Digital Multi-Phase PWM Non-Linear Controller with NVIDIA Open VReg Compatibility
Monolithic Power Systems has introduced the MP2888A, a digital, multi-phase, pulse-width modulation controller with digital PWM-VID interface that is compatible with NVIDIA's Open VReg specification. The MP2888A is available in a QFN-40 (5mm x 5mm) package. It can work with MPS's Intelli-Phase products to complete the multi-phase voltage regulator (VR) solution with minimal external components. The MP2888A can be configured with up to 10-phase operation.
An on-chip EEPROM allows storing and restoring of device configurations. The company says that device configurations and fault parameters can be easily programmed or monitored via the PMBus/I2C interface. The MP2888A can monitor and report the output current through the CS output from the Intelli-Phase products.
MPS based the MP2888A on a unique, digital, multi-phase, non-linear control. It uses a minimal number of output capacitors to deliver fast transient response to the load transient. The device has only one power-loop control method for both steady-state and load-transient. According to MPS, the power-loop compensation is very easy to configure.
Some of the features include flexible phase assignment; auto-phase shedding to improve overall efficiency; phase-to-phase active current balancing with programmable offsets for thermal balance; output Voltage/current, input Voltage/power monitoring; regulator temperature monitoring; and Vin UVLO, Output OVP/UVP, OCP, OTP, with no action, latch, retry, or hiccup mode options.
The device has a Vcc range 3V to 3.6V and an fsw range of 200kHz to 5000kHz. MP2888A has a typical Iq of 30mA and features a shutdown current of 0.15mA.
Features
- Programmable Multi-Phase up to 10 Phases
- PWM-VID Interface Compatible with NVIDIA Open VReg SpecificationMP2888A
- PMBus/I2C Compliant (1MHz Bus Speed)
- Pin Programmable for PMBus Address
- Built-In EEPROM to Store Custom Configurations
- Switching Frequency Range 200kHz to 5MHz
- Automatic Loop Compensation
- Fewer External Components than Conventional Analog Controller
- Best Transient Performance with Non-Linear Digital Control
- Flexible Phase Assignment
- Auto-Phase Shedding to Improve Overall Efficiency
- Phase-to-Phase Active Current Balancing with Programmable Offsets for Thermal Balance
- Output Voltage/Current, Input Voltage/ Power Monitoring
- Regulator Temperature Monitoring
- VIN UVLO, Output OVP/UVP, OCP, OTP with No Action, Latch, Retry, or Hiccup Mode Options
- Detecting for Intelli-Phase MOSFET Fault Type and Auto-Record to EEPROM
- Register Map Password Lock
- Digital Load-Line Regulation
- Available in an RoHS Compliant QFN-40 (5mm x 5mm) Package
