Version 4
SHEET 1 2552 756
WIRE 1328 -432 544 -432
WIRE 768 -400 624 -400
WIRE 944 -400 768 -400
WIRE 1760 -400 944 -400
WIRE 1840 -400 1760 -400
WIRE 624 -384 624 -400
WIRE 1328 -384 1328 -432
WIRE 1328 -384 1200 -384
WIRE 1440 -384 1328 -384
WIRE 1504 -384 1440 -384
WIRE 1616 -384 1504 -384
WIRE 768 -368 768 -400
WIRE 1440 -368 1440 -384
WIRE 1504 -368 1504 -384
WIRE 1616 -368 1616 -384
WIRE 1840 -336 1840 -400
WIRE 944 -320 944 -400
WIRE 1072 -320 1072 -352
WIRE 1200 -320 1200 -384
WIRE 1328 -320 1328 -384
WIRE 624 -288 624 -304
WIRE 1440 -288 1440 -304
WIRE 768 -256 768 -288
WIRE 864 -256 768 -256
WIRE 1792 -256 1408 -256
WIRE 864 -192 832 -192
WIRE 1504 -192 1504 -304
WIRE 1504 -192 1408 -192
WIRE 1840 -192 1840 -240
WIRE 1840 -192 1696 -192
WIRE 1920 -192 1840 -192
WIRE 2016 -192 1920 -192
WIRE 2112 -192 2096 -192
WIRE 2128 -192 2112 -192
WIRE 2224 -192 2208 -192
WIRE 2288 -192 2224 -192
WIRE 2336 -192 2288 -192
WIRE 1920 -176 1920 -192
WIRE 2336 -176 2336 -192
WIRE 1840 -144 1840 -192
WIRE 640 -128 624 -128
WIRE 768 -128 720 -128
WIRE 864 -128 832 -128
WIRE 1504 -128 1408 -128
WIRE 1696 -128 1696 -192
WIRE 1696 -128 1504 -128
WIRE 1920 -96 1920 -112
WIRE 2336 -80 2336 -96
WIRE 704 -64 624 -64
WIRE 864 -64 768 -64
WIRE 1792 -64 1408 -64
WIRE 1840 -32 1840 -48
WIRE 624 0 592 0
WIRE 736 0 704 0
WIRE 864 0 736 0
WIRE 2112 0 2112 -192
WIRE 2112 0 1408 0
WIRE 592 16 592 0
WIRE 736 16 736 0
WIRE 864 64 816 64
WIRE 2224 64 2224 -192
WIRE 2224 64 1408 64
WIRE 592 96 592 80
WIRE 736 96 736 80
WIRE 1760 112 1760 -400
WIRE 864 128 848 128
WIRE 1440 128 1408 128
WIRE 544 160 544 -432
WIRE 624 160 544 160
WIRE 816 160 816 64
WIRE 816 160 704 160
WIRE 848 192 848 128
WIRE 864 192 848 192
WIRE 1712 192 1408 192
WIRE 864 256 848 256
WIRE 1616 256 1616 -304
WIRE 1616 256 1408 256
WIRE 1760 256 1760 208
WIRE 1760 256 1696 256
WIRE 1840 256 1760 256
WIRE 1952 256 1840 256
WIRE 2048 256 2032 256
WIRE 2064 256 2048 256
WIRE 2160 256 2144 256
WIRE 2288 256 2288 -192
WIRE 2288 256 2160 256
WIRE 1840 272 1840 256
WIRE 2288 288 2288 256
WIRE 2288 288 2224 288
WIRE 1760 304 1760 256
WIRE 2288 304 2288 288
WIRE 848 320 848 256
WIRE 864 320 848 320
WIRE 1616 320 1408 320
WIRE 1696 320 1696 256
WIRE 1696 320 1616 320
WIRE 1840 352 1840 336
WIRE 864 384 848 384
WIRE 1712 384 1408 384
WIRE 2288 384 2288 368
WIRE 2288 384 2256 384
WIRE 1760 416 1760 400
WIRE 2288 416 2288 384
WIRE 864 448 848 448
WIRE 2048 448 2048 256
WIRE 2048 448 1408 448
WIRE 864 512 848 512
WIRE 2160 512 2160 256
WIRE 2160 512 1408 512
WIRE 864 576 848 576
WIRE 2224 576 2224 288
WIRE 2224 576 1408 576
WIRE 864 640 848 640
WIRE 2256 640 2256 384
WIRE 2256 640 1408 640
WIRE 1024 720 1024 704
WIRE 1248 720 1248 704
FLAG 1840 -32 0
FLAG 1920 -96 0
FLAG 1760 416 0
FLAG 1840 352 0
FLAG 1248 720 0
FLAG 1024 720 0
FLAG 2288 416 0
FLAG 592 96 0
FLAG 736 96 0
FLAG 624 -64 0
FLAG 624 -288 0
FLAG 2336 -80 0
FLAG 624 -128 0
FLAG 1440 -288 0
FLAG 848 640 0
FLAG 2336 -192 OUT
FLAG 848 384 0
FLAG 848 448 0
FLAG 848 512 0
FLAG 848 576 0
FLAG 624 -400 IN
SYMBOL NMOS 1792 -336 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 1488 -192 R0
WINDOW 3 31 45 Left 2
SYMATTR Value .47µ
SYMATTR InstName C1
SYMBOL nmos 1792 -144 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 1488 -368 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 2000 -176 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1µ
SYMBOL RES 2112 -208 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 1904 -112 M180
WINDOW 0 35 62 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 1712 112 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 1600 256 R0
WINDOW 3 31 51 Left 2
SYMATTR Value .47µ
SYMATTR InstName C2
SYMBOL nmos 1712 304 R0
WINDOW 0 56 4 Left 2
WINDOW 3 60 88 Left 2
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 1936 272 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 1µ
SYMBOL schottky 1824 336 M180
WINDOW 0 34 59 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 2272 304 R0
WINDOW 123 33 83 Left 2
SYMATTR Value2 x2
SYMATTR SpiceLine Rser=10m
SYMATTR Value 1000µ
SYMATTR InstName C3
SYMBOL cap 720 16 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap 576 16 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res 720 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL cap 768 -80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 250p
SYMBOL schottky 1600 -368 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE 624 -400 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 2048 240 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 2m
SYMBOL res 736 -144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL cap 832 -144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C7
SYMATTR Value .01µ
SYMBOL polcap 1424 -368 R0
SYMATTR InstName C8
SYMATTR Value 1µ
SYMBOL RES 784 -384 M0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL POWERPRODUCTS\\LTC3719 1136 192 R0
SYMATTR InstName U1
SYMBOL res 720 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res 2320 -192 R0
SYMATTR InstName Rload
SYMATTR Value .5
TEXT 1480 696 Left 2 !.tran 1m startup