RT8820A中文资料Dual-Phase PWM Controller with PWM-VID Reference数据手册Richtek规格书

描述 Description

The RT8820A is a 2/1 phase synchronous Buck PWM controller which is optimized for high performance graphic microprocessor and computer applications. The IC integrates a Constant-On-Time (COT) PWM controller, two MOSFET drivers with internal bootstrap diodes, as well as channel current balance and protection functions including Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), current limit, and thermal shutdown into the WQFN-20L 3x3 package.



The RT8820A adopts RDS(ON) current sensing technique. Current limit is accomplished through continuous inductor-current-sense, while RDS(ON) current sensing is used for accurate channel current balance. Using the method of current sampling utilizes the best advantages of each technique.



The RT8820A features external reference input and PWM-VID dynamic output voltage control, in which the feedback voltage is regulated and tracks external input reference voltage. Other features include adjustable switching frequency, dynamic phase number control, internal soft-start, power good indicator, and enable functions.

特性 Features

•Dual-Phase PWM Controller
•Two Embedded MOSFET Drivers and Embedded Switching Boot Diode
•External Reference Input Control
•Dynamic Phase Number Control
•Internal/External Soft-Start
•Adjustable Switching Frequency
•Shoot Through Protection and Short Pulse Free Technology
•Thermal Shutdown
•Power Good Indicator (EN to PG high = 500μs)

应用 Application

• CPU/GPU Core Power Supply
• Chipset/RAM Power Supply
• Generic DC-DC Power Regulator