LP2989ILDX-2.8/NOPB

Introduction

LP2989ILDX-2.8/NOPB is a voltage regulator with packaged in a small 8-lead TSOT-23 package, designed and developed by Texas Instruments. Its output voltage can be adjusted up and down in the range of 1.7V to1.9V. It has the flexibility to regulate low voltage levels, avoiding the need for external components.

Application Field

The output voltage range of LP2989ILDX-2.8/NOPB is suitable as a power supply voltage for applications requiring low power, such as memory and logic systems. This voltage regulator can also be used to provide a clean supply voltage and EMI noise filtering to sensitive analog circuits, such as touchscreens. In addition, it is widely used in home entertainment systems, including the latest Smart TV and digital video products.

Working Principle

LP2989ILDX-2.8/NOPB is designed as a linear voltage regulator whose internal circuitry consists of a voltage reference, an error amplifier, a comparator and a series of pass elements. The voltage reference is an integral part of an error amplifier and provides a constant reference voltage for the comparator to compare against the actual output voltage.

When the output voltage diverges from the reference voltage, the comparator triggers the error amplifier. The signal is then amplified and compared against the reference, producing an error signal that is a function of the output voltage. This error signal is applied to the pass elements which adjust the output voltage to match the reference. The pass elements are designed to regulate the output voltage with minimal heat generation, resulting is a highly efficient voltage regulator, capable of supplying up to 150mA current.

Conclusion

LP2989ILDX-2.8/NOPB is a linear voltage regulator designed and manufactured by Texas Instruments, specifically for low voltage applications. It provides an output voltage of 1.7V to 1.9V with an adjustable range and can supply up to 150mA of current output. Its operating principle is based on the comparison of the reference voltage and the actual output voltage. It is ideal for powering memory and logic systems and filtering EMI noise in sensitive analog circuits.