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LM317MDCYRG3 Folha de dados(PDF) 11 Page - Texas Instruments |
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LM317MDCYRG3 Folha de dados(HTML) 11 Page - Texas Instruments |
11 / 22 page R1 OUTPUT R2 C adj C OUT 0.1 F 10 F Ground High Frequency Bypass Capacitor High Input Bypass Capacitor Power LM317M www.ti.com SLVS297P – APRIL 2000 – REVISED MARCH 2014 9 Power Supply Recommendations The LM317 is designed to operate from an input voltage supply range between 2.5-V to 40-V greater than the output voltage. 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 • It is recommended that the input terminal be bypassed to ground with a bypass-capacitor. • The optimum placement is closest to the VIN and GND terminals of the device. Care must be taken to minimize the loop area formed by the bypass-capacitor connection, the VIN terminal, and the GND terminal of the IC. • For operation at full rated load, it is recommended to use wide trace lengths to eliminate IR drop and heat dissipation. 10.2 Layout Example Copyright © 2000–2014, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM317M |
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