Version 4 SHEET 1 1588 1464 WIRE 496 -832 256 -832 WIRE 704 -832 496 -832 WIRE -400 -784 -480 -784 WIRE 256 -768 256 -832 WIRE -1072 -752 -1120 -752 WIRE -912 -752 -1072 -752 WIRE -480 -736 -480 -784 WIRE -400 -720 -400 -784 WIRE -400 -720 -432 -720 WIRE -384 -720 -400 -720 WIRE -1072 -704 -1072 -752 WIRE -384 -672 -432 -672 WIRE 704 -672 704 -832 WIRE 256 -640 256 -688 WIRE -1072 -592 -1072 -624 WIRE -1072 -592 -1248 -592 WIRE -480 -592 -480 -656 WIRE -272 -592 -480 -592 WIRE -192 -592 -272 -592 WIRE -912 -576 -912 -752 WIRE -1248 -560 -1248 -592 WIRE -1072 -560 -1072 -592 WIRE -960 -560 -1072 -560 WIRE -1072 -544 -1072 -560 WIRE -480 -544 -480 -592 WIRE -272 -528 -272 -592 WIRE -1232 -512 -1248 -512 WIRE -960 -512 -992 -512 WIRE 704 -512 704 -592 WIRE 736 -512 704 -512 WIRE 896 -512 736 -512 WIRE 1024 -512 960 -512 WIRE 1152 -512 1024 -512 WIRE 1264 -512 1152 -512 WIRE 1280 -512 1264 -512 WIRE -1296 -480 -1376 -480 WIRE -1232 -464 -1232 -512 WIRE -1232 -464 -1248 -464 WIRE -912 -448 -912 -496 WIRE -848 -448 -912 -448 WIRE -1248 -432 -1248 -464 WIRE -1072 -432 -1072 -480 WIRE -1072 -432 -1248 -432 WIRE -992 -432 -992 -512 WIRE -992 -432 -1072 -432 WIRE -480 -432 -480 -464 WIRE -384 -432 -384 -672 WIRE -384 -432 -480 -432 WIRE -272 -432 -272 -464 WIRE -272 -432 -384 -432 WIRE 496 -432 496 -832 WIRE -1248 -416 -1248 -432 WIRE -480 -416 -480 -432 WIRE 448 -416 352 -416 WIRE 704 -400 704 -512 WIRE 1152 -368 1152 -512 WIRE 1280 -368 1280 -512 WIRE 448 -336 448 -368 WIRE 496 -320 496 -352 WIRE 656 -320 496 -320 WIRE 496 -288 496 -320 WIRE 352 -272 352 -416 WIRE 352 -272 -1264 -272 WIRE 448 -272 352 -272 WIRE 704 -160 704 -304 WIRE 768 -160 704 -160 WIRE 704 -96 704 -160 WIRE 448 48 448 -224 WIRE 496 48 496 -208 WIRE 496 48 448 48 WIRE 704 48 704 -16 WIRE 704 48 496 48 WIRE 1152 48 1152 -304 WIRE 1152 48 704 48 WIRE 1280 48 1280 -288 WIRE 1280 48 1152 48 WIRE 704 64 704 48 WIRE -896 112 -1056 112 WIRE -304 112 -800 112 WIRE -672 160 -800 160 WIRE -96 176 -144 176 WIRE 16 176 -96 176 WIRE 128 176 16 176 WIRE 240 176 128 176 WIRE 400 176 320 176 WIRE -1264 208 -1264 -272 WIRE -1200 208 -1264 208 WIRE -1056 208 -1056 112 WIRE -1056 208 -1136 208 WIRE -672 224 -672 160 WIRE -592 224 -672 224 WIRE -480 224 -528 224 WIRE -304 224 -304 112 WIRE -304 224 -416 224 WIRE -1376 240 -1376 -480 WIRE -1200 240 -1376 240 WIRE -1056 240 -1136 240 WIRE -448 256 -528 256 WIRE -96 272 -96 176 WIRE 16 272 16 176 WIRE 304 272 304 224 WIRE 416 272 304 272 WIRE 496 272 416 272 WIRE 1024 272 1024 -512 WIRE 1024 272 576 272 WIRE -304 304 -304 224 WIRE -1056 384 -1056 240 WIRE -96 384 -96 336 WIRE 128 384 128 176 WIRE 256 384 256 224 WIRE 416 384 416 272 WIRE -448 432 -448 256 WIRE -1056 576 -1056 464 WIRE -448 576 -448 512 WIRE -448 576 -1056 576 WIRE -304 576 -304 384 WIRE -304 576 -448 576 WIRE -96 576 -96 464 WIRE -96 576 -304 576 WIRE 16 576 16 352 WIRE 16 576 -96 576 WIRE 128 576 128 448 WIRE 128 576 16 576 WIRE 256 576 256 464 WIRE 256 576 128 576 WIRE 416 576 416 464 WIRE 416 576 256 576 WIRE 256 592 256 576 FLAG 256 592 0 FLAG -144 176 IN- IOPIN -144 176 Out FLAG 704 64 0 FLAG 256 -640 0 FLAG 400 176 VIN IOPIN 400 176 In FLAG 736 -512 SW FLAG 256 -832 VIN FLAG -384 -720 VS IOPIN -384 -720 In FLAG -480 -416 0 FLAG -192 -592 IN+ IOPIN -192 -592 Out FLAG -1120 -752 VIN IOPIN -1120 -752 In FLAG -1248 -416 0 FLAG -848 -448 IN+ IOPIN -848 -448 Out FLAG 1264 -512 VOUT FLAG 448 -336 0 FLAG 768 -160 VS IOPIN 768 -160 Out SYMBOL g 224 176 R270 SYMATTR InstName G1 SYMATTR Value 750µ 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 res 0 256 R0 SYMATTR InstName R1 SYMATTR Value 1.3Meg SYMBOL cap -112 272 R0 SYMATTR InstName C1 SYMATTR Value 10n SYMBOL res -112 368 R0 SYMATTR InstName R2 SYMATTR Value 15k SYMBOL bv -448 416 R0 WINDOW 3 -199 114 Left 2 SYMATTR Value V=if(V(IN+)>V(IN-),5V,0V) SYMATTR InstName B1 SYMBOL Digital\\srflop -848 64 M0 WINDOW 3 -111 145 Left 2 SYMATTR Value vhigh=5V vlow=0V SYMATTR InstName A1 SYMBOL voltage -304 288 R0 WINDOW 3 -196 104 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 5 0.1u 1n 1n 80n 2u) SYMATTR InstName V3 SYMBOL ind 688 -688 R0 SYMATTR InstName L1 SYMATTR Value 10µ SYMBOL cap 1136 -368 R0 SYMATTR InstName C2 SYMATTR Value 50µ SYMBOL res 1264 -384 R0 SYMATTR InstName R3 SYMATTR Value 20 SYMBOL voltage 256 -784 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V4 SYMATTR Value 5 SYMBOL res 592 256 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 90k SYMBOL res 400 480 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R6 SYMATTR Value 10k SYMBOL g2 -480 -640 R180 SYMATTR InstName G3 SYMATTR Value 2m SYMATTR SpiceLine Ilimit=30u SYMBOL res -496 -560 R0 SYMATTR InstName R7 SYMATTR Value 10k SYMBOL current -1072 -704 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName I1 SYMATTR Value 10µ SYMBOL cap -1088 -544 R0 SYMATTR InstName C5 SYMATTR Value 20p SYMBOL g2 -912 -480 M180 SYMATTR InstName G4 SYMATTR Value 12µ SYMBOL res 688 -112 R0 SYMATTR InstName R8 SYMATTR Value 10m SYMBOL cap -288 -528 R0 SYMATTR InstName C4 SYMATTR Value 1p SYMBOL voltage -1056 368 R0 WINDOW 3 -130 108 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 5 0.1u 1n 1n 1.95u 2u) SYMATTR InstName V6 SYMBOL Digital\\and -1168 160 M0 WINDOW 3 -226 119 Left 2 SYMATTR Value vhigh=5V vlow=0V SYMATTR InstName A2 SYMBOL nmos4 -1296 -560 R0 SYMATTR InstName M3 SYMATTR Value2 l=1u w=10u ad=30p as=30p pd=16u ps=16u m=1 SYMBOL nmos 656 -400 R0 WINDOW 3 -33 109 Left 2 SYMATTR Value RSR025N05 SYMATTR InstName M4 SYMBOL sw 496 -336 M180 SYMATTR InstName S3 SYMATTR Value SW_DRVH SYMBOL sw 496 -304 R0 SYMATTR InstName S4 SYMATTR Value SW_DRVL SYMBOL schottky 896 -496 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value RB055L-30 SYMATTR Description Diode SYMATTR Type diode SYMBOL Digital\\and -560 176 M0 WINDOW 3 -101 119 Left 2 SYMATTR Value vhigh=5V vlow=0V SYMATTR InstName A3 SYMBOL Digital\\inv -416 160 M0 SYMATTR InstName A4 SYMATTR SpiceLine vhigh=5V vlow=0V SYMBOL diode 144 448 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value Dideal TEXT -1376 632 Left 2 !.tran 1m TEXT 816 -816 Left 2 !.Model SW_DRVH SW(Ron=1 Roff=10meg Vt=2.25 vh=0.25) TEXT 816 -784 Left 2 !.Model SW_DRVL SW(Ron=1 Roff=10meg Vt=-2.25 vh=0.25) TEXT -40 144 Left 2 !.ic V(IN-)=0 TEXT -360 656 Left 2 !.model Dideal D(Ron=0.0001 Roff=100G Vfwd=0)