LM2941LDX/NOPB

LM2941LDX/NOPB Voltage Regulators

The LM2941LDX/NOPB is a low dropout linear regulator available in a SOT-223 package. It is a voltage regulator providing stable and precise output voltage ideal for automobile, digital, and portable devices. The device has an operating temperature range from -40°C to 125°C and provides low output current noise. The LM2941LDX/NOPB is designed to regulate output voltage from 0.8V to 25V, with an output current up to 1.2A. It has a quiescent current of 4mA. It features a low dropout voltage of 0.2V at 1A and 0.38V at 0.5A at 25°C.

Application Field

The LM2941LDX/NOPB regulator is suitable for a broad range of applications such as automotive, communications, industrial, computing, and consumer electronic products. It can be used to regulate the voltage and support the necessary circuitry in power supplies, notebooks, tablets, portable audio players, and mobile phones.

Working Principle

The LM2941LDX/NOPB is a linear voltage regulator that consists of a current limiter, pass voltage control, reference voltage source and a temperature-compensated bandgap reference. The current limiter consists of a PMOS transistor and provides rail-to-rail output current protection. The reference voltage source provides a linear output voltage based on an internal reference voltage and passes only the necessary current to the pass transistor. The temperature compensation of the pass transistor is provided by the bandgap reference voltage.

The LM2941LDX/NOPB has a built-in protection circuit which provides a shut down protection if the input voltage is higher than 35V. It also has a current limit protection with an overcurrent trip level of 0.7A. Additionally, NFET transistors are used as an external sensing feedback loop to accurately limit the average output current.

Advantages

The LM2941LDX/NOPB voltage regulator provides stability and precision in the output voltage. It is designed to meet stringent automotive requirements and can easily be embedded into other system solutions. The regulator has a low drop-out voltage and a maximum output current of 1.2A. It has low noise output current, low quiescent current, and excellent line and load transient response.

The device is also protected from overvoltage and overcurrent conditions. It has a built-in short circuit protection, overvoltage protection and current limiting protection circuits. Its excellent PSRR and temperature compensation make it an ideal choice for many applications.

Conclusion

The LM2941LDX/NOPB voltage regulator is a low dropout linear regulator ideal for a wide range of applications. It has excellent line and load transient response, low quiescent current, low noise output current, and is protected from over-voltage and over-current conditions. With its reliability, stability and precision in the output voltage, the LM2941LDX/NOPB is an excellent choice for many applications.