Microchip MCP100T-450I/TT: A 450nA Ultra-Low-Power Supervisor with Push-Pull Output

In the world of electronic design, system reliability and power efficiency are paramount. The Microchip MCP100T-450I/TT stands out as a specialized supervisory circuit engineered to address these critical needs, particularly in battery-powered and portable applications where every nanoamp counts.

This device is fundamentally a voltage supervisor or microprocessor reset IC. Its primary role is to monitor the voltage of a system's power supply (VDD). When VDD dips below a predefined threshold—precisely 4.50V in this variant—the device asserts a reset signal. This crucial function prevents the microcontroller from operating unpredictably or writing corrupt data to memory under low-voltage conditions, thereby ensuring system integrity and a controlled startup sequence.

The MCP100T-450I/TT distinguishes itself with two key features. First is its ultra-low supply current of just 450nA (typical). This minuscule power draw is a significant advantage for products that must maximize battery life, such as smart sensors, medical implants, and always-on remote monitors. It minimizes the supervisor circuit's impact on the overall system power budget.

Second, it features a push-pull (PMOS) output stage. Unlike open-drain or open-collector outputs that require an external pull-up resistor to function, the push-pull output can actively drive the reset line high or low without any external components. This simplifies board design, reduces the bill of materials (BOM), and provides a strong, clean reset signal with no rise-time delay associated with a resistor, enhancing noise immunity.

Housed in a space-saving SOT-23-3 package, the MCP100T-450I/TT offers a compact and robust solution for space-constrained PCB designs. Its wide operating voltage range supports a variety of applications, making it a versatile choice for designers seeking to enhance their system's reliability and efficiency.

ICGOOODFIND: The Microchip MCP100T-450I/TT is an exceptional solution for designers prioritizing ultra-low power consumption and design simplicity. Its combination of a nanowatt-level operating current and a strong push-pull output makes it an ideal guardian for mission-critical, battery-operated systems where reliability cannot be compromised.

Keywords: Ultra-Low Power, Voltage Supervisor, Push-Pull Output, Microprocessor Reset, Battery-Powered Devices.