Version 4 SHEET 1 2064 1464 WIRE 704 -1024 48 -1024 WIRE 48 -960 48 -1024 WIRE 192 -752 128 -752 WIRE 288 -752 192 -752 WIRE 496 -752 352 -752 WIRE 800 -752 496 -752 WIRE 128 -720 128 -752 WIRE 496 -624 496 -752 WIRE 800 -624 800 -752 WIRE 448 -608 352 -608 WIRE 704 -592 704 -1024 WIRE 48 -576 48 -880 WIRE 128 -576 128 -640 WIRE 128 -576 48 -576 WIRE 48 -560 48 -576 WIRE 448 -528 448 -560 WIRE 496 -512 496 -544 WIRE 656 -512 496 -512 WIRE 496 -480 496 -512 WIRE -48 -464 -624 -464 WIRE 64 -464 -48 -464 WIRE 352 -464 352 -608 WIRE 352 -464 128 -464 WIRE 448 -464 352 -464 WIRE 64 -432 -144 -432 WIRE 448 -384 448 -416 WIRE 496 -336 496 -400 WIRE 704 -336 704 -496 WIRE 704 -336 496 -336 WIRE 736 -336 704 -336 WIRE 800 -336 800 -560 WIRE 800 -336 736 -336 WIRE 880 -336 800 -336 WIRE 992 -336 880 -336 WIRE 1200 -336 1072 -336 WIRE 1296 -336 1200 -336 WIRE 1424 -336 1296 -336 WIRE 1536 -336 1424 -336 WIRE 1552 -336 1536 -336 WIRE 496 -304 384 -304 WIRE -48 -272 -48 -464 WIRE 64 -272 -48 -272 WIRE 496 -256 496 -304 WIRE -144 -240 -144 -432 WIRE -144 -240 -976 -240 WIRE 64 -240 -144 -240 WIRE 352 -240 128 -240 WIRE 448 -240 352 -240 WIRE 704 -224 704 -336 WIRE 880 -208 880 -336 WIRE 912 -208 880 -208 WIRE 1056 -208 992 -208 WIRE 1104 -208 1056 -208 WIRE 1200 -208 1200 -336 WIRE 1200 -208 1168 -208 WIRE 1424 -192 1424 -336 WIRE 1552 -192 1552 -336 WIRE 448 -160 448 -192 WIRE 1296 -160 1296 -336 WIRE 496 -144 496 -176 WIRE 656 -144 496 -144 WIRE 496 -112 496 -144 WIRE 352 -96 352 -240 WIRE 448 -96 352 -96 WIRE -624 48 -624 -464 WIRE -384 48 -624 48 WIRE 16 48 -288 48 WIRE 448 48 448 -48 WIRE 496 48 496 -32 WIRE 496 48 448 48 WIRE 704 48 704 -128 WIRE 704 48 496 48 WIRE 1424 48 1424 -128 WIRE 1424 48 704 48 WIRE 1552 48 1552 -112 WIRE 1552 48 1424 48 WIRE 704 64 704 48 WIRE -160 96 -288 96 WIRE 16 272 16 48 WIRE 1056 272 1056 -208 WIRE 1056 272 192 272 WIRE 1296 272 1296 -80 WIRE 1296 272 1056 272 WIRE 256 320 192 320 WIRE -624 368 -624 48 WIRE -592 368 -624 368 WIRE -480 368 -512 368 WIRE -368 368 -416 368 WIRE 1296 368 1296 272 WIRE 256 384 256 320 WIRE -976 400 -976 -240 WIRE -928 400 -976 400 WIRE -160 400 -160 96 WIRE -160 400 -240 400 WIRE -816 416 -864 416 WIRE -768 416 -816 416 WIRE -624 416 -624 368 WIRE -624 416 -688 416 WIRE -544 416 -624 416 WIRE -368 416 -368 368 WIRE -368 416 -464 416 WIRE -304 416 -368 416 WIRE -816 448 -816 416 WIRE -368 464 -368 416 WIRE -160 464 -160 400 WIRE -816 576 -816 512 WIRE -368 576 -368 528 WIRE -368 576 -816 576 WIRE -160 576 -160 528 WIRE -160 576 -368 576 WIRE 16 576 16 352 WIRE 16 576 -160 576 WIRE 256 576 256 464 WIRE 256 576 16 576 WIRE 1296 576 1296 448 WIRE 1296 576 256 576 WIRE 256 592 256 576 FLAG 256 592 0 FLAG 704 64 0 FLAG 48 -560 0 FLAG 192 -752 VCC FLAG 736 -336 SW FLAG 48 -1024 VIN FLAG 1536 -336 VOUT FLAG 448 -528 0 FLAG 448 -384 0 FLAG 448 -160 0 FLAG 384 -304 VCC IOPIN 384 -304 In FLAG 192 320 IN+ IOPIN 192 320 Out FLAG 192 272 IN- IOPIN 192 272 Out SYMBOL voltage 256 368 R0 WINDOW 3 -116 127 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 1 0 300u 1m 1) SYMATTR InstName V1 SYMBOL bv 16 256 R0 WINDOW 3 -141 133 Left 2 SYMATTR Value V=if(V(IN+)>V(IN-),5V,0V) SYMATTR InstName B1 SYMBOL Digital\\srflop -336 0 M0 WINDOW 3 -111 145 Left 2 SYMATTR Value vhigh=5V vlow=0V SYMATTR InstName A1 SYMBOL nmos 656 -592 R0 SYMATTR InstName M1 SYMATTR Value RSR025N05 SYMBOL ind 976 -320 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMBOL cap 1408 -192 R0 SYMATTR InstName C2 SYMATTR Value 50µ SYMBOL res 1536 -208 R0 SYMATTR InstName R3 SYMATTR Value 2 SYMBOL cap 784 -624 R0 SYMATTR InstName C3 SYMATTR Value 0.047µ SYMBOL voltage 48 -976 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V4 SYMATTR Value 12 SYMBOL voltage 128 -736 R0 WINDOW 123 0 0 Left 0 WINDOW 39 20 124 Left 2 SYMATTR SpiceLine Rser=100 SYMATTR InstName V5 SYMATTR Value 5 SYMBOL diode 288 -736 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D3 SYMBOL res 1312 -64 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R5 SYMATTR Value 23k SYMBOL res 1280 464 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R6 SYMATTR Value 10k SYMBOL sw 496 -528 M180 SYMATTR InstName S1 SYMATTR Value SW_DRVH SYMBOL sw 496 -496 R0 SYMATTR InstName S2 SYMATTR Value SW_DRVL SYMBOL nmos 656 -224 R0 WINDOW 3 -33 109 Left 2 SYMATTR Value RSR025N05 SYMATTR InstName M4 SYMBOL sw 496 -160 M180 SYMATTR InstName S3 SYMATTR Value SW_DRVH SYMBOL res -448 400 R90 WINDOW 0 91 60 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 17k SYMBOL cap -384 464 R0 SYMATTR InstName C6 SYMATTR Value 40p SYMBOL Digital\\and 96 -512 R0 WINDOW 3 -114 125 Left 2 SYMATTR Value vhigh=5V vlow=0V SYMATTR InstName A4 SYMBOL Digital\\or 96 -320 R0 WINDOW 3 -112 132 Left 2 SYMATTR Value vhigh=5V vlow=0V SYMATTR InstName A5 SYMBOL sw 496 -128 R0 SYMATTR InstName S4 SYMATTR Value SW_DRVL SYMBOL res -672 400 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 15k SYMBOL cap -832 448 R0 SYMATTR InstName C1 SYMATTR Value 3p SYMBOL Digital\\buf -864 352 M0 WINDOW 3 -1 127 Left 2 SYMATTR Value vhigh=5V vlow=0V SYMATTR InstName A2 SYMBOL cap 1104 -192 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C4 SYMATTR Value 100p SYMBOL res 1008 -224 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 1000k SYMBOL cap -176 464 R0 SYMATTR InstName C5 SYMATTR Value 1p SYMBOL Digital\\schmitt -304 352 R0 SYMATTR InstName A6 SYMATTR SpiceLine vhigh=5V vlow=0V vt=2.5V vh=1.5V rout=1000 SYMBOL diode -416 352 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 -53 32 VTop 2 SYMATTR InstName D1 SYMBOL res -496 352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 300 TEXT -1112 576 Left 2 !.tran 0 0.4m 0.36m TEXT 880 -1016 Left 2 !.Model SW_DRVH SW(Ron=1 Roff=10meg Vt=2.25 vh=0.25) TEXT 880 -984 Left 2 !.Model SW_DRVL SW(Ron=1 Roff=10meg Vt=-2.25 vh=0.25)