MCP1700T-1802E/TT: A 180mA Low-Quiescent Current LDO Voltage Regulator from Microchip

In the world of embedded electronics, efficient power management is a cornerstone of design, especially for battery-powered applications. The MCP1700T-1802E/TT from Microchip Technology stands out as a highly specialized Low-Dropout (LDO) voltage regulator engineered to meet the stringent demands of modern portable and IoT devices. This component is designed to deliver a stable 1.8V output from an input voltage range of 2.3V to 6.0V, making it an ideal solution for powering microcontrollers, sensors, and wireless communication modules.

A defining characteristic of the MCP1700T-1802E/TT is its remarkably low quiescent current (IQ) of just 1.6 µA (typical). This ultra-low IQ is arguably its most significant feature, as it minimizes the current drawn from the power source when the load is in a standby or sleep mode. For devices that spend a majority of their operational life in a low-power state, this directly translates to dramatically extended battery life, enabling years of operation from a single primary cell battery.

Despite its minimal power consumption, the regulator does not compromise on performance. It is capable of providing a maximum output current of 180mA, sufficient to power a small microcontroller and its peripheral components. The device also offers a low dropout voltage of 178 mV (typical at 80mA load), allowing it to continue regulating the output voltage effectively even as the input voltage source, such as a battery, decays to a level very close to the desired output.

Housed in a compact SOT-23-3 package, the MCP1700T is tailored for space-constrained PCB designs. Its simplicity requires only input and output capacitors for stable operation, reducing both the bill of materials and board space. Furthermore, it includes built-in protection features such as current limit and thermal shutdown, safeguarding both the regulator and the downstream circuitry from fault conditions.

ICGOOODFIND: The MCP1700T-1802E/TT is an exceptional LDO for designers prioritizing ultra-low power consumption and compact form factor. Its combination of miniscule quiescent current, adequate output current, and robust protection makes it a superior choice for powering the next generation of energy-efficient and long-life portable devices.

Keywords: Low Quiescent Current, LDO Voltage Regulator, Battery-Powered Applications, 180mA Output, SOT-23 Package.