MCP1804T-C002I/MB: A 150mA CMOS Low-Dropout (LDO) Voltage Regulator from Microchip

In the world of modern electronics, stable and efficient power management is a fundamental requirement. The MCP1804T-C002I/MB, a 150mA CMOS Low-Dropout (LDO) Voltage Regulator from Microchip Technology, stands out as a critical component designed to meet this need in space-constrained and power-sensitive applications.

This LDO regulator is engineered to deliver a fixed, precise output voltage of 2.0V from an input voltage range of 2.3V to 6.0V. Its core strength lies in its exceptionally low dropout voltage—typically 115mV at 150mA load—which ensures high efficiency and allows it to continue regulating the output voltage even when the input voltage dips very close to the output level. This characteristic is vital for maximizing battery life in portable devices, as it permits the use of nearly all the stored energy before shutdown.

A key advantage of the MCP1804 series is its ultra-low quiescent current. With a typical ground current of just 3.5 µA during operation and a mere 15 nA in shutdown mode, it is exceptionally efficient under both load and standby conditions. This makes it an ideal choice for battery-powered applications that demand long operational life, such as wireless sensors, IoT nodes, smart watches, and other portable electronics.

The device is built using a CMOS process, which is directly responsible for its low power consumption. Furthermore, it incorporates essential protection features like internal current limiting and thermal shutdown, safeguarding both the regulator and the downstream circuitry from damage under fault conditions. Its high power supply rejection ratio (PSRR) and low output noise ensure a clean, stable voltage supply, which is crucial for powering noise-sensitive components like microcontrollers, RF modules, and sensors.

Housed in a compact SOT-89-3 package, the MCP1804T-C002I/MB offers a robust performance in a minimal footprint, simplifying board design for compact products. Its overall combination of low noise, high efficiency, and integrated protection establishes it as a highly reliable building block for power management architectures.

ICGOODFIND: The MCP1804T-C002I/MB is a quintessential component for modern low-power design, excelling in battery-critical applications due to its ultra-low quiescent current and low dropout voltage, making it a top-tier choice for designers prioritizing longevity and stability.

Keywords: Low-Dropout (LDO), Low Quiescent Current, Voltage Regulator, Battery-Powered Applications, Thermal Shutdown.