MCP1802T-3302I/OT: A 150mA Low-Quiescent Current LDO Voltage Regulator from Microchip

In the realm of power management for battery-operated and always-on applications, efficiency is paramount. The MCP1802T-3302I/OT from Microchip Technology stands out as a robust and highly efficient 150mA Low-Dropout (LDO) Voltage Regulator engineered specifically to extend battery life and enhance system reliability.

This LDO regulator is designed to deliver a fixed, stable 3.3V output from an input voltage range of 2.7V to 6.0V. Its core strength lies in its remarkably low quiescent current, which is typically just 120 nA. This ultra-low IQ is a critical feature for applications that spend a significant amount of time in standby or sleep modes, as it minimizes the power drain from the battery when the system is not actively processing, thereby significantly extending operational life.

Beyond its impressive efficiency, the MCP1802T offers a low dropout voltage of typically 210 mV at 150 mA load, ensuring stable regulation even as the input voltage approaches the output level. This is essential for maximizing the use of the available energy in battery-powered systems, allowing them to function correctly until the battery is nearly depleted. The device also incorporates key protection features such as current limit and thermal shutdown, safeguarding both the regulator and the downstream circuitry from potential damage under fault conditions.

Housed in a space-saving SOT-23-5 package, this LDO is ideal for compact, portable designs. Its high Power Supply Rejection Ratio (PSRR) and low noise output make it suitable for powering sensitive analog and digital components, including wireless modules, microcontrollers, and sensors in applications like IoT nodes, wearable electronics, medical devices, and smoke detectors.

ICGOOODFIND: The MCP1802T-3302I/OT is an exceptional choice for designers prioritizing ultra-low power consumption and small form factor. Its combination of 150mA output current, ultra-low quiescent current, and integrated protection makes it a cornerstone component for modern, energy-conscious electronic designs.

Keywords: Low Quiescent Current, LDO Voltage Regulator, 150mA Output, Battery-Powered Applications, Thermal Shutdown.