LM2931CT/NOPB

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The LM2931CT/NOPB is a linear voltage regulator from Texas Instruments. It is a three terminal positive voltage regulator with output current up to 1.5A. It provides voltage regulation via on-chip resistors, current limiting, and over-temperature protection. This regulator is ideal for low voltage/low current applications, as well as for applications that require low output noise and good load regulation. It is available in a range of fixed and adjustable output voltages that make it suitable for use in many different applications.

The LM2931CT/NOPB is designed for a wide range of applications including telecom, medical, video and audio systems, computer peripherals, and embedded systems. It is well suited for applications where low voltage and low current regulation, and excellent line and load regulation are required. The LM2931CT/NOPB operates from input voltages as low as 4.5V, and it has an adjustable output voltage range of 1.25 V to 20 V. The on-chiptrimming resistors, current limit, and over-temperature protection help to ensure reliable operation and stable performance even in harsh environment.

LM2931CT/NOPB works through an internal PNP regulator. The output voltage is set by an external resistor divider. When the load current is applied to the regulator, the base-emitter junction of the PNP transistor is forward biased leading to current flow through the transistor. The current flow through the transistor generates a voltage drop across the base-emitter junction which is equal to its Vbe voltage (approx. 0.65V), and hence output voltage is regulated to a value equal to the input voltage minus 0.65V. This method provides very good regulation and line and load regulation. The regulator also has current limiting and over temperature protection. The internal current limit is typically 10mA.

In addition to excellent line and load regulation, the LM2931CT/NOPB also offers temperature stability and low output noise, making it suitable for applications that require low noise and good drift. Due to its low voltage, low current, and noise characteristics, the LM2931CT/NOPB is an excellent choice for low noise audio applications such as audio pre-amps, amplifier power supplies, and other similar applications. The low voltage also makes it well suited for portable devices, handhelds, and battery-powered applications.

The LM2931CT/NOPB is a versatile Linear Voltage Regulator with a wide range of applications for low voltage/low current output voltage regulation. It provides excellent line and load regulation and is suitable for use in a wide range of applications including telecom, medical, video and audio systems, computer peripherals, and embedded systems. It also offers low output noise, current limiting, and over-temperature protection, making it an ideal choice for battery-powered and portable devices.

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