Version 4 SHEET 1 3736 3524 WIRE -1408 -1568 -1568 -1568 WIRE -1056 -1568 -1408 -1568 WIRE -944 -1568 -1056 -1568 WIRE -528 -1568 -944 -1568 WIRE -496 -1568 -528 -1568 WIRE -400 -1568 -416 -1568 WIRE -240 -1568 -400 -1568 WIRE 96 -1568 -144 -1568 WIRE 256 -1568 96 -1568 WIRE 384 -1568 256 -1568 WIRE 608 -1568 384 -1568 WIRE -2128 -1552 -2176 -1552 WIRE -1888 -1552 -2048 -1552 WIRE -1856 -1552 -1888 -1552 WIRE -944 -1552 -944 -1568 WIRE 256 -1552 256 -1568 WIRE 384 -1552 384 -1568 WIRE 608 -1552 608 -1568 WIRE -1056 -1536 -1056 -1568 WIRE 768 -1536 656 -1536 WIRE 768 -1520 768 -1536 WIRE -1344 -1504 -1568 -1504 WIRE -160 -1488 -160 -1520 WIRE -160 -1488 -256 -1488 WIRE 672 -1488 656 -1488 WIRE -944 -1472 -944 -1488 WIRE -1888 -1456 -1888 -1552 WIRE -1856 -1456 -1888 -1456 WIRE 256 -1456 256 -1488 WIRE 384 -1456 384 -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 -1456 WIRE -1056 -1440 -1344 -1440 WIRE 608 -1440 608 -1472 WIRE 768 -1424 768 -1440 WIRE -1216 -1408 -1264 -1408 WIRE -960 -1408 -1216 -1408 WIRE -240 -1408 -960 -1408 WIRE 144 -1408 -144 -1408 WIRE 256 -1408 144 -1408 WIRE 384 -1408 256 -1408 WIRE 256 -1392 256 -1408 WIRE 384 -1392 384 -1408 WIRE -1216 -1376 -1216 -1408 WIRE -1712 -1360 -1712 -1392 WIRE -256 -1328 -256 -1488 WIRE -160 -1328 -160 -1360 WIRE -160 -1328 -256 -1328 WIRE -1216 -1296 -1216 -1312 WIRE 256 -1296 256 -1328 WIRE 384 -1296 384 -1312 WIRE -1120 -1248 -1184 -1248 WIRE -784 -1248 -1120 -1248 WIRE -240 -1248 -784 -1248 WIRE 0 -1248 -144 -1248 WIRE 192 -1248 0 -1248 WIRE 256 -1248 192 -1248 WIRE 384 -1248 256 -1248 WIRE 256 -1232 256 -1248 WIRE 384 -1232 384 -1248 WIRE -1120 -1216 -1120 -1248 WIRE -1408 -1200 -1568 -1200 WIRE -1264 -1200 -1264 -1408 WIRE -1264 -1200 -1408 -1200 WIRE -960 -1200 -960 -1408 WIRE -784 -1200 -784 -1248 WIRE -2128 -1184 -2176 -1184 WIRE -1888 -1184 -2048 -1184 WIRE -1856 -1184 -1888 -1184 WIRE -1264 -1168 -1264 -1200 WIRE -256 -1168 -256 -1328 WIRE -160 -1168 -160 -1200 WIRE -160 -1168 -256 -1168 WIRE -1344 -1136 -1568 -1136 WIRE -1120 -1136 -1120 -1152 WIRE 256 -1136 256 -1168 WIRE 384 -1136 384 -1152 WIRE -528 -1104 -528 -1568 WIRE -400 -1104 -400 -1568 WIRE -1888 -1088 -1888 -1184 WIRE -1856 -1088 -1888 -1088 WIRE -1520 -1072 -1568 -1072 WIRE -1408 -1072 -1408 -1200 WIRE -1408 -1072 -1456 -1072 WIRE -1344 -1072 -1344 -1136 WIRE -1264 -1072 -1264 -1088 WIRE -1264 -1072 -1344 -1072 WIRE 0 -1072 0 -1248 WIRE -960 -1008 -960 -1120 WIRE -848 -1008 -960 -1008 WIRE -608 -1008 -848 -1008 WIRE -256 -1008 -256 -1168 WIRE -256 -1008 -320 -1008 WIRE -1712 -992 -1712 -1024 WIRE -256 -976 -256 -1008 WIRE -784 -928 -784 -1120 WIRE -672 -928 -784 -928 WIRE -608 -928 -672 -928 WIRE -960 -912 -960 -1008 WIRE -784 -912 -784 -928 WIRE -256 -896 -256 -912 WIRE -1408 -848 -1568 -848 WIRE -1184 -848 -1184 -1248 WIRE -1184 -848 -1408 -848 WIRE -672 -848 -672 -928 WIRE -608 -848 -672 -848 WIRE -2128 -832 -2176 -832 WIRE -1888 -832 -2048 -832 WIRE -1856 -832 -1888 -832 WIRE -1184 -832 -1184 -848 WIRE -960 -800 -960 -832 WIRE -784 -800 -784 -832 WIRE -1344 -784 -1568 -784 WIRE -672 -768 -672 -848 WIRE -608 -768 -672 -768 WIRE 0 -768 0 -992 WIRE 0 -768 -320 -768 WIRE -1888 -736 -1888 -832 WIRE -1856 -736 -1888 -736 WIRE -1520 -720 -1568 -720 WIRE -1408 -720 -1408 -848 WIRE -1408 -720 -1456 -720 WIRE -1344 -720 -1344 -784 WIRE -1184 -720 -1184 -752 WIRE -1184 -720 -1344 -720 WIRE -1056 -688 -1056 -1440 WIRE -608 -688 -1056 -688 WIRE 96 -688 96 -1568 WIRE 96 -688 -320 -688 WIRE -1712 -640 -1712 -672 WIRE -1264 -608 -1264 -1072 WIRE -608 -608 -1264 -608 WIRE 144 -608 144 -1408 WIRE 144 -608 -320 -608 WIRE -1184 -528 -1184 -720 WIRE -608 -528 -1184 -528 WIRE 192 -528 192 -1248 WIRE 192 -528 -320 -528 WIRE -848 -496 -848 -1008 WIRE -896 -416 -1312 -416 WIRE -400 -416 -400 -432 WIRE -1312 -400 -1312 -416 WIRE -848 -384 -848 -400 WIRE -528 -384 -528 -432 WIRE -400 -336 -400 -352 WIRE -1312 -304 -1312 -320 FLAG 384 -1456 0 FLAG 608 -1440 0 FLAG 768 -1424 0 FLAG 672 -1488 0 FLAG -2176 -1184 0 FLAG -2176 -832 0 FLAG 384 -1296 0 FLAG 384 -1136 0 FLAG -2176 -1552 0 FLAG -256 -896 0 FLAG -400 -336 0 FLAG -528 -384 0 FLAG -784 -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 -848 -384 0 FLAG -1312 -304 0 FLAG 256 -1456 0 FLAG 256 -1296 0 FLAG 256 -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 3.8 10m 1m 1m 10 20) SYMBOL voltage -2032 -1184 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName V2 SYMATTR Value PULSE(0 3.8 20m 1m 1m 10 20) SYMBOL voltage -2032 -832 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName V3 SYMATTR Value PULSE(0 2.8 27m 1m 1m 10 20) SYMBOL nmos -240 -1520 R270 WINDOW 0 56 50 VTop 2 WINDOW 3 23 94 VRight 2 SYMATTR InstName Q3 SYMATTR Value Si2316DS SYMBOL res -400 -1584 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 50m SYMBOL cap -272 -976 R0 SYMATTR InstName C1 SYMATTR Value .47µ SYMBOL res -16 -1088 R0 SYMATTR InstName R2 SYMATTR Value 4.7K SYMBOL cap -416 -416 R0 SYMATTR InstName C2 SYMATTR Value .22µ SYMBOL res -800 -1216 R0 SYMATTR InstName R3 SYMATTR Value 86.6K SYMBOL res -800 -928 R0 SYMATTR InstName R4 SYMATTR Value 49.9K SYMBOL res -976 -1216 R0 SYMATTR InstName R5 SYMATTR Value 178K 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 PowerProducts\\LT1763-2.5 -1712 -1136 R0 SYMATTR InstName U1 SYMBOL nmos -896 -496 R0 SYMATTR InstName Q4 SYMATTR Value BSS123 SYMBOL voltage -1312 -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 368 -1248 R0 SYMATTR InstName Rload1 SYMATTR Value 70 SYMBOL cap 240 -1552 R0 SYMATTR InstName C9 SYMATTR Value 10µ SYMBOL cap 240 -1392 R0 SYMATTR InstName C10 SYMATTR Value 10µ SYMBOL cap 240 -1232 R0 SYMATTR InstName C11 SYMATTR Value 10µ SYMBOL voltage 768 -1536 R0 SYMATTR InstName V5 SYMATTR Value PULSE(0 1 2 100n 100n 100u 100) SYMBOL sw 608 -1456 R180 WINDOW 0 -6 98 Right 2 WINDOW 3 -12 8 Right 2 SYMATTR InstName S1 SYMATTR Value SSHRT SYMBOL LTC2921-3.3 -464 -768 R0 SYMATTR InstName U2 SYMBOL PowerProducts\\LT1763-3.3 -1712 -1504 R0 SYMATTR InstName U3 SYMBOL PowerProducts\\LT1763-1.5 -1712 -784 R0 SYMATTR InstName U4 SYMBOL res 368 -1408 R0 SYMATTR InstName Rload2 SYMATTR Value 70 SYMBOL res 368 -1568 R0 SYMATTR InstName Rload3 SYMATTR Value 70 SYMBOL nmos -240 -1360 R270 WINDOW 0 56 50 VTop 2 WINDOW 3 23 94 VRight 2 SYMATTR InstName Q1 SYMATTR Value Si2316DS SYMBOL nmos -240 -1200 R270 WINDOW 0 56 50 VTop 2 WINDOW 3 23 94 VRight 2 SYMATTR InstName Q2 SYMATTR Value Si2316DS TEXT 608 -440 Left 2 !.tran 4 TEXT 320 -1000 Left 2 !.model SSHRT SW(Ron=1 Roff=7 Vt=.5 Vh=-.3)