RT6258CGQUF

Overview

The RT6258 is a high-efficiency, synchronous step-down DC/DC converter from Richtek USA Inc. It integrates two N-channel power MOSFETs and operates with an input voltage range of 2.7V to 16V. The device delivers up to 3A output current with adjustable output voltages. It features fixed switching frequencies of 400kHz or 1MHz, selectable via the FREQ pin. Key protections include over-current protection (OCP), thermal shutdown (TSD), and soft-start functionality. The component is housed in a compact QFN-16L package, suitable for space-constrained portable applications.

Feature Summary

• Integrated synchronous rectification with dual N-channel MOSFETs for high efficiency
• Adjustable output voltage with precise regulation capabilities
• Built-in comprehensive protection mechanisms including over-current and thermal shutdown
• Flexible switching frequency selection to optimize external component size

Applications

• Portable consumer electronics such as smartphones and tablets
• Wireless communication equipment requiring stable low-voltage power rails
• Industrial control systems needing efficient DC-DC conversion
• Battery-powered devices utilizing single-cell lithium-ion batteries

Procurement Notes

Verify the specific suffix codes on the ordering information to confirm the exact switching frequency option and packaging details. Ensure compatibility with your PCB footprint by checking the mechanical dimensions provided in the datasheet. Confirm that the ambient operating temperature range meets your system requirements before finalizing procurement.

Selection Notes

Select this component when a compact solution is required for converting higher battery voltages to lower logic levels. Consider the fixed switching frequency options based on the desired trade-off between efficiency and passive component size. Evaluate the thermal performance under maximum load conditions to ensure adequate heat dissipation within the QFN-16L package constraints.

Part Context

This part belongs to Richtek's family of synchronous buck converters designed for portable applications. It complements other models in the series by offering a balance of current capacity and integration level. The RT6258 targets markets demanding high power density and reliable operation from single-cell lithium sources.

Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio that offer similar current ratings and input voltage ranges. Verify that any substitute maintains the same switching frequency options and protection features to ensure seamless integration without redesigning the surrounding circuitry.