5.5V, 3A, 1.2MHz Synchronous Buck Converter with Soft Start and Power-Good

The RTQ5765A/RTQ5765B are a synchronous buck switching voltage regulator designed to operate within an input voltage range of 2.5V to 5.5V. It is capable of delivering up to 3A of output current and provides an adjustable output voltage greater than 0.6V. The RTQ5765A/RTQ5765B utilizes the Advanced Constant On-Time (ACOT^®) control architecture, which provides fast and stable regulation of the output voltage, making the RTQ5765A/RTQ5765B well-suited for applications with dynamic load requirements. By minimizing the external component count, the ACOT architecture simplifies the design process and reduces overall system cost, making the RTQ5765A/RTQ5765B an efficient and cost-effective solution for power management needs.The RTQ5765A/RTQ5765B are designed to be user-friendly and suitable for a wide range of applications. It features an independent enable control input pin and a power-good indicator, allowing for easy sequence control. Additionally, to manage inrush current during start-up, the device offers a programmable soft-start feature through an external capacitor connected to the SS pin, ensuring a smooth and controlled power-up process. Furthermore, the RTQ5765A/RTQ5765B provide comprehensive protection functions, including input undervoltage lockout, output undervoltage protection, output overvoltage protection, overcurrent protection, and over-temperature protection, enhancing system reliability and safeguarding against potential fault conditions. It incorporates cycle-by-cycle current-limit protection to safeguard against shorted outputs. The RTQ5765A/RTQ5765B are available in a compact SOT-583 (FC) package, offering flexibility in integration and space-saving advantages for various system designs.The recommended junction temperature range and ambient temperature range are −40°C to 125°C.