RT6310BGQUF

Overview

The RT6310BGQUF is a dual-output power management IC from Richtek USA Inc., integrating one synchronous buck converter and one low-dropout linear regulator. The buck output delivers up to 10A at a fixed 3.3V, while the LDO provides 100mA at a fixed 3.3V. It operates with an input voltage range of 4.5V to 23V and features a fixed switching frequency of 500kHz. The device is housed in a compact 23-UQFN(FC) package measuring 3x3 mm and supports junction temperatures from -40°C to 125°C.

Feature Summary

• Integrates a high-current synchronous step-down converter alongside a dedicated low-noise LDO within a single compact package.
• Features integrated sequencing logic to manage startup and shutdown transitions between the buck and LDO outputs.
• Utilizes a small footprint 23-pin UQFN package designed for efficient thermal dissipation in space-constrained designs.

Applications

• Portable electronic devices requiring multiple regulated voltage rails
• Industrial control systems needing robust power regulation
• Communication infrastructure equipment

Procurement Notes

Verify the specific suffix 'BGQUF' against the manufacturer's latest datasheet to confirm pinout compatibility and electrical specifications. Ensure that the required output voltages match the fixed internal settings of 3.3V for both channels. Confirm that the 10A buck current rating meets the peak load requirements of the target application circuit.

Selection Notes

Select this component when a design requires a combined solution for high-current digital logic and lower-current analog or peripheral supplies. The fixed 3.3V outputs eliminate the need for external feedback resistors, simplifying the bill of materials. Consider the 500kHz switching frequency for balancing efficiency and passive component size.

Part Context

This part belongs to the RT6310 family of dual-output PMICs. Variants such as the RT6310AGQUF offer programmable buck outputs, while the RT6310CGQUF provides different fixed voltage combinations. All variants share similar packaging and core topology but differ in output configuration and voltage settings.

Replacement Considerations

Direct substitutes include other RT6310 family members like the RT6310AGQUF or RT6310CGQUF, provided the fixed voltage requirements align with the application needs. Verify pin-to-pin compatibility before swapping to ensure correct functionality without PCB redesign.

FAQ

Does the RT6310BGQUF support adjustable output voltages?

No, the RT6310BGQUF variant features fixed internal output voltages of 3.3V for both the buck converter and the LDO channel.

What is the maximum operating temperature for this IC?

The device is rated for a junction temperature range of -40°C to 125°C.