6-Phase Digital Multi-Phase Controller With PMBus interface for VR12.5



The MP2953B is a digital multi-phase controller that provides power for the core of the INTEL VR12.5 platform. It works with MPS’ Intelli-Phase products to complete the multi-phase VR solution with minimal external components. It can be configured for 1 ~ 6 phase operation.

The MP2953B provides on-chip EEPROM to store and restore device configurations. Device configurations and fault parameters are easy to program or monitor using the PMBus interface. The MP2953B monitors and reports the output current through CS output from Intelli-Phase products.
The MP2953B is based on a unique digital multi-phase, non-linear control to provide fast transient response to load transient with minimal output capacitors. With only one power loop control method for both steady state and load transient, the power loop compensation is easily configured.


  • 6-Phase Digital PWM Controller
  • Intel’s VR12.5 Compliant
  • PMBus Compliant
  • Serial VID Interface for Programming and Monitoring
  • Pin Programmable SVID registers
  • Built-In EEPROM to Store Custom Configurations
  • Automatic Loop Compensation
  • Less External Components than Conventional Analog Controllers
  • Phase-Shedding at Light Load to Provide High Efficiency
  • Phase-to-Phase Active Current Balancing
  • Input and Output Voltage, Current, and Power Monitoring
  • Regulator Temperature Monitoring
  • Open-Drain FAULT# Signal for Fault Notification
  • RVP/OVP/UVP/OCP/OTP/UVLO Protection with Options of No Action, Latch, Retry, or Hiccup
  • Adjustable Load-Line Regulation
  • RoHS Compliant 5mmx5mm QFN-40


  • SS外部
  • Special FeaturesVR12.5
  • GradeCatalog
  • PackageQFN-40 (5x5)
  • VCC (max) (V)5.25
  • fsw (max) (kHz)1000
  • Ishutdown (typ) (mA)1
  • Regulated Outputs Phase6
  • VCC (min) (V)4.75
  • Iq (typ) (mA)18
  • fsw (min) (kHz)200