MAX17016

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


Please check latest availability status for a specific part variant.

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.
MAX17016: Block Diagram MAX17016: Block Diagram Enlarge+

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

MAX17016EVKIT: Evaluation Kit for the MAX17016
Request Reliability Report for: MAX17016 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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