RT6576DGQW(2)

Overview

The RT6576DGQW(2) 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 adjustable buck channels and two fixed LDO outputs. The device operates within an input voltage range of 5V to 25V. Switching frequencies are set at 300kHz and 355kHz for the respective buck channels. It is housed in a 20-WQFN (3x3) package with an exposed pad and supports an operating temperature range from -40°C to 85°C.

Feature Summary

• Dual-channel synchronous buck topology for efficient power conversion
• Integrated fixed-voltage LDOs providing auxiliary power rails
• Built-in sequencing control for orderly startup and shutdown
• Compact WQFN package design suitable for space-constrained applications

Applications

• Battery-powered portable electronic devices
• Mobile communication equipment power management
• Consumer electronics requiring multiple regulated supply rails
• Industrial handheld instruments

Procurement Notes

Verify the exact suffix designation during procurement, as variations may exist within the product family. Confirm that the specific ordering code matches the required pinout and internal configuration. Ensure compatibility with the intended PCB footprint and thermal requirements. Cross-reference datasheet revisions to confirm feature consistency. Validate component authenticity through authorized distribution channels.

Selection Notes

Select this component when a compact solution is needed for generating multiple supply voltages from a single battery source. The integrated LDOs reduce external component count compared to discrete solutions. Consider the switching frequency constraints when designing output filters. Evaluate thermal performance based on the expected load currents and ambient conditions. Verify that the input voltage range aligns with the system's battery profile.

Part Context

This part belongs to the RT6575/RT6576 series of dual-channel controllers from Richtek. The series is engineered for mobile and portable applications where efficiency and size are critical. It complements other PMIC offerings by providing a balanced mix of switching regulation and low-noise linear regulation in a single package.

Replacement Considerations

The RT6575BGQW is listed as a substitute option within the same manufacturer portfolio. Verify functional equivalence regarding pinout and electrical specifications before replacement.