LM5025MTCX Integrated Circuits (ICs)

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The LM5025MTCX is a smart compact DC/DC controller that offers many features that can improve system performance in an environment where wide operating parameters are experienced. LM5025MTCX is a step-down controller that can be used in applications requiring high efficiency, power density and fast transient response. It features a unique current-mode control scheme for improved dynamic response and robust oscillator slope control for improved line and load regulation performance. It includes over-voltage protection and over-current sense point adjustment capability.

Overview

LM5025MTCX is a monolithic, low dropout regulator (LDOR) controller designed to provide low power and high efficiency power solutions. The LDOR controller combines an adaptive on-time control architecture with intelligent power management, allowing the device to be used in a wide range of applications. It is suitable for use with various types of power sources, including DC-DC converters, AC-DC converter, and wall plug adapters. The LM5025MTCX has a wide input voltage operating range from 2.8 V to 38 V and a wide output voltage range from 0.20 V to 6.5 V. It can output current up to ~5A.

Applications

Applications for the LM5025MTCX include: portable and mobile computing, communication equipment, medical equipment, industrial electronics, automotive, consumer products, and other portable or high-power systems. Examples of use include: battery charging, computing voltage regulation, high-efficiency power supplies, wireless power converters, and automotive systems.

Working Principle

The LM5025MTCX is designed to provide a high-efficiency solution with high-precision current control by using a current-mode control architecture. The device has a wide input voltage range and can supply current up to ~5A. Current regulation is achieved by controlling the on-time of power switches. The adaptive on-time control is based on a slope-compensation technique that adjusts the on-time to maintain a constant output current. A digital power-saving technique is also employed in the LM5025MTCX which reduces the input current when the output current is low, thereby decreasing power dissipation.

The LM5025MTCX features adjustable over-voltage protection and over-current sense point adjustment to ensure system safety and reliability. Under over-current and over-voltage conditions, the device will either throttle the switching frequency, or completely shut off the output switch to protect the system from possible damage. The device also includes an integrated soft-start circuit which slowly ramps up the output voltage to reduce in-rush powers and stress on the external components.

In summary, the LM5025MTCX is a compact step-down DC/DC controller offering high efficiency, power density and fast transient response. It is suitable for many applications like battery charging, computing voltage regulation and high-efficiency power supplies. It features a current-mode control architecture, operates with a wide input voltage range, provides adjustable over-voltage, over-current protection, and includes a soft-start circuitry for reduced in-rush power.

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