CAT823

The CAT823 is a high-performance, low-power CMOS voltage regulator manufactured by onsemi, designed for efficient power management in portable and battery-operated electronic systems. It provides a stable 3.3V output with a maximum load current of 150mA, making it ideal for applications requiring reliable and consistent voltage regulation under varying load conditions. The device features a low dropout voltage of typically 120mV at full load, ensuring high efficiency even when input voltage is close to the output level—a critical factor in extending battery life. This voltage regulator includes built-in protection mechanisms such as thermal shutdown and over-current protection, which enhance system reliability and prevent damage under fault conditions. Its compact 3-pin SOT-23 package reduces board space requirements while maintaining excellent thermal performance. The CAT823 operates from an input voltage range of 2.7V to 5.5V, offering flexibility across a wide range of power sources, including single-cell Li-ion batteries and standard 3.3V logic supplies. Key features include a fast transient response, low quiescent current (typically 40µA), and compatibility with ceramic capacitors for stable operation. These characteristics make it suitable for use in microcontroller-based systems, wearable devices, IoT sensors, and other low-power embedded applications where minimal power consumption and space constraints are critical. The device also supports automatic discharge functionality, which rapidly discharges the output capacitor when the device is turned off, improving system safety and reducing startup time. Designed for ease of integration, the CAT823 requires no external components beyond basic decoupling capacitors, simplifying circuit design and reducing overall BOM cost. Its robust design ensures long-term operational stability in harsh environments, including industrial and automotive applications where temperature variations and electrical noise are common. With onsemi’s proven manufacturing quality and process control, the CAT823 delivers consistent performance across temperature ranges from -40°C to +125°C, meeting stringent reliability standards for both consumer and industrial markets.