Version 4
SHEET 1 3012 1860
WIRE 1376 896 1200 896
WIRE 1632 896 1376 896
WIRE 1776 896 1632 896
WIRE 1904 896 1776 896
WIRE 2048 896 1904 896
WIRE 2192 896 2048 896
WIRE 2368 896 2192 896
WIRE 1200 912 1200 896
WIRE 1632 912 1632 896
WIRE 2048 912 2048 896
WIRE 1632 992 1632 976
WIRE 1632 992 1488 992
WIRE 2048 992 2048 976
WIRE 2256 992 2048 992
WIRE 1200 1008 1200 992
WIRE 1376 1008 1376 896
WIRE 1488 1008 1488 992
WIRE 1632 1008 1632 992
WIRE 1776 1008 1776 896
WIRE 1904 1008 1904 896
WIRE 2048 1008 2048 992
WIRE 2256 1008 2256 992
WIRE 2368 1008 2368 896
WIRE 1552 1088 1424 1088
WIRE 2320 1088 2128 1088
WIRE 1088 1120 944 1120
WIRE 1184 1120 1088 1120
WIRE 1200 1120 1184 1120
WIRE 1376 1120 1376 1104
WIRE 1376 1120 1280 1120
WIRE 1488 1120 1488 1072
WIRE 1488 1120 1376 1120
WIRE 2256 1120 2256 1072
WIRE 2368 1120 2368 1104
WIRE 2368 1120 2256 1120
WIRE 2464 1120 2368 1120
WIRE 2592 1120 2544 1120
WIRE 2688 1120 2592 1120
WIRE 2800 1120 2688 1120
WIRE 944 1136 944 1120
WIRE 1088 1136 1088 1120
WIRE 1376 1136 1376 1120
WIRE 2368 1136 2368 1120
WIRE 2688 1136 2688 1120
WIRE 2800 1136 2800 1120
WIRE 1488 1152 1488 1120
WIRE 1552 1152 1488 1152
WIRE 2256 1152 2256 1120
WIRE 2256 1152 2128 1152
WIRE 2592 1184 2592 1120
WIRE 1552 1216 1424 1216
WIRE 2320 1216 2128 1216
WIRE 944 1232 944 1216
WIRE 1088 1232 1088 1200
WIRE 2688 1232 2688 1200
WIRE 2800 1232 2800 1216
WIRE 1376 1280 1376 1232
WIRE 1440 1280 1376 1280
WIRE 1552 1280 1520 1280
WIRE 2224 1280 2128 1280
WIRE 2368 1280 2368 1232
WIRE 2368 1280 2304 1280
WIRE 1376 1296 1376 1280
WIRE 2368 1296 2368 1280
WIRE 1280 1344 1264 1344
WIRE 1376 1344 1360 1344
WIRE 1488 1344 1440 1344
WIRE 1552 1344 1488 1344
WIRE 2256 1344 2128 1344
WIRE 2384 1344 2256 1344
WIRE 2480 1344 2448 1344
WIRE 2592 1344 2592 1264
WIRE 2592 1344 2560 1344
WIRE 1264 1408 1264 1344
WIRE 1488 1408 1264 1408
WIRE 1552 1408 1488 1408
WIRE 2256 1408 2128 1408
WIRE 2592 1408 2592 1344
WIRE 2592 1408 2256 1408
WIRE 2592 1424 2592 1408
WIRE 1184 1472 1184 1120
WIRE 1552 1472 1184 1472
WIRE 2192 1472 2192 896
WIRE 2192 1472 2128 1472
WIRE 2592 1520 2592 1504
WIRE 1552 1536 1520 1536
WIRE 2160 1536 2128 1536
WIRE 1552 1600 1520 1600
WIRE 2160 1600 2128 1600
WIRE 1552 1664 1520 1664
WIRE 2160 1664 2128 1664
WIRE 1632 1760 1632 1744
WIRE 1776 1760 1776 1744
WIRE 1904 1760 1904 1744
WIRE 2048 1760 2048 1744
WIRE 1632 1840 1632 1824
WIRE 2048 1840 2048 1824
FLAG 2368 1296 0
FLAG 1632 1840 0
FLAG 2048 1840 0
FLAG 1904 1760 0
FLAG 1776 1760 0
FLAG 2688 1232 0
FLAG 2592 1520 0
FLAG 1376 1296 0
FLAG 2800 1232 0
FLAG 944 1232 0
FLAG 944 1120 OUT1
FLAG 2800 1120 OUT2
FLAG 1200 1008 0
FLAG 1088 1232 0
FLAG 1200 896 IN
SYMBOL POWERPRODUCTS\\LTC1873 1840 1376 R0
SYMATTR InstName U1
SYMBOL NMOS 2320 1008 R0
SYMATTR InstName Q1
SYMATTR Value Si4410DY
SYMBOL nmos 2320 1136 R0
SYMATTR InstName Q2
SYMATTR Value Si4410DY
SYMBOL RES 2320 1264 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 47K
SYMBOL schottky 2032 912 R0
WINDOW 3 28 64 Left 2
SYMATTR Value 1N5818
SYMATTR InstName D1
SYMBOL cap 2240 1008 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL cap 1616 1760 R0
SYMATTR InstName C2
SYMATTR Value .001µ
SYMBOL cap 2032 1760 R0
SYMATTR InstName C3
SYMATTR Value .001µ
SYMBOL cap 2240 1344 R0
WINDOW 0 33 14 Left 2
WINDOW 3 34 48 Left 2
SYMATTR InstName C4
SYMATTR Value 56p
SYMBOL cap 2448 1328 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 330p
SYMBOL res 2576 1328 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 68K
SYMBOL ind 2448 1136 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1µ
SYMBOL res 2576 1168 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 2576 1408 R0
SYMATTR InstName R4
SYMATTR Value 4.75K
SYMBOL nmos 1424 1008 M0
SYMATTR InstName Q3
SYMATTR Value Si4410DY
SYMBOL nmos 1424 1136 M0
SYMATTR InstName Q4
SYMATTR Value Si4410DY
SYMBOL res 1424 1264 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 47K
SYMBOL cap 1472 1008 R0
WINDOW 3 24 58 Left 2
SYMATTR Value 1µ
SYMATTR InstName C6
SYMBOL cap 1472 1344 R0
WINDOW 0 32 13 Left 2
WINDOW 3 33 50 Left 2
SYMATTR InstName C7
SYMATTR Value 39p
SYMBOL cap 1376 1328 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C8
SYMATTR Value 220p
SYMBOL res 1264 1328 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 56K
SYMBOL ind 1296 1136 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 1µ
SYMBOL VOLTAGE 1200 896 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL schottky 1616 912 R0
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL polcap 1072 1136 R0
WINDOW 123 33 63 Left 2
WINDOW 3 37 34 Left 2
SYMATTR Value2 x2
SYMATTR Value 180µ
SYMATTR SpiceLine Rser=.1
SYMATTR InstName C9
SYMBOL polcap 2672 1136 R0
WINDOW 123 21 58 Left 2
WINDOW 3 34 34 Left 2
SYMATTR Value2 x2
SYMATTR Value 180µ
SYMATTR SpiceLine Rser=.1
SYMATTR InstName C10
SYMBOL res 928 1120 R0
SYMATTR InstName Rload1
SYMATTR Value 5
SYMBOL res 2784 1120 R0
SYMATTR InstName Rload2
SYMATTR Value 5
TEXT 2376 1600 Left 2 !.tran 600u startup