Version 4 SHEET 1 3736 3524 WIRE -1408 -1568 -1568 -1568 WIRE -1056 -1568 -1408 -1568 WIRE -944 -1568 -1056 -1568 WIRE -480 -1568 -944 -1568 WIRE -448 -1568 -480 -1568 WIRE -352 -1568 -368 -1568 WIRE -192 -1568 -352 -1568 WIRE 176 -1568 -96 -1568 WIRE 336 -1568 176 -1568 WIRE 432 -1568 336 -1568 WIRE 576 -1568 432 -1568 WIRE -2128 -1552 -2176 -1552 WIRE -1888 -1552 -2048 -1552 WIRE -1856 -1552 -1888 -1552 WIRE -944 -1552 -944 -1568 WIRE 336 -1552 336 -1568 WIRE 432 -1552 432 -1568 WIRE 576 -1552 576 -1568 WIRE -1056 -1536 -1056 -1568 WIRE 736 -1536 624 -1536 WIRE 736 -1520 736 -1536 WIRE -1344 -1504 -1568 -1504 WIRE -112 -1488 -112 -1520 WIRE -112 -1488 -208 -1488 WIRE 640 -1488 624 -1488 WIRE -944 -1472 -944 -1488 WIRE -1888 -1456 -1888 -1552 WIRE -1856 -1456 -1888 -1456 WIRE 336 -1456 336 -1488 WIRE 432 -1456 432 -1472 WIRE 576 -1456 576 -1472 WIRE -1520 -1440 -1568 -1440 WIRE -1408 -1440 -1408 -1568 WIRE -1408 -1440 -1456 -1440 WIRE -1344 -1440 -1344 -1504 WIRE -1056 -1440 -1056 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-352 -352 WIRE -1360 -304 -1360 -320 FLAG 432 -1456 0 FLAG 576 -1456 0 FLAG 736 -1424 0 FLAG 640 -1488 0 FLAG -2176 -1184 0 FLAG -2176 -832 0 FLAG 432 -1296 0 FLAG 432 -1136 0 FLAG -2176 -1552 0 FLAG -208 -896 0 FLAG -352 -336 0 FLAG -480 -416 0 FLAG -736 -800 0 FLAG -960 -800 0 FLAG -944 -1472 0 FLAG -1712 -1360 0 FLAG -1712 -992 0 FLAG -1216 -1296 0 FLAG -1120 -1136 0 FLAG -1712 -640 0 FLAG -16 -768 _RESET FLAG -848 -384 0 FLAG -1360 -304 0 FLAG 336 -1456 0 FLAG 336 -1296 0 FLAG 336 -1136 0 SYMBOL voltage -2032 -1552 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(0 2.8 10m 1m 1m 10 20) SYMBOL voltage -2032 -1184 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value PULSE(0 2.5 20m 1m 1m 10 20) SYMBOL voltage -2032 -832 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value PULSE(0 2.5 27m 1m 1m 10 20) SYMBOL nmos -192 -1520 R270 WINDOW 0 58 51 VTop 2 WINDOW 3 23 88 VRight 2 SYMATTR InstName Q1 SYMATTR Value Si2316DS SYMBOL res -352 -1584 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 50m SYMBOL cap -224 -976 R0 SYMATTR InstName C1 SYMATTR Value .47µ SYMBOL res 48 -1088 R0 SYMATTR InstName R2 SYMATTR Value 4.7K SYMBOL cap -368 -416 R0 SYMATTR InstName C2 SYMATTR Value .22µ SYMBOL res -752 -1216 R0 SYMATTR InstName R3 SYMATTR Value 86.6K SYMBOL res -752 -928 R0 SYMATTR InstName R4 SYMATTR Value 49.9K SYMBOL res -976 -1216 R0 SYMATTR InstName R5 SYMATTR Value 113K SYMBOL res -976 -928 R0 SYMATTR InstName R6 SYMATTR Value 49.9K SYMBOL res -1072 -1552 R0 SYMATTR InstName R7 SYMATTR Value 100 SYMBOL res -1280 -1184 R0 SYMATTR InstName R8 SYMATTR Value 100 SYMBOL res -1200 -848 R0 SYMATTR InstName R9 SYMATTR Value 100 SYMBOL cap -960 -1552 R0 SYMATTR InstName C3 SYMATTR Value 10µ SYMBOL cap -1456 -1456 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value .01µ SYMBOL cap -1456 -1088 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value .01µ SYMBOL cap -1232 -1376 R0 SYMATTR InstName C6 SYMATTR Value 10µ SYMBOL cap -1136 -1216 R0 SYMATTR InstName C7 SYMATTR Value 10µ SYMBOL cap -1456 -736 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C8 SYMATTR Value .01µ SYMBOL nmos -896 -496 R0 SYMATTR InstName Q2 SYMATTR Value BSS123 SYMBOL voltage -1360 -416 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V4 SYMATTR Value PULSE(0 5 2.5 100n 100n 200u 100) SYMBOL res 416 -1248 R0 SYMATTR InstName Rload1 SYMATTR Value 70 SYMBOL cap 320 -1552 R0 SYMATTR InstName C9 SYMATTR Value 10µ SYMBOL cap 320 -1392 R0 SYMATTR InstName C10 SYMATTR Value 10µ SYMBOL cap 320 -1232 R0 SYMATTR InstName C11 SYMATTR Value 10µ SYMBOL voltage 736 -1536 R0 SYMATTR InstName V5 SYMATTR Value PULSE(0 1 2 100n 100n 100u 100) SYMBOL sw 576 -1456 R180 WINDOW 0 -14 112 Right 2 WINDOW 3 -24 2 Right 2 SYMATTR InstName S1 SYMATTR Value SSHRT SYMBOL LTC2921-2.5 -416 -768 R0 SYMATTR InstName U1 SYMBOL PowerProducts\\LT1763-2.5 -1712 -1504 R0 SYMATTR InstName U2 SYMBOL PowerProducts\\LT1763-1.8 -1712 -1136 R0 SYMATTR InstName U3 SYMBOL PowerProducts\\LT1763-1.5 -1712 -784 R0 SYMATTR InstName U4 SYMBOL nmos -192 -1360 R270 WINDOW 0 58 51 VTop 2 WINDOW 3 23 88 VRight 2 SYMATTR InstName Q3 SYMATTR Value Si2316DS SYMBOL nmos -192 -1200 R270 WINDOW 0 58 51 VTop 2 WINDOW 3 23 88 VRight 2 SYMATTR InstName Q4 SYMATTR Value Si2316DS SYMBOL res 416 -1408 R0 SYMATTR InstName Rload2 SYMATTR Value 70 SYMBOL res 416 -1568 R0 SYMATTR InstName Rload3 SYMATTR Value 70 TEXT 624 -440 Left 2 !.tran 4 TEXT 320 -1032 Left 2 !.model SSHRT SW(Ron=1 Roff=7 Vt=.5 Vh=-.3)