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LM317A

Texas Instruments

Three-Terminal Adjustable Regulator

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM317A SNVSAC2 – MARCH 2015 – ...


Texas Instruments

LM317A

File Download Download LM317A Datasheet


Description
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM317A SNVSAC2 – MARCH 2015 – REVISED OCTOBER 2015 LM317A 1% Accurate Three-Terminal Adjustable Regulator 1 Features 1 Typical 0.005%/V Line Regulation 1% Output Voltage Tolerance 1.5-A Output Current Adjustable Output Down to 1.25 V Current Limit Constant with Temperature 80-dB Ripple Rejection Short-Circuit Protected Output −40°C to 125°C Operating Temperature Range 2 Applications Automotive LED Lighting Battery Chargers Post Regulation for Switching Supplies Constant-Current Regulator Microprocessor Supplies Typical Application *Needed if device is more than 6 inches from filter capacitors. †Optional—improves transient response †† VOUT = 1.25 V æçè1+ R2 R1 ö ÷ø + IADJ (R2 ) 3 Description The LM317A adjustable 3-terminal, positive-voltage regulators are capable of supplying current in excess of 1.5 A over a 1.25-V to 37-V output range and provide 1% output-voltage accuracy. The LM317A device is available in an SOT-223 package, which makes it ideal for space-constrained applications that require high-performance regulation. The device is exceptionally easy to use and requires only two external resistors to set the output voltage. Both line regulation and load regulation are better achieved with the LM317A device than with standard fixed regulators. The LM317A offers full overload protection such as current limit, thermal-overload protection, and saf...




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