Datenblatt-Suchmaschine für elektronische Bauteile |
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LM317LIPKG3 Datenblatt(PDF) 8 Page - Texas Instruments |
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LM317LIPKG3 Datenblatt(HTML) 8 Page - Texas Instruments |
8 / 29 page C1 = 0.1 µF VI 470 W R1 R2 C2 = 1 µF VO Adjustment Output Input LM317L LM317L SLCS144E – JULY 2004 – REVISED OCTOBER 2014 www.ti.com 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information The two output resistors are the only components required to adjust VOUT. 9.2 Typical Application 9.2.1 Design Requirements 1. Use of an input bypass capacitor is recommended if regulator is far from the filter capacitors. 2. For this design example, use the parameters listed in Table 1. 3. Use of an output capacitor improves transient response, but is optional. Table 1. Design Parameters DESIGN PARAMETER EXAMPLE VALUE Input voltage range (Output Voltage + 2.5 V) to 32 V Output voltage VREF × (1 + R2 / R1) + IADJ × R2 9.2.2 Detailed Design Procedure 9.2.2.1 Input Capacitor An input capacitor is not required, but it is recommended, particularly if the regulator is not in close proximity to the power-supply filter capacitors. A 0.1-µF ceramic or 1-µF tantalum provides sufficient bypassing for most applications, especially when adjustment and output capacitors are used. 9.2.2.2 Output Capacitor An output capacitor improves transient response, but it not needed for stability. 9.2.2.3 Feedback Resistors The feedback resistor set the output voltage using Equation 2. VREF × (1 + R2 / R1) + IADJ × R2 (2) 8 Submit Documentation Feedback Copyright © 2004–2014, Texas Instruments Incorporated Product Folder Links: LM317L |
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