RT8209BGQW Integrated Circuits (ICs)

PMIC - Voltage Regulators - DC DC Switching Controllers

The RT8209BGQW is a high-performance dual-channel fixed-frequency step-down DC-DC synchronous rectification controller that supports wide input voltage range, output current up to 1.2A and integrated MOSFETs. It is designed to achieve high efficiency in a very simple system configuration.

Application Field

The RT8209BGQW is widely used in notebook PCs, desktop PCs, servers, servers and disk arrays, AIOs and industrial computers. It is also suitable for medical instrumentation, home entertainment appliances, GPS receivers and communication networks. It is mainly used for VRM and other DC-DC power supply module systems such as LCD flat panel displays, notebook, tablet and mini-PC.

Working Principle

The RT8209BGQW is equipped with a built-in synchronous rectification controller, inductor current sense amplifier, soft-start circuit, over-voltage protection, over-temperature protection and a power supply for low-power auxiliary circuits. The built-in synchronous rectification controller can detect the load current at the CS and then switch the N-channel and P-channel MOSFETs independently to achieve the synchronous rectification control.

The DC-DC system utilizes a synchronous rectification architecture to achieve high efficiency. During the high side switch on time, the inductor current passes through the high side power switch to the load. During the low side switch on time, the inductor current returns from the ground and the current sense signal voltage is amplified and sent as feedback. The circuit also monitors and limits the output current, output voltage and temperature.

With a wide input voltage range, high operating frequency, low operating current, low output ripple and low EMI, the RT8209BGQW is a great choice for DC-DC applications. It also supports selectable soft-start time, selectable peak current limit, under-voltage lockout (UVLO) and over-temperature protection (OTP). Moreover, the device has a low shutdown current and a compact package size to save board space.

Conclusion

The RT8209BGQW is a high-performance dual-channel fixed-frequency step-down DC-DC synchronous rectification controller. It has a wide input voltage range, output current up to 1.2A and integrated MOSFETs. It is suitable for a variety of applications, from medical instrumentation to home entertainment devices. Its features include a built-in synchronous rectification controller, inductor current sense amplifier, soft-start circuit, over-voltage protection, over-temperature protection and a power supply for low-power auxiliary circuits. With its features and capabilities, it is an ideal choice for DC-DC applications.