The RT9629B is a high-efficiency synchronous rectified step-down (buck) converter manufactured by Richtek USA Inc. It is designed to provide a stable and efficient voltage conversion for various electronic devices. The RT9629B integrates high-side and low-side MOSFETs and operates with a wide input voltage range, making it suitable for a variety of applications.

Applications

• Point-of-load (POL) regulators
• Embedded systems
• Networking equipment
• Industrial power supplies
• Distributed power architectures

Features

• Wide input voltage range
• High efficiency
• Integrated high-side and low-side MOSFETs
• Adjustable output voltage
• Over-current protection (OCP)
• Over-temperature protection (OTP)
• Under-voltage lockout (UVLO)

Benefits

• Increased energy efficiency due to synchronous rectification
• Stable and adjustable voltage supply for various loads
• Simplified design with integrated MOSFETs
• Protection against over-current, over-temperature, and under-voltage conditions
• Improved system reliability due to built-in protection features

Detailed Specifications

The RT9629BZQW typically supports an input voltage range from 4.5V to 18V. The output voltage is adjustable via external resistors. It delivers up to 3A of continuous output current. The switching frequency can be externally programmed. It is available in a thermally enhanced package, such as a WDFN package, suitable for efficient heat dissipation.

The synchronous rectification minimizes power loss by replacing the Schottky diode with a low RDS(on) MOSFET, improving the overall efficiency of the converter. The integrated MOSFETs reduce the external component count and simplify the PCB layout. The adjustable output voltage allows the converter to be tailored to different load requirements. The over-current, over-temperature, and under-voltage protection features safeguard the converter and the connected load from damage in fault conditions.

In summary, the RT9629BZQW is a high-performance synchronous buck converter suitable for a wide range of applications requiring efficient and stable voltage conversion. Its wide input voltage range, adjustable output voltage, and integrated protection features make it an excellent choice for point-of-load regulation and distributed power architectures.