MCP1623T-I/CHY: A High-Efficiency, Fixed-Frequency Step-Up DC-DC Converter

The MCP1623T-I/CHY is a highly integrated, fixed-frequency synchronous step-up (boost) DC-DC converter from Microchip Technology, engineered to deliver exceptional performance in power-constrained applications. Designed to operate with input voltages as low as 0.65V, this converter is an ideal solution for harnessing energy from single or dual-cell alkaline, NiMH, or NiCd batteries, as well as from solar panels and other low-voltage sources.

A key feature of the MCP1623T-I/CHY is its high efficiency, which reaches up to 96%. This is largely achieved through the integration of a synchronous rectifier, which eliminates the power loss typically associated with an external Schottky diode. This not only improves overall efficiency but also reduces the external component count and board space, simplifying design and lowering the total solution cost. The device operates at a fixed switching frequency of 500 kHz, which provides predictable noise characteristics and allows for easier filtering of electromagnetic interference (EMI), a critical consideration in sensitive electronic systems.

The converter is designed to deliver a regulated output voltage, which can be set within a range of 1.8V to 5.5V using external feedback resistors. Its ability to start up and operate with an input voltage as low as 0.35V (with a 10mA load) makes it exceptionally capable in scenarios where the available voltage is very scarce. Furthermore, the device includes true load disconnect during shutdown. This feature isolates the output from the input, preventing any battery drain when the system is powered down, which is paramount for extending battery life in portable devices.

Housed in a compact 5-pin SOT-23 package, the MCP1623T-I/CHY offers a compelling combination of high performance and a minimal footprint. Typical applications include powering microcontrollers, sensors, and wireless communication modules in a wide array of portable and battery-powered devices such as remote controls, medical sensors, smart watches, and energy harvesting systems.

ICGOOODFIND: The MCP1623T-I/CHY stands out as an ultra-low-voltage starter and high-efficiency power solution, perfectly balancing performance, size, and cost for space-constrained, battery-dependent designs.

Keywords:

1. Step-Up Converter

2. High Efficiency

3. Low Input Voltage

4. Synchronous Rectification

5. Fixed Frequency