Version 4
SHEET 1 2608 708
WIRE 816 -416 720 -416
WIRE 992 -416 816 -416
WIRE 1856 -416 992 -416
WIRE 1936 -416 1856 -416
WIRE 720 -400 720 -416
WIRE 1456 -400 1312 -400
WIRE 1552 -400 1456 -400
WIRE 1696 -400 1552 -400
WIRE 816 -384 816 -416
WIRE 1456 -384 1456 -400
WIRE 1552 -384 1552 -400
WIRE 1696 -384 1696 -400
WIRE 1936 -336 1936 -416
WIRE 992 -320 992 -416
WIRE 1152 -320 1152 -352
WIRE 1312 -320 1312 -400
WIRE 720 -304 720 -320
WIRE 1456 -304 1456 -320
WIRE 816 -256 816 -304
WIRE 896 -256 816 -256
WIRE 1888 -256 1408 -256
WIRE 1552 -192 1552 -320
WIRE 1552 -192 1408 -192
WIRE 1936 -192 1936 -240
WIRE 1936 -192 1760 -192
WIRE 2016 -192 1936 -192
WIRE 2112 -192 2016 -192
WIRE 2208 -192 2192 -192
WIRE 2224 -192 2208 -192
WIRE 2320 -192 2304 -192
WIRE 2368 -192 2320 -192
WIRE 2416 -192 2368 -192
WIRE 2016 -176 2016 -192
WIRE 2416 -176 2416 -192
WIRE 1936 -144 1936 -192
WIRE 896 -128 864 -128
WIRE 1552 -128 1408 -128
WIRE 1760 -128 1760 -192
WIRE 1760 -128 1552 -128
WIRE 2016 -96 2016 -112
WIRE 2416 -80 2416 -96
WIRE 896 -64 864 -64
WIRE 1888 -64 1408 -64
WIRE 1936 -32 1936 -48
WIRE 2208 0 2208 -192
WIRE 2208 0 1408 0
WIRE 800 64 768 64
WIRE 896 64 864 64
WIRE 2320 64 2320 -192
WIRE 2320 64 1408 64
WIRE 1856 112 1856 -416
WIRE 624 192 576 192
WIRE 752 192 704 192
WIRE 896 192 752 192
WIRE 1808 192 1408 192
WIRE 576 208 576 192
WIRE 752 208 752 192
WIRE 1696 256 1696 -320
WIRE 1696 256 1408 256
WIRE 1856 256 1856 208
WIRE 1856 256 1792 256
WIRE 1936 256 1856 256
WIRE 2048 256 1936 256
WIRE 2144 256 2128 256
WIRE 2160 256 2144 256
WIRE 2256 256 2240 256
WIRE 2368 256 2368 -192
WIRE 2368 256 2256 256
WIRE 1936 272 1936 256
WIRE 576 288 576 272
WIRE 752 288 752 272
WIRE 2368 288 2368 256
WIRE 2368 288 2304 288
WIRE 1856 304 1856 256
WIRE 2368 304 2368 288
WIRE 800 320 736 320
WIRE 896 320 880 320
WIRE 1696 320 1408 320
WIRE 1792 320 1792 256
WIRE 1792 320 1696 320
WIRE 1936 352 1936 336
WIRE 736 384 736 320
WIRE 896 384 736 384
WIRE 1808 384 1408 384
WIRE 2368 384 2368 368
WIRE 2368 384 2336 384
WIRE 736 400 736 384
WIRE 2368 400 2368 384
WIRE 1856 416 1856 400
WIRE 896 448 816 448
WIRE 2144 448 2144 256
WIRE 2144 448 1408 448
WIRE 736 496 736 480
WIRE 896 512 848 512
WIRE 2256 512 2256 256
WIRE 2256 512 1408 512
WIRE 1040 592 1040 576
WIRE 1264 592 1264 576
WIRE 848 624 848 512
WIRE 2304 624 2304 288
WIRE 2304 624 848 624
WIRE 816 640 816 448
WIRE 2336 640 2336 384
WIRE 2336 640 816 640
FLAG 1936 -32 0
FLAG 2016 -96 0
FLAG 1856 416 0
FLAG 1936 352 0
FLAG 1264 592 0
FLAG 1040 592 0
FLAG 2368 400 0
FLAG 736 496 0
FLAG 576 288 0
FLAG 752 288 0
FLAG 768 64 0
FLAG 720 -304 0
FLAG 2416 -80 0
FLAG 1456 -304 0
FLAG 2416 -192 OUT
FLAG 720 -416 IN
SYMBOL NMOS 1888 -336 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 1536 -192 R0
WINDOW 3 30 49 Left 2
SYMATTR Value .47µ
SYMATTR InstName C1
SYMBOL nmos 1888 -144 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 1536 -384 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 2096 -176 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1µ
SYMBOL RES 2208 -208 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 2000 -112 M180
WINDOW 0 37 55 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 1808 112 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 1680 256 R0
WINDOW 3 33 48 Left 2
SYMATTR Value .47µ
SYMATTR InstName C2
SYMBOL nmos 1808 304 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 2032 272 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 1µ
SYMBOL schottky 1920 336 M180
WINDOW 0 38 58 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 2352 304 R0
WINDOW 123 30 61 Left 2
WINDOW 3 39 36 Left 2
SYMATTR Value2 x2
SYMATTR Value 1000µ
SYMATTR SpiceLine Rser=10m
SYMATTR InstName C3
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 res 800 -400 R0
SYMATTR InstName R4
SYMATTR Value 3.3K
SYMBOL POWERPRODUCTS\\LTC1929-PG 1152 128 R0
WINDOW 0 -80 -464 Center 2
WINDOW 3 8 192 Center 2
SYMATTR InstName U1
SYMBOL cap 736 208 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap 560 208 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res 720 176 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 1680 -384 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE 720 -416 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 2144 240 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 2m
SYMBOL polcap 1440 -384 R0
SYMATTR InstName C7
SYMATTR Value 10µ
SYMBOL res 2400 -192 R0
SYMATTR InstName Rload
SYMATTR Value .5
TEXT 1856 568 Left 2 !.tran 1m startup