RT8816A – 7J

RT8816A – 7J

The RT8816A is a 2/1 phase synchronous Buck PWM
controller which is optimized for high performance graphic
microprocessor and support nVidia OVR2 spec with PWMVID 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 Over-Voltage Protection
(OVP), Under-Voltage Protection (UVP), current limit, and
thermal shutdown into the WQFN-20L 3×3 package.
The RT8816A adopts RDS(ON) current sensing technique.
Current limit is accomplished through continuous inductorcurrent-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 RT8816A features external reference input and PWMVID 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 softstart, power good indicator, and enable functions