Version 4
SHEET 1 2596 708
WIRE 992 -416 784 -416
WIRE 1808 -416 992 -416
WIRE 1888 -416 1808 -416
WIRE 784 -400 784 -416
WIRE 1440 -400 1312 -400
WIRE 1520 -400 1440 -400
WIRE 1648 -400 1520 -400
WIRE 1440 -384 1440 -400
WIRE 1520 -384 1520 -400
WIRE 1648 -384 1648 -400
WIRE 1888 -336 1888 -416
WIRE 992 -320 992 -416
WIRE 1152 -320 1152 -336
WIRE 1312 -320 1312 -400
WIRE 784 -304 784 -320
WIRE 1440 -304 1440 -320
WIRE 1840 -256 1408 -256
WIRE 1520 -192 1520 -320
WIRE 1520 -192 1408 -192
WIRE 1888 -192 1888 -240
WIRE 1888 -192 1712 -192
WIRE 1968 -192 1888 -192
WIRE 2048 -192 1968 -192
WIRE 2144 -192 2128 -192
WIRE 2160 -192 2144 -192
WIRE 2256 -192 2240 -192
WIRE 2304 -192 2256 -192
WIRE 2352 -192 2304 -192
WIRE 1968 -176 1968 -192
WIRE 2352 -176 2352 -192
WIRE 1888 -144 1888 -192
WIRE 896 -128 880 -128
WIRE 1520 -128 1408 -128
WIRE 1712 -128 1712 -192
WIRE 1712 -128 1520 -128
WIRE 1968 -96 1968 -112
WIRE 2352 -80 2352 -96
WIRE 896 -64 880 -64
WIRE 1840 -64 1408 -64
WIRE 1888 -32 1888 -48
WIRE 2144 0 2144 -192
WIRE 2144 0 1408 0
WIRE 800 64 768 64
WIRE 896 64 864 64
WIRE 2256 64 2256 -192
WIRE 2256 64 1408 64
WIRE 1808 112 1808 -416
WIRE 640 192 592 192
WIRE 752 192 720 192
WIRE 896 192 752 192
WIRE 1760 192 1408 192
WIRE 592 208 592 192
WIRE 752 208 752 192
WIRE 896 256 864 256
WIRE 1648 256 1648 -320
WIRE 1648 256 1408 256
WIRE 1808 256 1808 208
WIRE 1808 256 1744 256
WIRE 1888 256 1808 256
WIRE 1984 256 1888 256
WIRE 2080 256 2064 256
WIRE 2096 256 2080 256
WIRE 2192 256 2176 256
WIRE 2304 256 2304 -192
WIRE 2304 256 2192 256
WIRE 1888 272 1888 256
WIRE 592 288 592 272
WIRE 752 288 752 272
WIRE 2304 288 2304 256
WIRE 2304 288 2240 288
WIRE 1808 304 1808 256
WIRE 2304 304 2304 288
WIRE 800 320 736 320
WIRE 896 320 880 320
WIRE 1648 320 1408 320
WIRE 1744 320 1744 256
WIRE 1744 320 1648 320
WIRE 1888 352 1888 336
WIRE 736 384 736 320
WIRE 896 384 736 384
WIRE 1760 384 1408 384
WIRE 2304 384 2304 368
WIRE 2304 384 2272 384
WIRE 736 400 736 384
WIRE 1808 416 1808 400
WIRE 2304 416 2304 384
WIRE 896 448 816 448
WIRE 2080 448 2080 256
WIRE 2080 448 1408 448
WIRE 736 496 736 480
WIRE 896 512 848 512
WIRE 2192 512 2192 256
WIRE 2192 512 1408 512
WIRE 1040 592 1040 576
WIRE 1264 592 1264 576
WIRE 848 624 848 512
WIRE 2240 624 2240 288
WIRE 2240 624 848 624
WIRE 816 640 816 448
WIRE 2272 640 2272 384
WIRE 2272 640 816 640
FLAG 1888 -32 0
FLAG 1968 -96 0
FLAG 1808 416 0
FLAG 1888 352 0
FLAG 1264 592 0
FLAG 1040 592 0
FLAG 2304 416 0
FLAG 736 496 0
FLAG 592 288 0
FLAG 752 288 0
FLAG 768 64 0
FLAG 784 -304 0
FLAG 2352 -80 0
FLAG 864 256 0
FLAG 1440 -304 0
FLAG 2352 -192 OUT
FLAG 784 -416 IN
SYMBOL NMOS 1840 -336 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 1504 -192 R0
WINDOW 3 33 50 Left 2
WINDOW 0 35 14 Left 2
SYMATTR Value .47µ
SYMATTR InstName C1
SYMBOL nmos 1840 -144 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 1504 -384 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 2032 -176 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1µ
SYMBOL RES 2144 -208 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 1952 -112 M180
WINDOW 0 36 56 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 1760 112 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 1632 256 R0
WINDOW 3 33 46 Left 2
SYMATTR Value .47µ
SYMATTR InstName C2
SYMBOL nmos 1760 304 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 1968 272 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 1µ
SYMBOL schottky 1872 336 M180
WINDOW 0 40 51 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 2288 304 R0
WINDOW 123 28 83 Left 2
SYMATTR Value2 x2
SYMATTR SpiceLine Rser=10m
SYMATTR InstName C3
SYMATTR Value 1000µ
SYMBOL res 720 384 R0
SYMATTR InstName R2
SYMATTR Value 16K
SYMBOL RES 896 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 16K
SYMBOL cap 736 208 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap 576 208 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res 736 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
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 1632 -384 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE 784 -416 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 2080 240 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 2m
SYMBOL POWERPRODUCTS\\LTC1929 1152 128 R0
WINDOW 0 -80 -464 Center 2
WINDOW 3 8 192 Center 2
SYMATTR InstName U1
SYMBOL polcap 1424 -384 R0
SYMATTR InstName C7
SYMATTR Value 10µ
SYMBOL res 2336 -192 R0
SYMATTR InstName Rload
SYMATTR Value .5
TEXT 1808 568 Left 2 !.tran 1m startup