LP2951-03YN

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The LP2951-03YN is a low power, low-dropout linear voltage regulator dedicated to systems which require extreme power efficiency. This voltage regulator provides very tight load and line regulation in the presence of a low dropout voltage, combined with low quiescent current. Its low drop-out voltage and ultra-low quiescent current make the LP2951-03YN ideal for many applications in the field of portable electronics, such as cell phones and personal digital assistants.

The LP2951-03YN operates over an input range of 2.7 V to 6.0 V, and provides a fixed output voltage of 3.0 V. This voltage regulator employs an advanced BiCMOS and Weston design that allows it to operate with a low input-output differential and low quiescent current. The LP2951-03YN delivers up to 400 mA of output current and has a typical drop-out voltage of only 175 mV at full load. In addition, its low-dropout voltage results in lower ground current (as compared to conventional linear regulators) and improved power efficiency.

The LP2951-03YN is available in a 3-pin SOT-23 package, making it a small and low profile device for all kinds of applications. This device is also protected against reverse current, overvoltage, and reversed outputs caused by accidental connection or external noise.

The LP2951-03YN is an ideal Voltage Regulator for designs that require power-efficiency. Its low input-output differential, and low quiescent current make it ideal for applications that require battery-powered operation for a longer period of time. Additionally, its wide input voltage range, low-dropout voltage, and reverse-polarity protection make it the perfect choice for many portable devices like cell phones and PDAs.

The LP2951-03YN employs a three-terminal configuration, consisting of an output (Vout), a ground (GND) and an input (Vin).When an input voltage higher than the regulated output is applied to the device, the output voltage is regulated to 3.0 V. The regulated output voltage is regulated regardless of input voltage, output current, temperature, or the load conditions.

The device achieves its low dropout performance by using an advanced BiCMOS process, and a Weston-design approach. The BiCMOS process used in the LP2951-03YN eliminates the majority of the parasitic components which limit the voltage regulation and the output current. The Weston design approach used in the LP2951-03YN allows for a reduced input-output differential and improves power-supply rejection.

In summary, the LP2951-03YN is an ideal linear voltage regulator for portable electronic applications. It provides a fixed 3.0 V output with very low drop-out voltage and ultra-low quiescent current. It is available in an SOT-23 package and its three-terminal configuration allows for easy design integration into systems. Additionally, the device is protected against reverse-polarity and overvoltage protection which makes it the perfect choice for low power systems.

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