An integrated circuit voltage regulator is a compact component in IC form designed to maintain a steady output voltage despite fluctuations in input voltage or load changes. It integrates transistors, resistors, and other elements on a single chip, efficiently converting and stabilizing the power supply for sensitive circuits. 

With features like short-circuit protection and thermal shutdown, these voltage regulator chips ensure reliable power delivery, optimizing energy use while safeguarding the system's integrity. IC voltage regulators are crucial in various electronics, from portable devices to industrial equipment, enhancing performance and longevity.