The RT8293BH is a synchronous buck converter designed and manufactured by Richtek USA Inc. It's designed to provide a high-efficiency, step-down DC-DC conversion for various portable and embedded applications. This converter integrates power MOSFETs and provides accurate output voltage regulation.

Applications

• Notebook Computers
• Netbooks
• Tablet PCs
• Point-of-Load Power Supplies
• Embedded Systems

Features

• High Efficiency: Up to 95% efficiency.
• Input Voltage Range: 4.5V to 18V.
• Output Voltage Range: 0.6V to 5.5V.
• Integrated Power MOSFETs: Reduces external component count and simplifies design.
• Adjustable Switching Frequency: 200kHz to 600kHz.
• Current Mode Operation: Provides excellent transient response.
• Short Circuit Protection (SCP).
• Over-Voltage Protection (OVP).
• Thermal Shutdown Protection (TSD).
• Enable/Disable Control.
• Power Good Indicator.

Benefits

• Increased Battery Life: High efficiency minimizes power loss, extending battery life in portable devices.
• Smaller Solution Size: Integrated MOSFETs reduce the need for external components, allowing for a more compact design.
• Stable Output Voltage: Current mode operation ensures a stable output voltage even under varying load conditions.
• Protection Against Fault Conditions: SCP, OVP, and TSD features protect the converter and the connected load from damage.
• Flexibility in Design: Adjustable switching frequency allows for optimization of efficiency and component size.
• Simplified System Monitoring: Power good indicator provides a signal to indicate when the output voltage is within the specified range.

Technical Specifications

The RT8293BH operates with an input voltage ranging from 4.5V to 18V, making it suitable for a wide range of power sources. The output voltage is adjustable from 0.6V to 5.5V, allowing for flexibility in powering different types of loads. The adjustable switching frequency ranges from 200kHz to 600kHz, which can be optimized for specific application requirements. The integrated MOSFETs have low on-resistance, contributing to high efficiency. The converter also features cycle-by-cycle current limiting, which further enhances its protection capabilities.

The current mode operation provides excellent transient response, ensuring that the output voltage remains stable even when the load current changes rapidly. This is particularly important in applications where the load current can vary significantly, such as in notebook computers and tablet PCs. The integrated protection features, including SCP, OVP, and TSD, protect the converter and the load from damage in the event of a fault condition.

Richtek's RT8293BH is a highly efficient and reliable synchronous buck converter that offers a complete solution for point-of-load power supplies in various applications. Its integrated features, protection mechanisms, and adjustable parameters make it a versatile choice for designers looking for a high-performance step-down DC-DC converter.