High-Efficiency MCP1640BT-I/CHY Boost Converter for Battery-Powered Applications

The demand for efficient and compact power management solutions continues to grow, especially in portable and battery-powered devices. The MCP1640BT-I/CHY, a high-efficiency synchronous boost converter from Microchip Technology, stands out as a robust solution designed to extend battery life and enhance performance in space-constrained applications.

This integrated circuit operates over an input voltage range from 0.35V to 5.5V, making it exceptionally suitable for systems powered by single-cell, dual-cell alkaline or NiMH/NiCd batteries, as well as single-cell Li-ion/Li-polymer batteries. Its ability to start up with an input voltage as low as 0.65V (with 0.35V for operation after startup) is a critical feature for harvesting the last bit of energy from nearly depleted batteries, thereby maximizing runtime.

A key strength of the MCP1640BT-I/CHY is its high efficiency, which can reach up to 96%. This is largely attributed to its integrated synchronous rectification, which eliminates the need for an external Schottky diode, reduces power losses, and simplifies the overall design. The device also features a low quiescent current of just 19 µA (typical), which is vital for applications spending significant time in standby or low-power modes, as it minimizes the drain on the battery when the load is light.

The converter can deliver a continuous output current of up to 350 mA at 3.3V from a single-cell alkaline input, providing ample power for a wide range of applications, including wireless sensors, medical devices, handheld instruments, and other Internet of Things (IoT) endpoints. Its fixed switching frequency of 500 kHz allows for the use of small external inductors and capacitors, contributing to a very compact printed circuit board (PCB) footprint—a crucial advantage for modern miniaturized electronics.

Housed in a tiny 1.2 mm x 1.6 mm 6-Lead UDFN package, the MCP1640BT-I/CHY is engineered for the most space-sensitive designs. Additional built-in protection features such as soft-start, over-current protection (OCP), and thermal shutdown ensure reliable and safe operation under various fault conditions, enhancing the robustness of the end product.

ICGOODFIND: The MCP1640BT-I/CHY is an exceptional high-efficiency boost converter that excels in extending battery life for portable applications. Its ultra-low startup voltage, minuscule form factor, and integrated synchronous rectifier make it a top-tier choice for designers aiming to optimize performance and longevity in power-sensitive devices.

Keywords:

Boost Converter

High Efficiency

Battery-Powered

Low Quiescent Current

Synchronous Rectification