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ADP2147:  Compact, 800 mA, 3 MHz, Simple DVS, Buck Regulator

Product Details

Product Status:Recommended for New Designs

The ADP2147 is a high efficiency, low quiescent current, step-down (buck) dc-to-dc regulator with an output voltage that can be switched between two different settings under the control of a select pin. The total solution requires only three tiny external components.

The buck regulator automatically switches operating modes, depending on the load current level, to maximize efficiency. At high output loads, the buck regulator operates in PWM mode. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving the light-load efficiency.

The ADP2147 runs on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cells, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The maximum load current of 800 mA is achievable across the input voltage range.

The ADP2147 is available with fixed output voltages from 0.8 V to 3.3 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2147 has an internal soft start and is internally compensated. During logic controlled shutdown, the input is disconnected from the output, and the ADP2147 draws less than 0.2 μA (typical) from the power source.

Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input current over-shoot at startup. The ADP2147 is available in a 6-ball WLCSP.

APPLICATIONS

  • PDAs and palmtop computers
  • Wireless handsets
  • Digital audio portable media players
  • Digital cameras, GPS navigation units
  • Low power portable medical equipment

FEATURES and BENEFITS

  • Input voltage: 2.3 V to 5.5 V
  • Peak efficiency: 95%
  • 3 MHz fixed frequency operation
  • Low quiescent current: 23 μA
  • Ultralow shutdown current:
    0.2 μA (typical)
  • VSEL pin for simple dynamic voltage scaling (DVS)
  • 100% duty cycle low dropout mode
  • Internal synchronous rectifier, compensation, and soft start
  • Current overload and thermal shutdown protection
  • Small, 6-ball, 1 mm x 1.5 mm WLCSP package

Functional Block Diagram for ADP2147

Documentation

Title Content Type File Type
ADP2147: Compact, 800 mA, 3 MHz, Simple DVS, Buck Regulator Data Sheet (Rev 0, 05/2011) (pdf, 548 kB) Data Sheets PDF
Introduction to ADIsimPower
ADIsimPower is a smart selector and a collection of downloadable tools that produce complete and optimized power designs. Schematic, bill of materials, and performance data are customized to your specific needs in minutes.
Videos HTML
UG-270: Evaluation Board for the 800 mA, 3 MHz Buck Regulator  (pdf, 190 kB) User Guides PDF
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML
Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
Vin (max) V Iout A

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADP2147 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2147ACBZ-110-R7 Status: Production 6 Ball WLCSP (1.51x1.3mm) 6 Ind Reel, 3000 - $0.90 Y  Material Info PCN Purchase Sample
ADP2147ACBZ-130-R7 Status: Production 6 Ball WLCSP (1.51x1.3mm) 6 Ind Reel, 3000 - $0.90 Y  Material Info PCN Purchase Sample
ADP2147ACBZ-150-R7 Status: Production 6 Ball WLCSP (1.51x1.3mm) 6 Ind Reel, 3000 - $0.90 Y  Material Info PCN Purchase Sample
ADP2147ACBZ-170-R7 Status: Production 6 Ball WLCSP (1.51x1.3mm) 6 Ind Reel, 3000 - $0.90 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.

ADP2147 Evaluation Boards
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2147CB-110EVALZ Status: Production Evaluation Board $60.00 Yes -
ADP2147CB-130EVALZ Status: Production Evaluation Board $60.00 Yes -
ADP2147CB-150EVALZ Status: Production Evaluation Board $60.00 Yes -
ADP2147CB-170EVALZ 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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