RT6585CGQW

Overview

The RT6585CGQW is a dual-channel synchronous DC-DC step-down controller with integrated 5V and 3.3V LDOs, designed for battery-powered systems. It features two PWM channels operating at switching frequencies of 500 kHz or 600 kHz. The device provides four outputs in total, combining the adjustable buck converters with fixed LDO rails. Packaged in a WQFN-20 format, it serves as a compact power management solution for portable electronics requiring efficient voltage regulation.

Feature Summary

• Dual-channel synchronous step-down control architecture
• Integrated fixed 5V and 3.3V low-dropout regulators
• Configurable switching frequency options for optimization
• High duty cycle capability for wide input voltage ranges

Applications

• Battery-powered portable electronic devices
• Mobile communication equipment power systems
• Digital camera power management modules
• Notebook computer subsystem voltage generation

Procurement Notes

Verify the specific suffix CGQW against the manufacturer datasheet to confirm package type and temperature grade. Ensure compatibility with external MOSFET selection for the specified switching frequencies. Confirm availability through authorized distributors as lead times may vary. Cross-reference pinouts with existing board designs to prevent integration errors during procurement.

Selection Notes

Select this component when a dual-buck topology with auxiliary LDOs is required for space-constrained designs. Consider the WQFN-20 package for thermal performance and footprint efficiency. Evaluate the 500 kHz or 600 kHz frequency options based on inductor size constraints and noise sensitivity requirements of the target application circuit.

Part Context

This part belongs to the RT6585 family of ultra-low quiescent current system buck controllers from Richtek Technology Corporation. The series targets applications demanding high efficiency in battery-operated environments. The RT6585C variant specifically integrates the LDO functions alongside the primary switching controllers, distinguishing it from basic controller-only versions in the lineup.

Replacement Considerations

The RT6585BGQW is a confirmed substitute within the same family, offering identical functional specifications and pinout compatibility. Verify that the B-grade suffix does not imply different electrical limits compared to the C-grade version before substitution.