Microchip MCP1793T-3302H/DC: A Robust 300 mA High-Voltage Input LDO Voltage Regulator

In applications where stable, clean, and reliable voltage regulation is required from a high input source, Low-Dropout (LDO) regulators are often the component of choice. The Microchip MCP1793T-3302H/DC stands out in this category by specifically addressing the challenge of managing very high input voltages while delivering a consistent, low-noise output.

This regulator is engineered to accept a remarkable input voltage range of up to 45V, making it exceptionally suited for industrial, automotive, and telecommunications environments where voltage spikes and wide fluctuations are common. Despite this high input capability, it efficiently provides a fixed, precise 3.3V output at a current of up to 300 mA. This combination is vital for powering sensitive microcontrollers, sensors, and communication modules directly from unregulated or noisy high-voltage power rails, such as 24V industrial systems or 12V/24V automotive batteries.

A key feature of the MCP1793T is its low dropout voltage. Even at full load, the regulator only requires a minimal voltage differential between input and output to maintain regulation, which enhances its efficiency, particularly as the input voltage decreases closer to the output level. Furthermore, the device incorporates critical protection mechanisms, including internal current limiting and thermal shutdown, which safeguard both the regulator and the downstream circuitry from damage under fault conditions. Its low quiescent current also makes it a consideration for always-on applications.

Housed in a space-efficient SOT-223 package, the MCP1793T-3302H/DC offers a compelling blend of high-voltage resilience, solid output current capability, and integrated protection in a compact form factor.

ICGOOODFIND: The Microchip MCP1793T-3302H/DC is an optimal solution for designers seeking a robust, high-voltage LDO to deliver stable 3.3V power in demanding electrical environments, simplifying power architecture and improving system reliability.

Keywords: High-Voltage LDO, 300 mA Regulator, 45V Input, 3.3V Output, Thermal Shutdown