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SPX1117T-L-3-3 Datasheet(PDF) 8 Page - Exar Corporation |
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SPX1117T-L-3-3 Datasheet(HTML) 8 Page - Exar Corporation |
8 / 11 page S SP PX X1 11 11 17 7 8 80 00 0m mA A L Lo ow w D Drro op po ou utt V Vo olltta ag ge e R Re eg gu ulla atto orr © 2011 Exar Corporation 8/11 Rev. 2.1.0 PRE-BIAS OUTPUT VOLTAGE START-UP The SPX1117 is not intended for operations requiring start-up into a pre-biased load. Proper discharge of the output voltage is recommended prior of turning on the device through the application of the input voltage. LAYOUT CONSIDERATIONS Parasitic line resistance can degrade local regulation. In order to avoid this, connect R1 directly to VOUT as illustrated in figure 25. For the same reason R2 should be connected to the negative side of the load. Fig. 21: Current Cource Fig. 22:Typical Adjustable Regulator Fig. 23: Improving Ripple Rejection Fig. 24: 5V Regulator with Shutdown Fig. 25: Recommended Connections for Best Results PC Board mm2 Topside Copper mm2 Backside Copper mm2 Thermal Resistance Jct to amb. °C/W 2500 2500 2500 46 2500 1250 2500 47 2500 950 2500 49 2500 2500 0 51 2500 1800 0 53 1600 600 1600 55 2500 1250 0 58 2500 915 0 59 1600 600 0 67 900 240 900 72 900 240 0 85 Table 1 |
Similar Part No. - SPX1117T-L-3-3 |
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Similar Description - SPX1117T-L-3-3 |
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