AP0100AT

AP0100AT is a high-efficiency, low-dropout linear regulator (LDO) manufactured by onsemi, designed for stable and reliable power management in portable and battery-powered applications. It features an output voltage of 3.3V with a maximum output current of 100mA, making it ideal for powering sensitive analog and digital circuits in compact electronic devices. The device operates with a very low quiescent current of typically 50µA, which significantly extends battery life in energy-conscious systems. Its dropout voltage is as low as 120mV at full load, ensuring efficient regulation even when the input voltage approaches the output level—critical in applications where input supply voltages are close to the required output. Built with robust thermal protection and short-circuit protection, the AP0100AT ensures safe operation under adverse conditions. The internal pass transistor provides excellent line and load regulation, maintaining a stable output voltage despite variations in input voltage or load current. This makes it suitable for use in environments with fluctuating power sources or varying operational demands. This LDO is available in a small, lead-free SOT-23-3 package, offering a space-saving solution for densely populated PCBs. Its wide operating input voltage range from 3.6V to 5.5V allows compatibility with various power sources, including single-cell lithium-ion batteries and standard 5V USB supplies. Common applications include wearable electronics, IoT sensors, microcontroller-based systems, and portable medical devices where low noise, high stability, and minimal power consumption are essential. The AP0100AT also supports fast transient response, minimizing output voltage deviations during sudden load changes—an important feature for digital logic circuits requiring clean power rails. Its low-noise performance, combined with high ripple rejection (>60dB at 1kHz), ensures clean power delivery to sensitive components such as RF modules, ADCs, and precision amplifiers. Additionally, the device requires no external components for basic operation, simplifying design and reducing bill-of-materials costs. Engineered for reliability and ease of integration, the AP0100AT meets AEC-Q100 qualification standards, making it suitable for automotive and industrial applications that demand long-term performance and durability under harsh conditions.