New Industry Products

Dual-Loop, Digital, Multi-Phase Controller with PMBus Interface

December 14, 2019 by Paul Shepard

The MP2853 from Monolithic Power Systems is a dual-loop, digital, multi-phase controller that provides power for the core of the AMD SVI 2.0 platform. The MP2853 can work with MPS Intelli-Phase products to complete the multi-phase voltage regulator (VR) solution with minimal external components. The MP2853 can be configured with up to 4-phase operation for Rail 1 and up to 2-phase operation for Rail 2.

The MP2853 provides an on-chip EEPROM to store and restore device configurations. Device configurations and fault parameters can be programmed easily or monitored via the PMBus™/I2C interface. The MP2853 can monitor and report output current through the CS output from Intelli-Phase products.

The MP2853 is based on a unique, digital, multi-phase, non-linear control to provide fast transient response to the 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 very easy to configure.

The MP2853 is available in a QFN-40 (5mmx5mm) package.

Typical application (click on image to enlarge)

Features & Benefits

  • Multi-Phase, Dual-Output, Digital Controller
  • AMD SVI 2.0 Compliant
  • Supports 3-Bit PVID Mode
  • PMBus/I2C Compliant (1MHz Bus Speed)
  • Pin Programmable for PMBus™ Address
  • Built-In EEPROM to Store Custom Configurations
  • Switching Frequency Range from 200kHz to 3MHz
  • Digital Load-Line Regulation
  • Over-Clocking Mode by Adding Offset to Output Voltage
  • Automatic Loop Compensation
  • Fewer External Components than a Conventional Analog Controller
  • Best Transient Performance with Non-Linear Digital Control
  • Flexible Phase Assignment for Dual Rails
  • Auto-Phase Shedding to Improve Overall Efficiency
  • Phase-to-Phase Active Current Balancing with Programmable Offsets for Thermal Balance
  • Input and Output Voltage, Current, and Power Monitoring
  • Regulator Temperature Monitoring
  • VIN UVLO, Output OVP/UVP, OCP_TDC/OCP_SPIKE, OTP with No Action, Latch, Retry, or Hiccup Options
  • Detection for Intelli-Phase MOSFET Fault Type
  • Auto-Recording VR Fault Type to EEPROM
  • Available in an RoHS Compliant QFN-40 (5mmx5mm) Package