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  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. MAX15051

Data Sheet Rev. 2
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Overview

Features and Benefits

  • Internal 18mΩ RDS(ON) MOSFETs
  • Pulse-Skip Mode for High-Efficiency Light Load (MAX15050)
  • Continuous 4A Output Current
  • ±1% Output-Voltage Accuracy Over Load, Line, and Temperature
  • Operates from 2.9V to 5.5V Supply
  • Adjustable Output from 0.6V to (0.9 x VIN)
  • Adjustable Soft-Start Reduces Inrush Supply Current
  • Factory-Trimmed 1MHz Switching Frequency
  • Compatible with Ceramic, Polymer, and Electrolytic Output Capacitors
  • Safe Startup Into Prebias Output
  • Enable Input/Power-Good Output
  • Fully Protected Against Overcurrent and Overtemperature
  • Overload Hiccup Protection
  • Sink/Source Current for DDR Applications
  • 2mm x 2mm, 16-Bump (4 x 4 Array), 0.5mm Pitch WLP Package

Product Details

The MAX15050/MAX15051 high-efficiency switching regulators deliver up to 4A load current at output voltages from 0.6V to (0.9 x VIN). The devices operate from 2.9V to 5.5V, making them ideal for on-board point-of-load and postregulation applications. Total output-voltage accuracy is within ±1% over load, line, and temperature.

The MAX15050/MAX15051 feature 1MHz fixed-frequency PWM operation. The MAX15050 features pulse-skip mode to improve light-load efficiency. The MAX15050 soft-starts in a monotonic mode and then operates in the forced PWM mode or pulse-skip mode depending on the output load current condition. The MAX15051 soft-starts in the monotonic mode and operates in the forced PWM mode. The high operating frequency allows for small-size external components.

The low-resistance on-chip nMOS switches ensure high efficiency at heavy loads while minimizing critical parasitic inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.

The MAX15050/MAX15051 incorporate a high-bandwidth (> 26MHz) voltage-error amplifier. The voltage-mode control architecture and the voltage-error amplifier permit a type III compensation scheme to achieve maximum loop bandwidth, up to 200kHz. High loop bandwidth provides fast transient response, resulting in less required output capacitance and allowing for all-ceramic capacitor designs.

The MAX15050/MAX15051 feature an output overload hiccup protection and peak current limit on both high-side and low-side MOSFETs. These features provide for ultra-safe operation in the cases of short-circuit conditions, severe overloads, or in converters with bulk electrolytic capacitors.

The MAX15050/MAX15051 feature an adjustable output voltage. The output voltage is adjustable by using two external resistors at the feedback or by applying an external reference voltage to the REFIN/SS input. The MAX15050/MAX15051 offer programmable soft-start time using one capacitor to reduce input inrush current. A built-in thermal shutdown protection assures safe operation under all conditions. The MAX15050/MAX15051 are available in a 2mm x 2mm, 16-bump (4 x 4 array), 0.5mm pitch WLP package.

Applications

  • ASIC/CPU/DSP Core and I/O Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • Point-of-Load
  • Portable Applications
  • RAID Control Power Supplies
  • Server Power Supplies
  • Telecom and Networking Power Supplies

Product Categories

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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 (2)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Technical Articles (2)
    • Document Type

    Tools & Simulations

    EE-Sim® Power Tools

    The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

    EESim-Pdp-Spotlight

    SIMPLIS Models

    ZIP
    701.17K
    MAXREFDES1142 SIMPLIS Schematic

    MAXREFDES1142 SIMPLIS Schematic

    ZIP
    378.02K
    MAX15051 SIMPLIS Schematic

    MAX15051 SIMPLIS Schematic

    Reference Designs (1)

    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    MAX15051EWE+ Material Declaration Reliability Data Wafer-Level Package 4x4 Bump, Full Array
    MAX15051EWE+T Material Declaration Reliability Data Wafer-Level Package 4x4 Bump, Full Array
    Wafer Fabrication Data MAX15051 Reliability Data

    Support & Discussions

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    MAX15051 Contact ADI Technical Support » MAX15051 Ask your question »

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