CAT4101 LED Driver

The CAT4101 is a linear constant-current sink LED driver capable of driving up to 1A of current to a string of high-brightness LEDs. It operates with a very low dropout voltage of just 0.5V at full load, maximizing efficiency and allowing operation from low-voltage supplies. The device features a simple EN/PWM pin for both enable and PWM dimming control, eliminating the need for complex external circuitry. It is designed for applications requiring high-current LED driving, such as architectural lighting, signage, and industrial lighting. The CAT4101 is available in a thermally efficient TO-263 (D2PAK) package, ensuring reliable thermal performance. Its linear architecture provides a clean, low-noise solution compared to switching regulators, making it suitable for noise-sensitive applications. This driver is an excellent choice for designers seeking a compact, easy-to-implement solution for driving powerful LED strings with precise current control and dimming capabilities.