RT8206BGQW

Overview

The RT8206BGQW is a dual step-down Switch Mode Power Supply (SMPS) controller designed for notebook computer main power supplies. It features two PWM controllers with fixed 5V and 3.3V outputs or adjustable ranges from 2V to 5.5V. The device operates with an input voltage range of 6V to 25V and includes a linear regulator providing up to 70mA at 5V. It utilizes constant on-time control for fast load transient response and offers ultrasonic mode operation to eliminate audio noise.

Feature Summary

• Constant on-time PWM control scheme eliminates the need for sense resistors while maintaining relatively constant switching frequency.
• Ultrasonic mode maintains switching frequency above 25kHz to prevent audible noise in audio-sensitive applications.
• Diode Emulation Mode maximizes efficiency during light load conditions, reducing overall power consumption.
• Integrated linear regulator provides automatic bootstrapping to the bypass input with fixed 5V output capability.

Applications

• Notebook computer main power supply systems
• Battery-powered logic supply voltage generation
• Audio-sensitive portable devices requiring ultrasonic operation

Procurement Notes

Verify component authenticity through authorized distributors as the manufacturer may issue product change notices. Confirm package integrity and moisture sensitivity level handling procedures prior to assembly. Cross-reference datasheet revisions to ensure compatibility with existing design specifications and regulatory compliance requirements.

Selection Notes

Select this controller for designs requiring independent enable signals and power good outputs for dual rail sequencing. The wide input voltage range supports various battery configurations. Consider the fixed 5V/3.3V options for standard logic supplies or the adjustable range for custom voltage requirements within the specified limits.

Part Context

This component belongs to Richtek's high-efficiency main power supply controller series specifically engineered for notebook computers. It addresses the demand for compact PCB size and low power consumption in portable electronics by integrating multiple regulation stages into a single WQFN-32L package.

Replacement Considerations

RT8206AGQW serves as a functional alternative within the same family, offering similar dual-output capabilities and control schemes for notebook power applications.