Data Sheet Rev. 0
CN Rev. 0 | JP Rev. 0

Overview

Features and Benefits

  • Low-Cost Current-Mode Controllers
  • Fixed-Frequency PWM
  • MAX1953
    • 1MHz Switching Frequency
    • Small Component Size, Low Cost
    • Adjustable Current Limit
  • MAX1954
    • 3V to 13.2V Input Voltage
    • 25A Output Current Capability
    • 93% Efficiency
    • 300kHz Switching Frequency
  • MAX1957
    • Tracking 0.4V to 0.86VIN Output Voltage Range Sinking and Sourcing Capability of 3A
  • Shutdown Feature
  • All N-Channel MOSFET Design for Low Cost
  • No Current-Sense Resistor Needed
  • Internal Digital Soft-Start
  • Thermal Overload Protection
  • Small 10-Pin µMAX Package

Product Details

The MAX1953/MAX1954/MAX1957 is a family of versatile, economical, synchronous current-mode, pulse-width modulation (PWM) buck controllers. These step-down controllers are targeted for applications where cost and size are critical.

The MAX1953 operates at a fixed 1MHz switching frequency, thus significantly reducing external component size and cost. Additionally, excellent transient response is obtained using less output capacitance. The MAX1953 operates from low 3V to 5.5V input voltage and can supply up to 10A of output current. Selectable current limit is provided to tailor to the external MOSFETs' on-resistance for optimum cost and performance. The output voltage is adjustable from 0.8V to 0.86VIN.

With the MAX1954, the drain-voltage range on the high- side FET is 3V to 13.2V and is independent of the supply voltage. It operates at a fixed 300kHz switching frequency and can be used to provide up to 25A of output current with high efficiency. The output voltage is adjustable from 0.8V to 0.86VHSD.

The MAX1957 features a tracking output voltage range of 0.4V to 0.86VIN and is capable of sourcing or sinking current for applications such as DDR bus termination and PowerPC®/ASIC/DSP core supplies. The MAX1957 operates from a 3V to 5.5V input voltage and at a fixed 300kHz switching frequency.

The MAX1953/MAX1954/MAX1957 provide a COMP pin that can be pulled low to shut down the converter in addition to providing compensation to the error amplifier. An input undervoltage lockout (UVLO) is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFETs from overheating. Internal digital soft-start is included to reduce inrush current. The MAX1953/MAX1954/MAX1957 are available in tiny 10-pin µMAX packages.

Applications

  • Graphic Cards and Video Cards
  • Low-Voltage Distributed Power
  • Microprocessor Core Supplies
  • PCs and Servers
  • Printers and Scanners
  • Telecommunications and Networking

Product Categories

Comparable Parts Click to see all in Parametric Search

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Documentation & Resources

  • View All (3)
  • Data Sheets (1)
  • Reliability Data (1)
  • Design Notes (1)
    • Document Type

    Product Recommendations

    MAX1954 Companion Parts

    Recommended Related Parts

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

    MAX1954 Material Declaration
    Quality And Reliability
    Symbols and Footprints

    PCN-PDN Information

    Select Model
    • MAX1954EUB+ Production
    • MAX1954EUB+T Production

    Support & Discussions

    MAX1954 Contact ADI Technical Support »
    MAX1954 Ask your question »
    MAX1954 Contact ADI Technical Support » MAX1954 Ask your question »

    Sample & Buy


    Ordering FAQs


    See our Ordering FAQs for answers to questions about online orders, payment options and more.

     

    Buy Now Pricing


    (**) Displayed Buy Now Price and Price Range is based on small quantity orders.

     

    List Pricing


    (*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

     

    Lead Times


    Please see the latest communication from our CCO regarding lead times.

     

    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.


    Price Table Help