448 1280
WIRE -944 1360 -944 1312
WIRE 1072 1360 1072 1312
WIRE 1472 1360 1472 1312
WIRE 576 1376 576 1328
WIRE -1424 1392 -1424 1296
WIRE -1312 1392 -1312 1296
WIRE -624 1408 -768 1408
WIRE 1872 1424 1872 1360
WIRE 2128 1424 2128 1344
WIRE -704 1456 -704 1376
WIRE 384 1456 384 1424
WIRE 448 1456 448 1424
WIRE -768 1472 -768 1408
WIRE -736 1472 -768 1472
WIRE -624 1488 -624 1408
WIRE -624 1488 -672 1488
WIRE -512 1488 -512 1200
WIRE -512 1488 -624 1488
WIRE -1104 1504 -1104 1296
WIRE -976 1504 -1104 1504
WIRE -832 1504 -896 1504
WIRE -736 1504 -832 1504
WIRE -1424 1520 -1424 1456
WIRE -1312 1520 -1312 1456
WIRE -832 1552 -832 1504
WIRE -704 1552 -704 1520
WIRE -832 1680 -832 1616
FLAG 1984 432 vfeed
FLAG 96 96 vcc
FLAG 576 1376 0
FLAG 576 1056 vcc
FLAG 448 1456 0
FLAG 224 1312 ifeed
FLAG 1072 1360 0
FLAG 1072 1104 vcc
FLAG 1472 1360 0
FLAG 1408 1232 vsq
FLAG 2128 1232 vg
FLAG -944 1360 0
FLAG -944 1040 vcc
FLAG -1168 1264 vfeed
FLAG 992 1264 verr
FLAG 1872 1424 0
FLAG 1872 1024 vcc
FLAG 2128 1424 0
FLAG -736 240 vcc
FLAG -1168 544 vsq
FLAG 384 1456 0
FLAG -1312 1520 0
FLAG -1424 1520 0
FLAG -1168 1296 vref
FLAG -640 928 vcc
FLAG -432 1088 verr
FLAG -1632 800 0
FLAG 1168 1280 res
FLAG 1408 1280 res
FLAG -1056 752 0
FLAG -1232 640 0
FLAG -1120 608 ven
FLAG -1312 1104 ven
FLAG 976 768 0
FLAG 864 560 vg
FLAG 880 608 ifeed
FLAG 1168 768 0
FLAG -832 1680 0
FLAG -704 1376 vcc
FLAG -704 1552 0
SYMBOL voltage -80 240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 24 124 Left 2
SYMATTR InstName V1
SYMATTR Value 4.1
SYMBOL cap 448 272 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMATTR SpiceLine Rser=0.8
SYMBOL res 1920 288 R0
SYMATTR InstName R3
SYMATTR Value 6.2Meg
SYMBOL res 1920 464 R0
SYMATTR InstName R4
SYMATTR Value 18k
SYMBOL res 704 1184 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value {Ra}
SYMBOL res 432 1328 R0
SYMATTR InstName R7
SYMATTR Value {Rb}
SYMBOL Digital\\srflop 1520 1184 R0
SYMATTR InstName A2
SYMATTR SpiceLine Vhigh=5 Vlow=0
SYMBOL cap -816 1072 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 150p
SYMBOL cap -816 1168 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL res -960 1168 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 3.3k
SYMBOL npn 1808 1104 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL pnp 1808 1360 M180
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL res 1776 1216 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 1.8k
SYMBOL res 2096 1216 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 10
SYMBOL cap 2112 1280 R0
SYMATTR InstName C5
SYMATTR Value 10n
SYMBOL Misc\\NE555 -880 512 R0
SYMATTR InstName U4
SYMBOL cap -720 640 R0
SYMATTR InstName C6
SYMATTR Value 1µ
SYMBOL cap -608 640 R0
SYMATTR InstName C7
SYMATTR Value 1.5n
SYMBOL res -608 480 R0
SYMATTR InstName R13
SYMATTR Value 22k
SYMBOL res -608 352 R0
SYMATTR InstName R14
SYMATTR Value 1k
SYMBOL schottky -496 512 R0
SYMATTR InstName D4
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 352 1296 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R16
SYMATTR Value {Rb}
SYMBOL res 400 1440 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R15
SYMATTR Value {Ra}
SYMBOL cap 560 272 R0
SYMATTR InstName C10
SYMATTR Value 10n
SYMATTR SpiceLine Rser=10m
SYMBOL res 64 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R17
SYMATTR Value 30m
SYMBOL res -1328 1136 R0
SYMATTR InstName R19
SYMATTR Value 3.3k
SYMBOL cap -1440 1392 R0
SYMATTR InstName C11
SYMATTR Value 100n
SYMBOL cap 128 272 R0
SYMATTR InstName C12
SYMATTR Value 10µ
SYMATTR SpiceLine Rser=0.3
SYMBOL cap 208 272 R0
SYMATTR InstName C13
SYMATTR Value 100n
SYMATTR SpiceLine Rser=10m
SYMBOL schottky -656 1136 R0
SYMATTR InstName D5
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -528 1136 R0
SYMATTR InstName D6
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -656 960 R0
SYMATTR InstName R18
SYMATTR Value 10k
SYMBOL res -992 1520 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 3.3k
SYMBOL voltage -1632 624 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 44 Left 2
SYMATTR Value PWL(0 0 1m 0 1.1m 5)
SYMATTR InstName V2
SYMBOL Digital\\buf1 -1232 544 R0
SYMATTR InstName A1
SYMATTR SpiceLine Vhigh=5 Vlow=0
SYMBOL ind2 960 256 M180
WINDOW 0 37 71 Left 2
WINDOW 3 36 32 Left 2
SYMATTR InstName LP
SYMATTR Value 7µ
SYMATTR Type ind
SYMATTR SpiceLine Rser=0.5
SYMBOL ind2 1184 144 M0
SYMATTR InstName LS
SYMATTR Value 700µ
SYMATTR Type ind
SYMATTR SpiceLine Rser=60
SYMBOL nmos 928 480 R0
SYMATTR InstName M2
SYMATTR Value SP8M51_N
SYMBOL res 960 624 R0
SYMATTR InstName R1
SYMATTR Value 10m
SYMBOL res 1040 320 R0
SYMATTR InstName R2
SYMATTR Value 22
SYMBOL cap 1040 448 R0
SYMATTR InstName C2
SYMATTR Value 8.2n
SYMBOL References\\LT1634-1.25 -1312 1424 R0
SYMATTR InstName U7
SYMBOL cap -848 1552 R0
SYMATTR InstName C8
SYMATTR Value 100n
SYMBOL res 1920 576 R0
SYMATTR InstName R20
SYMATTR Value 1.5k
SYMBOL Comparators\\LT1720 1072 1216 R0
SYMATTR InstName U3
SYMBOL OpAmps\\UniversalOpAmp2 576 1296 R0
SYMATTR InstName U5
SYMBOL OpAmps\\UniversalOpAmp2 -944 1280 R0
SYMATTR InstName U1
SYMBOL OpAmps\\UniversalOpAmp2 -704 1488 R0
SYMATTR InstName U2
SYMBOL ind 272 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 220n
SYMBOL cap 1328 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C16
SYMATTR Value 1n
SYMBOL diode 1424 240 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value RFN10NS8D
SYMBOL cap 1520 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C17
SYMATTR Value 1n
SYMBOL diode 1552 176 R0
SYMATTR InstName D3
SYMATTR Value RFN10NS8D
SYMBOL res 1552 304 R0
SYMATTR InstName R8
SYMATTR Value 22
SYMBOL cap 1552 464 R0
SYMATTR InstName C18
SYMATTR Value 1n
TEXT 3576 552 Left 2 !.tran 0 20m 0
TEXT 136 1488 Left 2 !.param Ra=120k
TEXT 136 1512 Left 2 !.param Rb=1k
TEXT 144 1544 Left 2 ;The AP8567 is the quad version
TEXT 144 1568 Left 2 ;AP8648 for battery-powered and-or low voltage <5V
TEXT 144 1592 Left 2 ;The OP462 is the better version of the AP8567
TEXT -1656 1568 Left 2 ;Any 2.5V zener-voltage reference would do
TEXT -544 1008 Left 2 ;makeshift minimum voltage selector, \nuse a set maximum voltage as a soft start
TEXT -1312 664 Left 2 ;made with two nors
TEXT 1000 112 Left 2 !K1 LP LS 0.998
LINE Normal 1056 256 1056 160
LINE Normal 1072 256 1072 160
LINE Normal 1968 592 1904 672
LINE Normal 1954 599 1968 592
LINE Normal 1968 592 1954 599 2
LINE Normal 1965 605 1968 592