RT7280GQW Integrated Circuits (ICs)

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RT7280GQW is a member of Realtek’s Universal Power Management (UPPM) family. The UPPM is a system-level power management device that provides a complete solution for power supply design, system safety, voltage and current optimisation, and system heat management. RT7280GQW is a synchronous DC-DC buck converter integrated with a high-side MOSFET switch and a low-side MOSFET switch. It provides fixed 3.3V, 5V, and 12V outputs and features a range of features that allow for a wide range of application types and conditions.

The key features of RT7280GQW include:

• High Efficiency: The RT7280GQW can achieve high efficiency up to 94%.
• Small Footprint: The RT7280GQW has a small footprint and offers a wide variety of packaging options.
• Soft Start: The RT7280GQW includes a soft start function to ensure smooth start-up.
• Protection Circuits: The RT7280GQW includes protection circuits to reduce the likelihood of incorrect application or design.
• Thermal Shutdown: The RT7280GQW includes thermal shutdown protection to prevent damage from thermal overloads.
• Auto-discharge: The RT7280GQW features an auto-discharge feature to prevent charge buildup on the output nodes.

RT7280GQW is a versatile device designed for a wide range of applications. It is an ideal solution for a variety of applications, from consumer electronics and mobile devices to industrial, automotive and medical systems, providing high performance and reliable power conversion.

Application Field

RT7280GQW is suitable for applications such as: Flash memory and other consumer electronic products; automotive RASP; IT, medical and industrial power supplies; and networking systems. It is particularly well suited for products which require high efficiency, small form factor and thermal protection.

Working Principle

RT7280GQW is an integrated synchronous buck DC-DC converter. The converter utilizes the charging and discharging of an inductor for energy conversion. The high-side and the low-side MOSFET switches work together to control the inductor current flow, providing control of the output voltage in proportion to the input voltage. When the input voltage increases, the high-side switch turns on and the low-side switch turns off, thereby increasing the cycle time and decreasing the duty cycle and the output voltage. On the other hand, when the input voltage decreases, the duty cycle increases and the output voltage increases.

The RT7280GQW also includes the advanced Global Proportional (GPR) control loop which is used to regulate and maintain the output voltage stability. GPR operates by adjusting the duty cycle in response to the load current and output voltage changes. In addition, RT7280GQW features soft-start, output over-current protection, output over-voltage protection, output under-voltage protection, and thermal shutdown.

The RT7280GQW is a highly efficient and feature-rich power supply design solution for a wide range of applications. Its features, size and performance make it ideally suited for mobile devices, consumer electronics, automotive, medical, and industrial applications.

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