MIC5366-3.3YC5-TR: A 150mA Low-Quiescent Current LDO Voltage Regulator

In the realm of modern electronics, power management is a critical design consideration, especially for battery-powered and always-on applications. The MIC5366-3.3YC5-TR from Microchip Technology stands out as a premier solution, offering an optimal blend of performance, efficiency, and miniaturization. This low-dropout (LDO) voltage regulator is specifically engineered to deliver a stable 3.3V output from a higher input voltage source with a maximum output current of 150mA.

A defining characteristic of this LDO is its remarkably low quiescent current (Iq), typically just 20µA. This feature is paramount for extending battery life in portable devices such as wearables, medical sensors, and IoT nodes, where the circuit must spend the majority of its time in a low-power sleep mode. The minimal current draw of the regulator itself during these periods ensures that precious energy is conserved for active operation.

Beyond its ultra-low Iq, the MIC5366-3.3YC5-TR boasts an impressively low dropout voltage. It can maintain a stable 3.3V output even as the input voltage dips to just 3.4V, maximizing the usable energy from a discharging battery. The device also features excellent transient response and low noise output, making it suitable for powering noise-sensitive components like RF modules and analog sensors.

Housed in a tiny, 1mm x 1mm 5-pin SC-70 package, this regulator addresses the pressing need for board space conservation in compact consumer electronics. Its minimal external component requirement—often just a single small ceramic capacitor—further reduces the overall solution size and bill-of-materials cost. Integrated protection features, including current limit and thermal shutdown, ensure robust and reliable operation under fault conditions.

ICGOOODFIND: The MIC5366-3.3YC5-TR is an exceptional LDO regulator that sets a high standard for power efficiency and integration. Its combination of ultra-low quiescent current, low dropout voltage, and miniature form factor makes it an indispensable component for designers striving to create longer-lasting and smaller next-generation portable and wireless devices.

Keywords:

Low Quiescent Current

LDO Voltage Regulator

150mA Output Current

Battery-Powered Applications

SC-70 Package