Microchip MCP1702T-1802E/CB: A 180mA Low Quiescent Current LDO Voltage Regulator

In the realm of power management for battery-operated and low-power devices, efficiency is paramount. The Microchip MCP1702T-1802E/CB stands out as a robust 180mA low-dropout (LDO) voltage regulator engineered specifically for applications where power conservation is critical. This device delivers a fixed 1.8V output from a wide input voltage range of 2.3V to 6.0V, making it exceptionally versatile for a variety of systems powered by single-cell lithium-ion batteries, multiple alkaline cells, or other common power sources.

A defining characteristic of the MCP1702 is its remarkably low quiescent current, which is typically just 1.6 µA. This ultra-low current draw during operation significantly minimizes the power lost to the regulator itself, directly translating to extended battery life for portable products like IoT sensors, wearable electronics, and medical monitoring devices. Furthermore, its low dropout voltage—typically 178 mV at the full 180mA load—ensures stable operation even as the input voltage approaches the output level, maximizing the usable energy from a draining battery.

The regulator is designed for stability with a small, space-saving 1.0 µF ceramic output capacitor, which reduces both the solution footprint and overall cost. It also incorporates key protection features such as internal current limiting and thermal shutdown, safeguarding both the regulator and the downstream circuitry from fault conditions. Housed in a compact SOT-23-3 package, the MCP1702T-1802E/CB offers a superior combination of performance, size, and reliability for power-sensitive designs.

ICGOOODFIND: The MCP1702T-1802E/CB is an optimal choice for designers prioritizing ultra-low power consumption and stability in space-constrained, battery-powered applications, offering an exceptional balance of efficiency and protection.

Keywords: Low Quiescent Current, LDO Voltage Regulator, 180mA, Battery-Powered Devices, Thermal Shutdown.