The RT8170A is a single phase CPU power controller with one integrated driver for VR12.5 and VR12.6 compliant. The RT8170A 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 RT8170A also features a quick response mechanism for optimized AVP performance during load transient. The RT8170A supports mode transition function with various operating states. A Serial VID (SVID) interface is built in the RT8170A to communicate with Intel VR12.5 and VR12.6 compliant CPU. The RT8170A supports VID on-the-fly function with different slew rates. By utilizing the G-NAVPTM topology, the operating frequency of the RT8170A 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 RT8170A integrates a high accuracy ADC for platform setting functions, such as no-load offset and over-current protection level. The RT8170A 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 RT8170A is available in the WQFN-32L 4x4 small foot print package.


  • VR12.5 and VR12.6 Intel Core Supply
  • Notebook CPU Core Supply
  • AVP Step-Down Converter
Key Spec.
Status Active
VID Table Support VR12.5
Number of Phases 1
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 1
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
  • Intel VR12.5 and VR12.6 Serial VID Interface Compatible Power Management States
  • Single Phase PWM Controller with Integrated Driver
  • G-NAVPTM Topology
  • 0.5% DAC Accuracy
  • Differential Remote Voltage Sensing
  • Built-in ADC for Platform Programming
  • 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
  • Programmable DVID Slew Rate
  • DVID Enhancement
  • RoHS Compliant and Halogen Free
TitleLast UpdateDownload
Single-Phase Controller with Integrated Driver for VR12.5 and VR12.6 Mobile CPU Core Power Supply2015/05/20
Technical Documents
TitleItem TypeLast UpdateDownload
Introduction to Richtek VCORE Solutions App. Note2017/05/31