The RT3628AE is a synchronous buck controller which supports 2 output rails and can fully meet Intel IMVP9.1 requirements. The RT3628AE adopts 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 RT3628AE features a new generation of quick response mechanism (Adaptive Quick Response, AQR) to optimize AVP performance during load transient and reduce output capacitors. The RT3628AE integrates a high accuracy ADC for platform and function settings, such as ICCMAX, switching frequency, overcurrent threshold and AQR trigger level. The RT3628AE provides VR Ready and thermal indicators. It also features complete fault protection functions, including overvoltage (OV), undervoltage (UV), overcurrent (OC) and undervoltage lockout (UVLO). The RT3628AE supports several functions which can be set by I2C interface, like thermal balance adjustment, dynamic load line, voltage offset setting, fix VID setting, protection report, protection disable and Current/PSYS/Temperature report. The recommended junction temperature is -40°C to 125°C.


  • IMVP9.1 Intel Core/AXG Supply
  • Desktop and Notebook Computer
  • AVP Step-Down Converter
Key Spec.
Status Active
VID Table Support IMVP9.1
Number of Phases 1;8
Vin (min) (V) 4.5
Vin (max) (V) 24
Freq (typ) (kHz) 400
Built-in DAC Generator Yes
Features Adjustable Frequency;DCR Current Sense;Diode Emulation Mode;Fast Transient Response;Fast Transient Response;G-NAVP Control;G-NAVP Control;OCP;OVP;Power Good;UVP
Package Type WQFN7x7-60
  • Intel IMVP9.1 Compliant
  • 8/7/6/5/4 Phase (CORE VR) + 1 Phase (AXG VR) PWM Controller
  • G-NAVPTM (Green Native Adaptive Voltage Positioning) Topology
  • 0.5% DAC Accuracy
  • Differential Remote Voltage Sensing
  • Built-in ADC for Platform Programming and Reporting
  • Accurate Current Balance
  • Diode Emulation Mode at Light Load Condition
  • Fast Transient Response: Adaptive Quick Response (AQR)
  • VR Ready Indicator
  • OVP, OCP, UVP with Flag
  • Switching Frequency Setting
  • Slew Rate Setting
  • DVID Enhancement
  • Acoustic Noise Suppression
  • Zero Load-line
  • Rail Disable
  • Standard I2C Protocol Interface
    ► Thermal Balance Adjustment
    ► Dynamic Load Line Setting
    ► Voltage Offset Setting
    ► Fixed VID Setting
    ► Protection Report and Protection Disable
    ► Current/PSYS/Temperature Report
  • Soldering Good Detection
  • Small 60-Lead WQFN Package