RT6316BGQUF

Overview

The RT6316BGQUF is a synchronous step-down converter manufactured by Richtek USA Inc. It integrates a high-current buck regulator and dual low-dropout regulators within a single package. The primary switching output delivers up to 6A of continuous current, while the integrated LDOs provide fixed outputs of 3.3V and 5V. The device supports an input voltage range from 4.5V to 23V. It operates with a fixed internal switching frequency of 500kHz. The component is housed in a 23-UQFN(FC) package measuring 3x3mm. It functions reliably across a junction temperature range of -40°C to 125°C.

Feature Summary

• Integrates a 6A synchronous buck converter with two dedicated LDOs for combined power management
• Provides fixed 3.3V and 5V auxiliary rails suitable for logic and peripheral supply requirements
• Utilizes a compact 23-pin UQFN footprint to minimize printed circuit board area consumption

Applications

• Portable electronic devices requiring efficient multi-rail power distribution
• Industrial control systems utilizing embedded microcontrollers and peripherals
• Communication equipment needing stable voltage regulation for network interfaces

Procurement Notes

Verify the complete part number including suffixes against official manufacturer documentation before ordering. Confirm that the specific package variant matches the design requirements. Check datasheet specifications for thermal performance and electrical limits relevant to the target application environment. Ensure compliance with regional regulatory standards such as RoHS where applicable. Review distributor availability and lead times through authorized channels only.

Selection Notes

Select this component when a design requires a high-current main rail alongside fixed auxiliary voltages. The integrated topology reduces external component count compared to discrete solutions. Consider the 500kHz switching frequency for balancing efficiency and passive size. Evaluate the 23UQFN package for thermal dissipation capabilities within the enclosure constraints. Verify input voltage compatibility with the system power source.

Part Context

This device belongs to Richtek's portfolio of integrated power management solutions designed for space-constrained applications. It combines switching regulation with linear regulation to simplify bill of materials. The product line targets markets demanding high efficiency and reliable operation in compact form factors. Similar models in the series offer varying current ratings or different output configurations.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure replacement parts match the pinout, voltage ratings, and current capabilities. Verify package dimensions and thermal characteristics are compatible with existing footprints.