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ADP2126:  Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC, BUMP_CHIP

Product Details

Product Status:Recommended for New Designs

The ADP2126/ ADP2127 are high frequency, step-down, dc-to-dc converters optimized for portable applications in which board area and battery life are critical constraints. The fixed 6 MHz operating frequency enables the use of tiny ceramic inductors and capacitors and the regulators use spread spectrum frequency modulation to reduce EMI. Additionally, synchronous rectification improves efficiency and results in fewer external components.

At high load currents, the ADP2126/ADP2127 use a voltage regulating pulse-width modulation (PWM) mode that maintains a constant frequency with excellent stability and transient response. Light load operation is determined by the state of the MODE pin. In forced PWM mode, the converter continues operating in PWM for light loads. Under light load conditions in auto mode, the ADP2126/ADP2127 automatically enter a power-saving mode, which uses pulse frequency modulation (PFM) to reduce the effective switching frequency, thus ensuring the longest battery life in portable applications.

The ADP2126/ADP2127 are enabled by a 6 MHz to 27 MHz external clock signal applied to the EXTCLK pin. Certain models can also be enabled with a logic high signal. When the external clock is not switching and in a low logic state, the ADP2126/ADP2127 stop regulating and shut down to draw less than 0.3 μA (typical) from the source.

The ADP2126/ADP2127 have an input voltage range of 2.1 V to 5.5 V, allowing the use of single Li+/Li polymer cell, three-cell alkaline, NiMH cell, and other standard power sources. The ADP2126/ADP2127 are internally compensated to minimize external components and can source up to 500 mA. Other key features, such as cycle-by-cycle peak current limit, soft start, undervoltage lockout (UVLO), output-to-ground short-circuit protection, and thermal shutdown provide protection for internal and external circuit components.

  • Mobile phones
  • Digital still/video cameras
  • Digital audio
  • Portable equipment
  • Camera modules
  • Image stabilization systems


  • 1.20 V and 1.26 V fixed output voltage options
  • Clock signal enable
    -- Logic signal enable also available on certain models
  • 6 MHz operating frequency
  • Spread spectrum frequency modulation to reduce EMI
  • 500 mA continuous output current
  • Input voltage: 2.1 V to 5.5 V
  • 0.3 μA (typical) shutdown supply current
  • Pin-selectable power-saving mode
  • Compatible with tiny multilayer inductors
  • Internal synchronous rectifier
  • Internal compensation
  • See data sheet for additional features

Typical Application Circuit for ADP2126


Title Content Type File Type
ADP2126/ADP2127: Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters Data Sheet (Rev B, 03/2012) (pdf, 1545 kB) Data Sheets PDF
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UG-300: Evaluating the ADP2126/ADP2127 Ultralow Profile, 6 MHz, Step-Down Converters  (pdf, 174 kB) User Guides PDF
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Design Tools,Models,Drivers & Software

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Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
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ADIsimPower™ Voltage Regulator Design Tool
This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.
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Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

ADP2126 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADP2126ACDZ-1.20R7 Status: Production BUMPED BARE DIE SALES 6 Ind Reel, 3000 - $0.80 Y  Material Info PCN Purchase Sample
Price Table Help

The USA 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. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADP2126 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADP2126-1.2-EVALZ Status: Production Evaluation Board $60.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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