Version 4
SHEET 1 2588 728
WIRE 992 -400 752 -400
WIRE 1904 -400 992 -400
WIRE 1984 -400 1904 -400
WIRE 752 -384 752 -400
WIRE 1456 -384 1312 -384
WIRE 1568 -384 1456 -384
WIRE 1712 -384 1568 -384
WIRE 1456 -368 1456 -384
WIRE 1568 -368 1568 -384
WIRE 1712 -368 1712 -384
WIRE 1984 -336 1984 -400
WIRE 992 -320 992 -400
WIRE 1152 -320 1152 -336
WIRE 1312 -320 1312 -384
WIRE 752 -288 752 -304
WIRE 1456 -288 1456 -304
WIRE 896 -256 880 -256
WIRE 1936 -256 1408 -256
WIRE 896 -192 880 -192
WIRE 1568 -192 1568 -304
WIRE 1568 -192 1408 -192
WIRE 1984 -192 1984 -240
WIRE 1984 -192 1776 -192
WIRE 2064 -192 1984 -192
WIRE 2160 -192 2064 -192
WIRE 2256 -192 2240 -192
WIRE 2272 -192 2256 -192
WIRE 2368 -192 2352 -192
WIRE 2432 -192 2368 -192
WIRE 2480 -192 2432 -192
WIRE 2064 -176 2064 -192
WIRE 2480 -176 2480 -192
WIRE 1984 -144 1984 -192
WIRE 528 -128 496 -128
WIRE 896 -128 608 -128
WIRE 1568 -128 1408 -128
WIRE 1776 -128 1776 -192
WIRE 1776 -128 1568 -128
WIRE 2064 -96 2064 -112
WIRE 2480 -80 2480 -96
WIRE 720 -64 688 -64
WIRE 816 -64 800 -64
WIRE 896 -64 880 -64
WIRE 1936 -64 1408 -64
WIRE 1984 -32 1984 -48
WIRE 2256 0 2256 -192
WIRE 2256 0 1408 0
WIRE 800 64 768 64
WIRE 896 64 864 64
WIRE 2368 64 2368 -192
WIRE 2368 64 1408 64
WIRE 1904 112 1904 -400
WIRE 448 192 400 192
WIRE 560 192 528 192
WIRE 896 192 560 192
WIRE 1856 192 1408 192
WIRE 400 208 400 192
WIRE 560 208 560 192
WIRE 688 256 640 256
WIRE 896 256 768 256
WIRE 1712 256 1712 -304
WIRE 1712 256 1408 256
WIRE 1904 256 1904 208
WIRE 1904 256 1840 256
WIRE 1984 256 1904 256
WIRE 2096 256 1984 256
WIRE 2192 256 2176 256
WIRE 2208 256 2192 256
WIRE 2304 256 2288 256
WIRE 2336 256 2304 256
WIRE 2432 256 2432 -192
WIRE 2432 256 2336 256
WIRE 1984 272 1984 256
WIRE 400 288 400 272
WIRE 560 288 560 272
WIRE 2432 288 2432 256
WIRE 2432 288 2368 288
WIRE 1904 304 1904 256
WIRE 2432 304 2432 288
WIRE 784 320 688 320
WIRE 896 320 864 320
WIRE 1712 320 1408 320
WIRE 1840 320 1840 256
WIRE 1840 320 1712 320
WIRE 1984 352 1984 336
WIRE 688 384 688 320
WIRE 896 384 688 384
WIRE 1856 384 1408 384
WIRE 2432 384 2432 368
WIRE 2432 384 2400 384
WIRE 688 400 688 384
WIRE 1904 416 1904 400
WIRE 2432 416 2432 384
WIRE 896 448 832 448
WIRE 2192 448 2192 256
WIRE 2192 448 1408 448
WIRE 688 496 688 480
WIRE 896 512 864 512
WIRE 2304 512 2304 256
WIRE 2304 512 1408 512
WIRE 1040 592 1040 576
WIRE 1264 592 1264 576
WIRE 864 624 864 512
WIRE 2368 624 2368 288
WIRE 2368 624 864 624
WIRE 832 640 832 448
WIRE 2400 640 2400 384
WIRE 2400 640 832 640
WIRE 640 656 640 256
WIRE 2336 656 2336 256
WIRE 2336 656 640 656
FLAG 1984 -32 0
FLAG 2064 -96 0
FLAG 1904 416 0
FLAG 1984 352 0
FLAG 1264 592 0
FLAG 1040 592 0
FLAG 2432 416 0
FLAG 688 496 0
FLAG 400 288 0
FLAG 560 288 0
FLAG 768 64 0
FLAG 752 -288 0
FLAG 2480 -80 0
FLAG 496 -128 0
FLAG 688 -64 0
FLAG 1456 -288 0
FLAG 2480 -192 OUT
FLAG 752 -400 IN
SYMBOL NMOS 1936 -336 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 1552 -192 R0
WINDOW 3 35 44 Left 2
SYMATTR Value .47µ
SYMATTR InstName C1
SYMBOL nmos 1936 -144 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 1552 -368 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 2144 -176 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1µ
SYMBOL RES 2256 -208 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 2048 -112 M180
WINDOW 0 39 58 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 1856 112 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 1696 256 R0
WINDOW 3 31 46 Left 2
SYMATTR Value .47µ
SYMATTR InstName C2
SYMBOL nmos 1856 304 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 2080 272 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 1µ
SYMBOL schottky 1968 336 M180
WINDOW 0 36 62 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 2416 304 R0
WINDOW 40 44 104 Left 2
SYMATTR SpiceLine2 x2
SYMATTR InstName C3
SYMATTR Value 1000µ
SYMATTR SpiceLine Rser=10m
SYMBOL res 672 384 R0
SYMATTR InstName R2
SYMATTR Value 16K
SYMBOL RES 880 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 16K
SYMBOL res 672 272 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 3.3K
SYMBOL cap 544 208 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap 384 208 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res 544 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL cap 864 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 250p
SYMBOL schottky 1696 -368 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE 752 -400 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 2192 240 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 2m
SYMBOL POWERPRODUCTS\\LTC1629-PG 1152 128 R0
WINDOW 0 -80 -464 Center 2
WINDOW 3 8 192 Center 2
SYMATTR InstName U1
SYMBOL res 816 -80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL cap 880 -80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C7
SYMATTR Value .01µ
SYMBOL polcap 1440 -368 R0
SYMATTR InstName C8
SYMATTR Value 1µ
SYMBOL voltage 624 -128 R90
WINDOW 123 32 56 VTop 2
WINDOW 39 32 56 VTop 2
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName V2
SYMATTR Value SINE(.5 .5 200K)
SYMBOL res 2464 -192 R0
SYMATTR InstName Rload
SYMATTR Value .1
TEXT 2152 136 Left 2 !.tran 750u startup