描述 Description

The RT8816D is a 2/1 phase synchronous Buck PWM controller which is optimized for high performance graphic microprocessor and support nVidia OVR2 spec with PWM- VID interface. 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 overvoltage protection (OVP), undervoltage protection (UVP), current limit, and thermal shutdown into the WQFN-20L 3x3 package.The RT8816D 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 RT8816D 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
Power State Indicator ? 1P-CCM/2P-CCM/1P-DEM/2P-DEM
Two Embedded MOSFET Drivers and Embedded Switching Boot Diode
Support 1.8V PWM-VID Interface
External Reference Input Control
PWM-VID Dynamic Voltage Control
Dynamic Phase Number Control
Lossless RDS(ON) Current Sensing for Current Balance
Internal/External Soft-Start
Adjustable Current-Limit Threshold
Adjustable Switching Frequency
UVP/OVP Protection
Shoot Through Protection and Short Pulse Free Technology
Support an Ultra-Low Output Voltage as Standby Voltage
Thermal Shutdown
Power Good Indicator (EN to PG high = 500μs)

應(yīng)用 Application

? CPU/GPU Core Power Supply
? Desktop PC Memory, VTT Power
? Chipset/RAM Power Supply
? Generic DC-DC Power Regulator