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RT8809B

Richtek Technology
Part Number RT8809B
Manufacturer Richtek Technology
Description Multi-Phase PWM Controller
Published Dec 8, 2014
Detailed Description SacPower RT8809A/B Multi-Phase PWM Controller for GPU Core Power Supply General Description The RT8809A/B is a dual-p...
Datasheet PDF File RT8809B PDF File

RT8809B
RT8809B

Overview
SacPower RT8809A/B Multi-Phase PWM Controller for GPU Core Power Supply General Description The RT8809A/B is a dual-phase synchronous buck PWM controller with integrated drivers which are optimized for high performance graphic microprocessor and computer applications.
The IC integrates a G-NAVPTM PWM controller, two 12V MOSFET drivers with internal bootstrap diodes, as well as output current monitoring and protection functions into the WQFN-24L 4x4 package.
The RT8809A/B adopts DCR and RDS(ON) current sensing.
Load line voltage positioning (droop) and over current protection are accomplished through continuous inductor DCR current sensing, while RDS(ON) current sensing is used for accurate channel current balance.
Using both methods of current sampling utilizes the best advantages of each technique.
The RT8809A/B also features a one-bit VID control operation in which the feedback voltage is regulated and tracks external input reference voltage.
Other features include, adjustable ope...


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