MP2985B

MP2985B

Dual-Loop, Digital, 8-Phase Controller with Flexible PWM Firing Order and PMBus Interface for VR14 and Earlier Protocols

Description

The MP2985B is a dual-loop, digital, multi-phase controller that provides power for the CPU core of VR14 and earlier platforms. The MP2985B works with MPS’s Intelli-Phase^TM products and other vendors’ DrMOS products to complete the multi-phase voltage regulator (VR) solution with a minimal number of external components. It can be configured for up to 8-phase operation.

The MP2985B provides an on-chip non-volatile memory (NVM) to store and restore device configurations. Device configurations and fault parameters can be easily configured or monitored via the PMBus/I²C interface. The device can monitor and report the output current (I_OUT) through the current-sense (CS) output from DrMOS devices.

The MP2985B is based on unique, digital, multi-phase 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 response, power loop compensation is simple to configure.

The MP2985B is available in a TLGA-40 (5mmx5mm) package.

Features & Benefits

8-Phase, Dual-Loop, Digital Controller
Compliant with VR14 and Earlier Protocols
PMBus/I²C Compliant
AVSBus Compliant
Selectable High-Speed Bus: SVID or PVID
Up to 3MHz Switching Frequency (f_SW)
Multi-Configuration via Pin Strap
Built-In Non-Volatile Memory (NVM) to Store Custom Configurations
Minimal External Components
Overshoot Reduction with Nonlinear Control
Flexible Phase Assignment for Dual Rails
APS to Improve Overall Efficiency
Phase-to-Phase Active Current Balancing with Configurable Offsets for Thermal Balance
Digital Load-Line Regulation
DrMOS Fault Detection, and Faults are Automatically Recorded to the NVM
Supports Overclocking Mode
Line-Float Detection
Standby Mode to Save Power
Input Voltage (V_IN), Output Voltage (V_OUT), Current, Power, and Regulator Temperature Monitoring
Under-Voltage Lockout (UVLO), Over-Voltage Ptoection (OVP), Under-Voltage Protection (UVP), Over-Current Protection (OCP), Under-Current Protection (UCP), Over-Temperature Protection (OTP), and Reverse-Voltage Protection (RVP) with Options for No Action, Latch-Off, Retry, or Hiccup Mode
Enhanced Register Map with Read/Write Protection for Improved Security
Available in a TLGA-40 (5mmx5mm) Package