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LM7805 Datasheet(PDF) 17 Page - Texas Instruments |
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LM7805 Datasheet(HTML) 17 Page - Texas Instruments |
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17 / 33 page  17 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0K – FEBRUARY 2000 – REVISED JULY 2016 Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated 9 Power Supply Recommendations The LM340 is designed to operate from a wide input voltage up to 35 V. Please refer to electrical characteristics tables for the minimum input voltage required for line/load regulation. If the device is more than six inches from the input filter capacitors, an input bypass capacitor, 0.1 μF or greater, of any type is needed for stability. 10 Layout 10.1 Layout Guidelines Some layout guidelines must be followed to ensure proper regulation of the output voltage with minimum noise. Traces carrying the load current must be wide to reduce the amount of parasitic trace inductance. To improve PSRR, a bypass capacitor can be placed at the OUTPUT pin and must be placed as close as possible to the IC. All that is required for the typical fixed output regulator application circuit is the LM340x/LM78xx IC and a 0.22-µF input capacitor if the regulator is placed far from the power supply filter. A 0.1-µF output capacitor is recommended to help with transient response. In cases when VIN shorts to ground, an external diode must be placed from VOUT to VIN to divert the surge current from the output capacitor and protect the IC. 10.2 Layout Example Figure 27. Layout Example DDPAK |
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Similar Description - LM7805 |
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