Texas Instruments

LM25574QMT/NOPB  

DC Switching Voltage Regulators

The LM25574QMT/NOPB is a high-efficiency synchronous step-down (buck) regulator from Texas Instruments. This device is designed to provide a stable and regulated output voltage from a wide range of input voltages. It is suitable for a variety of applications, including battery-powered systems, portable devices, and power supplies.

Description:

The LM25574QMT/NOPB is a monolithic, high-efficiency synchronous step-down (buck) regulator that uses a constant-frequency, current-mode architecture. It features a low dropout (LDO) input, which allows it to operate with a very low input voltage, making it ideal for use in battery-powered systems. The device is available in a 20-pin QFN package.

Features:

1. High efficiency: The LM25574QMT/NOPB offers high efficiency of up to 96%, which helps reduce power dissipation and improve system performance.
2. Wide input voltage range: The device can operate with input voltages from 4V to 28V, making it suitable for a wide range of applications.
3. Low dropout input: The low dropout input allows the device to operate with a very low input voltage, which is useful in battery-powered systems.
4. Synchronous rectification: The device uses synchronous rectification, which helps improve efficiency and reduce power dissipation.
5. Programmable soft-start: The soft-start feature helps reduce inrush current and minimize output voltage overshoot during startup.
6. Over-current protection: The device provides over-current protection to prevent damage to the system in case of overload conditions.
7. Thermal shutdown: The thermal shutdown feature protects the device from overheating by disabling the output if the temperature exceeds a certain threshold.

Applications:

1. Portable devices: The LM25574QMT/NOPB is ideal for use in portable devices such as smartphones, tablets, and laptops, where efficiency and low power consumption are critical.
2. Battery-powered systems: The low dropout input and wide input voltage range make this device suitable for use in battery-powered systems, such as drones, robotics, and medical devices.
3. Power supplies: The high efficiency and wide input voltage range make the LM25574QMT/NOPB suitable for use in power supplies for various applications, including industrial, automotive, and consumer electronics.
4. LED lighting: The device can be used in LED lighting applications to provide a stable and regulated output voltage for driving the LEDs.
5. Telecom equipment: The LM25574QMT/NOPB can be used in telecom equipment to provide a stable power supply for sensitive components.

In summary, the LM25574QMT/NOPB is a high-efficiency synchronous step-down regulator from Texas Instruments that offers a wide input voltage range, low dropout input, and various protection features. It is suitable for a variety of applications, including portable devices, battery-powered systems, power supplies, LED lighting, and telecom equipment.

LM25574QMT/NOPB Documents

Download datasheets and manufacturer documentation for LM25574QMT/NOPB

Datasheets :

LM25574MT      

Reference Design Library :

LM25574EVAL: 5V @ 500mA; 7 ~ 42 V in, 82%      

Design Resources :

LM25574-Q1 Design with WEBENCH® Power Designer      

PCN Design/Specification :

Design 22/Feb/2022