RT6258BHGQUF

Overview

The RT6258BHGQUF is a synchronous step-down converter with an integrated 3.3V LDO, manufactured by Richtek USA Inc. It operates within a 4.5V to 23V input voltage range and delivers up to 8A output current at a fixed 3.3V level. The device features a 500kHz switching frequency and consumes 100uA of quiescent current. It utilizes a UQFN-HL-12 package and supports operation from -40°C to +125°C.

Feature Summary

• Integrates a high-current synchronous buck converter with a dedicated low-dropout regulator for dual power rail generation.
• Provides stable voltage regulation across wide input supply variations suitable for industrial environments.
• Optimized for compact designs through efficient thermal dissipation in a small surface-mount footprint.

Applications

• Powering microcontrollers from industrial 24V supply rails
• Smart home appliance control systems
• IoT device power management

Procurement Notes

Verify the specific suffix HGQUF against the manufacturer's official datasheet to confirm pinout compatibility and thermal characteristics. Ensure that the required 3.3V fixed output aligns with system design needs, as this variant differs from adjustable or other fixed voltage options within the same family.

Selection Notes

Select this component when a combined solution for main logic power and auxiliary rail generation is required. The fixed 3.3V output simplifies design compared to adjustable variants. Consider the 8A capacity and 23V input limit to ensure adequate headroom for peak loads and maximum supply voltages in the target application.

Part Context

This part belongs to the RT6258 series of power management ICs designed for high-efficiency DC-DC conversion. It complements other Richtek regulators like the RT6256 and RT6278 by offering integrated LDO functionality alongside the primary switching stage, targeting applications requiring multiple regulated outputs from a single component.

Replacement Considerations

The RT6258CFN-A is listed as an alias for this part number. Verify electrical specifications and package dimensions before substitution to ensure functional equivalence in the existing circuit layout.