Texas Instruments LM317EMP

Part Description

The LM117 and LM317-N series of adjustable 3-pin • Typ. 0.1% Load Regulation positive voltage regulators are capable of supplying in • Typ. 0.01%/V Line Regulation excess of 1.5 A over a 1.25-V to 37-V output range • 1.5-A Output Current and a wide temperature range. They are • Adjustable Output Down to 1.25 V exceptionally easy to use and require only two external resistors to set the output voltage. Further, • Current Limit Constant With Temperature both line and load regulation are better than standard • 80-dB Ripple Rejection fixed regulators. • Short-Circuit Protected Output The LM117 and LM317-N offer full overload • −55°C to 150°C Operating Temperature Range protection such as current limit, thermal overload (LM117) protection and safe area protection. All overload protection circuitry remains fully functional even if the 2 Applications adjustment terminal is disconnected. • Automotive LED Lighting Typically, no capacitors are needed unless the device is situated more than 6 inches from the input filter • Battery Chargers capacitors, in which case an input bypass is needed. • Post Regulation for Switching Supplies An optional output capacitor can be added to improve • Constant Current Regulators transient response. The adjustment terminal can be • Microprocessor Supplies bypassed to achieve very high ripple rejection ratios that are difficult to achieve with standard 3-terminal Typical Application regulators.

 

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