LD2981ABM30TR

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The linear voltage regulator LD2981ABM30TR is a monolithic, three-terminal, adjustable positive voltage regulator. It provides up to 500 mA output current, a dropout voltage of 1.2 V at 150 mA, and a voltage-temperature coefficient of (+/-) 1.5 mV/°C. This regulator is designed for adjustable output voltage from 1.2 V to 30 V.

The LD2981ABM30TR is designed for cost-sensitive applications in which high efficiency is not a prime requirement. The output voltage is adjusted by means of a single external resistor. Connecting this resistor between the adjustment pin (ADJ) and output pin (OUT) allows for a wide range of output voltages. The typical input-output voltage differential is 1.2 V.

The LD2981ABM30TR is ideal for battery-powered systems, providing fixed output voltages with very low noise. This device is well suited for powering moderately sized LCD displays, as the LD2981ABM30TR provides a high current output with less power dissipation in the regulator. This enables the backlight to be powered by the same regulator, while still providing good LCD performance.

The LD2981ABM30TR regulators are very stable and achieve a respectable efficiency mainly due to their low quiescent current (IQ) and low ground current (IG). The device is designed to be simple to use, requiring only two external components to set the output voltage. It incorporates a feature that allows the user to reduce the IQ and IG current by setting the output voltage to 1.2 V (forced PFM).

The LD2981ABM30TR also features a variety of protections, including reverse-battery protection, over-voltage protection, overload protection, and thermal shutdown protection. These features provide a high degree of safety and reliability to applications that require a reliable power supply.

The LD2981ABM30TR voltage regulator is ideally suited for applications requiring high efficiency and low noise, such as in battery-operated systems and systems in which high efficiency is essential. The low quiescent current and low ground current make the LD2981ABM30TR a very efficient regulator; its precise voltage regulation over a wide input-output voltage differential allows for a stable output voltage even in temperature extremes. The wide operating temperature range and numerous protection features make this device a suitable choice for many power applications.

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