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LP5904TMX-2.85/NOPB Application Field and Working Principle

Introduction

The LP5904TMX-2.85/NOPB is a 3.3V linear voltage regulator, designed and manufactured by Texas Instruments. It is able to generate a maximum of 2.85V of output voltage from an input voltage ranging from 2.3 to 5.5V, making it a great choice for point-of-load (POL) solutions. The LP5904TMX-2.85/NOPB is a very small, low-profile package (1.4mm x 1.5mm) that delivers a power-dense solution for space-constrained applications where board area and power dissipation are critical.

Application Field

The LP5904TMX-2.85/NOPB is an ideal solution for applications where low power and small area are key design requirements. Its low operating current and low dropout voltage (usually from 350mV to 450mV, depending on the output voltage and load current) make it well suited for a variety of low-power applications, including IoT edge nodes and wearables. The device is also useful for point-of-load (POL) applications, where it regulates voltage for higher-power components such as ASICs, DSPs, FPGAs, and other power-hungry devices. It can also be used as an LDO (low dropout regulator) for applications that require tight voltage tolerances without sacrificing accuracy or power efficiency.

Features and Benefits

The LP5904TMX-2.85/NOPB is designed to offer customers the greatest cost and power savings. It offers both an adjustable output voltage and a fixed output voltage. It also provides up to 100mA of output current, enabling it to power a variety of peripherals and devices. Additionally, it provides high power efficiency, achieving up to 95% efficiency, making it an ideal choice for battery powered applications. The LP5904TMX-2.85/NOPB also features short-circuit protection, thermal protection, and reverse current protection.

Working Principle

The LP5904TMX-2.85/NOPB utilizes a voltage feedback loop to regulate output voltage. The voltage feedback loop includes two components: an error amplifier and a reference voltage. The error amplifier compares the output voltage to the reference voltage, and via negative feedback, the output voltage is adjusted until it matches the reference voltage. The output voltage is then further regulated by a pass transistor that is controlled by the error amplifier. The pass transistor is used to adjust the amount of current flowing through the output stage, thus controlling the output voltage. The device is also designed to have very low output voltage droop, even when under load.

Conclusion

The LP5904TMX-2.85/NOPB is an excellent choice for applications requiring a low-dropout linear regulator. It is a very small package solution that is capable of providing very low power consumption and high power efficiency. With its adjustable output voltage feature and its ability to provide up to 100mA of output current, the LP5904TMX-2.85/NOPB is a great choice for a variety of low-power and regular power applications. Additionally, it provides features such as thermal protection, short-circuit protection, and reverse current protection.

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