LM2941S/NOPB

The LM2941S/NOPB is a low dropout (LDO) linear voltage regulator. It is designed to deliver accurate output voltage over a wide temperature range. It offers stable and low-noise operation without requiring additional components. The LM2941S/NOPB is an ideal choice for applications requiring higher load-currents, such as portable electronics, cellular phones, digital cameras, hand-held devices, and other battery-operated products.

The LM2941S/NOPB is a dual-output LDO regulator. It provides two adjustable output voltages, 1.225V and 2.5V. It has a maximum input voltage of 6.5V and a maximum output current of 500mA. The LM2941S/NOPB has a built-in protection circuit which prevents over-current and thermal protection. It also features reverse-battery protection and a wide-operating temperature range (−40°C to 125°C).

The LM2941S/NOPB offers superior performance in terms of transient response and line/load regulation. The output voltage is stable and unaffected by changes in temperature and load. Its low dropout voltage makes it suitable for applications where a minimum headroom is essential. The LM2941S/NOPB also features a power-saving mode that reduces the quiescent current (Iq) to 250μA when the output current is less than 5mA and no load is applied to the output.

The working principle of the LM2941S/NOPB is based on a standard linear voltage regulator circuit. It consists of an Operational Amplifier (Opamp), a series pass transistor, and a shunt regulator. The output voltage is determined by comparing the feedback voltage of the Opamp to a reference voltage. The differential voltage is then amplified and applied to the series pass transistor, which acts as a variable resistor that adjusts the current flowing through the load. The control loop maintains the output voltage at the desired level.

The LM2941S/NOPB is designed for use in a variety of applications. It is suitable for low-noise and battery-powered systems, as well as systems that require precise voltage regulation. Further, it can deliver up to 500mA of current, making it a good choice for applications requiring higher load-currents, like portable electronics, cellular phones, digital cameras, and hand-held devices. The LM2941S/NOPB is housed in a SOT-23-5 and has maintained a long service life with excellent performance.