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Low-Voltage DDR Linear Regulator

Low-Cost, Low-Voltage DDR Linear Regulator Sources and Sinks Up to 3A Peak (typ) Using Internal n-Channel MOSFETs

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

Technical Docs

Data Sheet Low-Voltage DDR Linear Regulator Mar 17, 2010

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Key Features

  • Internal Power MOSFETs with Current Limit (3A typ)
  • Fast Load-Transient Response
  • External Reference Input with Reference Output Buffer
  • 1.1V to 3.6V Power Input
  • ±15mV (max) Load-Regulation Error
  • Thermal-Fault Protection
  • Shutdown Input
  • Power-Good Window Comparator with 2ms (typ) Delay
  • Small, Low-Profile, 10-Pin, 3mm x 3mm TDFN Package
  • Ceramic or Polymer Output Capacitors

Applications/Uses

  • Active Termination Buses
  • Chipset/RAM Supplies as Low as 0.5V
  • DDR Memory Termination
  • Graphics Processor Core Supplies
  • Notebook/Desktop Computers

Description

The MAX8794 DDR linear regulator sources and sinks up to 3A peak (typ) using internal n-channel MOSFETs. This linear regulator delivers an accurate 0.5V to 1.5V output from a low-voltage power input (VIN = 1.1V to 3.6V). The MAX8794 uses a separate 3.3V bias supply to power the control circuitry and drive the internal n-channel MOSFETs.

The MAX8794 provides current and thermal limits to prevent damage to the linear regulator. Additionally, the MAX8794 generates a power-good (PGOOD) signal to indicate that the output is in regulation. During startup, PGOOD remains low until the output is in regulation for 2ms (typ). The internal soft-start limits the input surge current.

The MAX8794 powers the active-DDR termination bus that requires a tracking input reference. The MAX8794 can also be used in low-power chipsets and graphics processor cores that require dynamically adjustable output voltages. The MAX8794 is available in a 10-pin, 3mm x 3mm, TDFN package.

Simplified Block Diagram

MAX8794: Typical Operating Circuit MAX8794: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet Low-Voltage DDR Linear Regulator Mar 17, 2010

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 .