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  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Multiple Output Buck Regulators
  6. ADP5135

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Overview

Features and Benefits

  • Main input voltage range: 3.0 V to 5.5 V
  • Three 1800 mA buck regulators
  • 24-lead, 4 mm × 4 mm LFCSP package
  • Regulator accuracy: ±1.8%
  • Factory programmable or external adjustable VOUTx
  • Precision Enables for easier power sequencing
  • Power Good Pins for monitoring of each regulator
  • 3 MHz buck operation with forced PWM and auto PWM/PSM modes
  • BUCK1/BUCK2/BUCK3: output voltage range from 0.8 V to 3.8 V

Product Details

The ADP5135 combines three high performance buck regulators. It is available in a 24-lead 4 mm × 4 mm LFCSP.

The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set to high, the buck regulators operate in forced PWM mode. When the MODE pin is set to low, the buck regulators operate in PWM mode only when the load is above a predefined threshold. When the load current falls below this predefined threshold, the regulator operates in power save mode (PSM), improving the light load efficiency.

Buck1 and Buck2 operate in sync and Buck3 operates out of phase to reduce the input capacitor requirement. Regulators in the ADP5135 are activated through dedicated enable pins. The default output voltages can be externally set in the adjustable version, or factory programmable to a wide range of preset values in the fixed voltage version.

Applications

  • Power for processors, ASICS, FPGAs, and RF chipsets
  • Portable instrumentation and medical devices
  • Space constrained devices

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This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Documentation & Resources

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  • Data Sheets (1)
  • User Guides (1)
    • Document Type

    Tools & Simulations

    Design Tools

    5V uPMU BuckDesigner

    Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

    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
    ADP5135ACPZ-R7 Material Declaration Reliability Data 24-Lead LFCSP (4mm x 4mm w/ EP)
    Wafer Fabrication Data

    Support & Discussions

    ADP5135 Discussions

    RE: ADP5135 start-up time
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