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Single Quick-PWM Step-Down Controller with Internal 26V MOSFETs

Provides an Excellent Transient Response and High DC-Output Accuracy Needed for Stepping Down High Voltages

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Quick-PWM with Fast-Transient Response
  • 6mΩ, 26V Low-Side MOSFET
  • 12mΩ, 26V High-Side MOSFET
  • Supports Any Output Capacitor
    • No Compensation Required with Polymers/Tantalum
    • Stable with Ceramic Output Capacitors using External Compensation
  • Precision 2V ±10mV Reference
  • Dynamically Adjustable Output Voltage (0 to 0.9VIN Range)
    • Feedback Input Regulates from 0 to 2V REFIN Voltage
    • 0.5% VOUT Accuracy Over Line and Load
  • 26V Maximum Input Voltage Rating
  • Adjustable Valley Current-Limit Protection
    • Thermal Compensation with NTC
    • Supports Foldback Current Limit
  • Resistively Programmable Switching Frequency
  • Overvoltage Protection
  • Undervoltage/Thermal Protection
  • Voltage Soft-Start and Soft-Shutdown
  • Monotonic Power-Up with Precharged Output
  • Power-Good Window Comparator

Applications/Uses

  • DDR Memory—VDDQ or VTT
  • GPU Core Supply
  • I/O and Chipset Supplies
  • Notebook Computers
  • Point-of-Load Applications
  • Step-Down Power Supply

Description

The MAX17016 pulse-width-modulation (PWM) controller provides high efficiency, excellent transient response, and high DC-output accuracy needed for stepping down high-voltage batteries to generate low-voltage core or chipset/RAM bias supplies in notebook computers. Combined with low on-resistance MOSFETs (6mΩ, low-side MOSFET and 12mΩ high-side MOSFET), the MAX17016 provides a highly efficient and compact solution for small form factor applications that need a high-power density.

Maxim’s proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios (low-duty-cycle applications) with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency. The output voltage can be dynamically controlled using the dynamic REFIN, which supports input voltages between 0 to 2V. The REFIN adjustability combined with a resistive voltage-divider on the feedback input allows the MAX17016 to be configured for any output voltage between 0 to 0.9VIN.

The controller senses the current across the 6mΩ synchronous rectifier to achieve a low-cost and highly efficient valley current-limit protection. External current-limit control is still provided to allow higher current-limit settings for applications with heatsinks and air flow, or for lower current applications that need lower current-limit settings to avoid overdesigning the application circuit. The adjustable current limit provides a high degree of flexibility, allowing thermally compensated protection or foldback current-limit protection using a voltage-divider partially derived from the output.

The MAX17016 includes a voltage-controlled soft-start and soft-shutdown in order to limit the input surge current, provide a monotonic power-up (even into a precharged output), and provide a predictable power-up time. The controller also includes output fault protection—undervoltage and overvoltage protection—as well as thermal-fault protection.

The MAX17016 is available in a small 40-pin, 6mm × 6mm, 2W TQFN package.

Simplified Block Diagram

MAX17016: Block Diagram MAX17016: Block Diagram 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.