MCP1790-5002E/DB: A Robust 500mA High-Voltage Input Low-Dropout Linear Regulator

In the realm of power management, designers frequently face the challenge of deriving a stable, low-noise voltage from a much higher and often fluctuating input source. The MCP1790-5002E/DB from Microchip Technology addresses this challenge head-on, offering a highly integrated and robust solution for applications requiring a dependable 5V output.

This regulator is engineered to accept a remarkably wide input voltage range from 7V to 70V, making it an exceptional choice for systems connected directly to industrial buses, automotive networks, or 48V telecom rails. Despite this high input capability, it delivers a precise 5V output with a maximum load current of 500mA, all while maintaining a low dropout voltage. This low dropout characteristic ensures efficient regulation even when the input voltage dips close to the output level, preserving system stability.

A key feature of the MCP1790 is its high level of integration and built-in protection. The IC incorporates essential functions such as current limiting, thermal shutdown, and an enable/shutdown pin for advanced power management. This reduces the need for external components, simplifies board design, and enhances overall system reliability. Its ability to operate over a wide temperature range (-40°C to +125°C) further qualifies it for harsh environments, including automotive and industrial settings.

Typical applications are diverse, spanning:

Automotive infotainment and cluster systems

Industrial control and automation systems

Telecommunications and networking equipment

Battery-powered equipment with multi-cell inputs

General-purpose high-voltage to low-voltage conversion

ICGOOODFIND: The MCP1790-5002E/DB stands out as a highly resilient and versatile power management solution. Its unparalleled 70V input tolerance, combined with a solid 500mA output current and comprehensive protection features, makes it an indispensable component for engineers designing robust systems against demanding voltage transients and noisy power sources.

Keywords: High-Voltage LDO, 70V Input, 500mA Regulator, Power Management, Microchip