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AMD Mobile Serial VID Dual-Phase Fixed-Frequency Controller

Two-Phase Fixed-Frequency Controller for AMD's Serial VID Interface (SVI) CPU Core Supplies

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Dual-Output, Fixed-Frequency, Core Supply Controller
  • Separate or Combinable Outputs Detected at Power-Up
  • Reference Buffer Output for NB Controller
  • ±0.4% VOUT Accuracy Over Line, Load, and Temperature
  • AMD SVI-Compliant Serial Interface
  • 7-Bit On-Board DAC: 0 to +1.550V Output Adjust Range
  • Dynamic Phase Selection Optimizes Active/Sleep Efficiency
  • Transient Phase Repeat Reduces Output Capacitance
  • True Out-of-Phase Operation Reduces Input Capacitance
  • Integrated Boost Switches
  • Programmable AC and DC Droop
  • Programmable 100kHz to 1.2MHz Switching Frequency
  • Accurate Current Balance and Current Limit
  • Adjustable Slew-Rate Control
  • Power-Good (PWRGD) and Thermal-Fault (Active-Low VRHOT) Outputs
  • System Power-OK (PGD_IN) Input
  • Drives Large Synchronous-Rectifier MOSFETs
  • 4V to 26V Battery Input-Voltage Range
  • Overvoltage, Undervoltage, and Thermal-Fault Protection
  • Power Sequencing and Timing
  • Soft-Startup and Soft-Shutdown
  • < 1µA Typical Shutdown Current

Applications/Uses

  • Mobile AMD SVI Core Supply
  • Multiphase CPU Core Supply
  • Notebook/Desktop Computers
  • Voltage-Positioned, Step-Down Converters

Description

The MAX17009 is a two-phase, step-down interleaved, fixed-frequency controller for AMD's serial VID interface (SVI) CPU core supplies. Power-on detection of the CPU configures the MAX17009 as two independent single-phase regulators for a dual CPU core application, or one high-current, dual-phase, combined-output regulator for a unified core application. A reference buffer output (NBV_BUF) sets the voltage-regulation level for a North Bridge (NB) regulator, completing the total CPU cores and NB power requirements.

The MAX17009 is fully AMD SVI compliant. Output voltages are dynamically changed through a 2-wire serial interface, allowing the switching regulator and the reference buffer to be individually programmed to different voltages. A programmable slew-rate controller enables controlled transitions between VID codes, soft-start limits the inrush current, and soft-shutdown brings the output voltage back down to zero without any negative ring.

Transient phase repeat improves the response of the fixed-frequency architecture. Independently programmable AC and DC droop and selectable offset improve stability and reduce the total output-capacitance requirement. A thermistor-based temperature sensor allows for a programmable thermal-fault output (active-low VRHOT). The MAX17009 includes thermal-fault protection, undervoltage protection (UVP), and selectable output overvoltage protection (OVP). When any of these protection features detect a fault, the controller shuts down. True differential current sensing improves current limit, load-line accuracy, and current balance when operating in combined mode. The MAX17009 has an adjustable switching frequency, allowing 100kHz to 1.2MHz per-phase operation.

Simplified Block Diagram

MAX17009: Pin Configuration MAX17009: Pin Configuration Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.