High-Efficiency MCP1642B-ADJI/MS Step-Up Converter for Battery-Powered Applications

The growing demand for portable and battery-powered devices has intensified the need for efficient power management solutions. In such applications, maintaining stable output voltage while maximizing battery life is critical. The MCP1642B-ADJI/MS, a synchronous step-up (boost) DC-DC converter from Microchip Technology, addresses these challenges with exceptional efficiency and compact design.

This converter is engineered to operate with input voltages as low as 0.35V, making it ideal for systems powered by single or dual-cell alkaline, NiMH, or NiCd batteries, as well as single-cell lithium-ion batteries where the voltage can drop below the required output level during discharge. Its ability to start up and run with such a low input voltage ensures that nearly all available energy from the battery is utilized, extending operational life and reducing the frequency of battery replacement or recharging.

A standout feature of the MCP1642B is its high efficiency, which can reach up to 96%. This is achieved through integrated synchronous rectification, which minimizes power loss that typically occurs with an external diode in asynchronous boost converters. The device operates at a fixed frequency of 500 kHz, allowing for the use of small external inductors and capacitors. This not only optimizes performance but also minimizes the overall solution size, making it perfect for space-constrained applications like wearable electronics, medical sensors, and IoT nodes.

The adjustable output version (ADJI) offers designers flexibility, allowing the output voltage to be set from 1.8V to 5.5V via an external resistor divider. This programmability ensures compatibility with a wide range of microcontrollers, sensors, and other digital loads. Furthermore, the converter includes essential features such as internal soft-start to limit inrush current, over-current protection, and thermal shutdown, enhancing the reliability and robustness of the end product.

Its MSOP-8 package offers a low-profile footprint, crucial for modern portable devices where board real estate is at a premium. The combination of high efficiency, a wide input voltage range, and integrated protection features makes the MCP1642B-ADJI/MS a superior choice for powering next-generation portable applications.

ICGOOODFIND: The MCP1642B-ADJI/MS is a highly efficient, compact, and versatile synchronous boost converter that excels in extracting maximum energy from batteries, making it an indispensable component for designing longer-lasting and reliable portable devices.

Keywords:

High Efficiency

Boost Converter

Battery-Powered

Low Input Voltage

Compact Design