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2-Phase Controller with Dual Integrated Drivers for VR12.5 and VR12.6 Mobile CPU Core Power Supply

RT8886A

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The RT8886A is a two phase CPU power controller with dual integrated drivers for VR12.5 and VR12.6 compliant. The RT8886A adopts the G-NAVPTM (Green Native AVP) which is Richtek's proprietary topology derived from finite DC gain of EA amplifier with current mode control, making it easy to set the droop to meet all Intel CPU requirements of AVP (Adaptive Voltage Positioning). Based on the G-NAVPTM topology, the RT8886A also features a quick response mechanism for optimized AVP performance during load transient. The RT8886A supports mode transition function with various operating states. A Serial VID (SVID) interface is built in the RT8886A to communicate with Intel VR12.5 and VR12.6 compliant CPU. The RT8886A supports VID on-the-fly function with different slew rates. By utilizing the G-NAVPTM topology, the operating frequency of the RT8886A varies with VID, load current and input voltage to further enhance the efficiency even in CCM. Besides the G-NAVPTM, the CCRCOT (Constant Current Ripple Constant On Time) technology provides superior output voltage ripple over the entire input/output range. The built-in high accuracy DAC converts the SVID code ranging from 0.5V to 3.04V with 10mV per step. The RT8886A integrates a high accuracy ADC for platform setting functions, such as no-load offset and over-current protection level. The RT8886A provides VR ready output signals. It also features complete fault protection functions including Over-Voltage (OV), Under-Voltage (UV), Negative-Voltage (NV), Over-Current (OC) and Under-Voltage Lockout (UVLO). The RT8886A is available in the WQFN-32L 4x4 small foot print package.

Applications

  • VR12.5 and VR12.6 Intel Core Supply
  • Notebook Multi-phase CPU Core Supply
  • AVP Step-Down Converter
Key Spec.
RT8886A
Status Active
VID Table Support VR12.5
Number of Phases 2
Vcc (typ) (V) 5
Vin (min) (V) 5
Vin (max) (V) 25
Accuracy (Vout>=1V) (+/- %) 0.5
Freq (typ) (kHz) 600
Built-in DAC Generator Yes
Number of MOSFET Drivers 2
Features Adjustable Frequency;Built-in Bootstrap Switch;DCR Current Sense;Diode Emulation Mode;Droop Control;Enable Input;Fast Transient Response;G-NAVP Control;OCP;OVP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type WQFN4x4-32
Features
  • Intel VR12.5 and VR12.6 Serial VID Interface Compatible Power Management States
  • 2/1 Phase PWM Controller with Dual Integrated Drivers
  • G-NAVPTM Topology
  • 0.5% DAC Accuracy
  • Differential Remote Voltage Sensing
  • Built-in ADC for Platform Programming
  • Accurate Current Balance
  • System Thermal Compensated AVP
  • Diode Emulation Mode at Light Load Condition for Single Phase
  • Fast transient Response
  • VR Ready Indicator
  • Thermal Throttling
  • Current Monitor Output
  • OVP, UVP, OCP, UVLO
  • Programmable DVID Slew Rate
  • DVID Enhancement
  • Small 32-Lead WQFN Package
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
2-Phase Controller with Dual Integrated Drivers for VR12.5 and VR12.6 Mobile CPU Core Power Supply2013/10/31
Technical Documents
TitleLast UpdateShareDownload
Richtek Vcore Product Selection List for Intel and AMD platforms [May, 2017]2018/11/15
Introduction to Richtek VCORE Solutions2017/10/18
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