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ADP2109:  Compact 600 mA, 3 MHz, Step-Down Converter with Output Discharge

Product Details


The ADP2109 is a high efficiency, low quiescent current stepdown dc-to-dc converter with an internal discharge switch that allows automatic discharge of the output capacitor in an ultra small 5-ball WLCSP package.

The total solution only requires three tiny external components. It uses a proprietary high-speed current mode, constant frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2109 has a power save mode that reduces the switching frequency under light load conditions.

The ADP2109 runs on input voltages of 2.3 V to 5.5 V, which allow for single lithium or lithium polymer cell, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The maximum load current of 600 mA is achievable across the input voltage range.

The ADP2109 is available in fixed output voltages of 1.8 V, 1.2 V, and 1.0 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2109 has an internal soft start and internal compensation. During logic-controlled shutdown, the input is disconnected from the output and the ADP2109 draws less than 1 μA from the input source.

Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input current overshoot at startup. The ADP2109 is available in a 5-ball WLCSP.

Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input current overshoot at startup. The ADP2109 is available in a 5-ball WLCSP.

The ADP2108 provides the same features and operations as the ADP2109 without the discharge switch and is available in both WLCSP and TSOT packages.


Applications
  • PDAs and palmtop computers
  • Wireless handsets
  • Digital audio, portable media players
  • Digital cameras, GPS navigation units

FEATURES and BENEFITS

  • Peak efficiency: 95%
  • Discharge switch function
  • Fixed frequency operation: 3 MHz
  • Typical quiescent current: 18 μA
  • Maximum load current: 600 mA
  • Input voltage: 2.3 V to 5.5 V
  • Uses tiny multilayer inductors and capacitors
  • Current mode architecture for fast load and line transient response
  • 100% duty-cycle low-dropout mode
  • Internal synchronous rectifier
  • Internal compensation
  • For additional features please see the data sheet

Typical Application Diagram for ADP2109

Documentation

Title Content Type File Type
ADP2109: Compact 600 mA, 3 MHz, Step-Down Converter with Output Discharge Data Sheet (Rev B, 07/2012) (pdf, 1233 kB) Data Sheets PDF
Isolating Power in Communication Bus and Gate Drive Applications
Starting with a communications application overview of small power options through the process of selecting the right power products this webcast is a great resource for your communications applications designs.
Webcasts WEBCAST
Understanding How Voltage Regulators Work Technical Articles HTML
ADP1829, ADP210x, ADP171x Reference Design  (pdf, 447 kB)
Seven Output Voltages: 5.0 V, 3.6 V, 3.3 V, 2.5 V, 1.8 V, 1.2 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829, ADP210x and ADP171x Reference Design  (pdf, 687 kB)
Seven Output Voltages: 3.6 V, 3.3 V,3.3l V 2.5 V, 1.8 V, 1.25 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADP21xx Buck Regulator Design Tool  (zip, 0)
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
ADIsim Design/Simulation Tools ZIP
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML
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.
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

ADP2109 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2109ACBZ-1.0-R7 Status: Production 5 Ball WLCSP 5 Ind Reel, 3000 - $0.70 Y  Material Info PCN Purchase Sample
ADP2109ACBZ-1.2-R7 Status: Production 5 Ball WLCSP 5 Ind Reel, 3000 - $0.70 Y  Material Info PCN Purchase Sample
ADP2109ACBZ-1.5-R7 Status: Production 5 Ball WLCSP 5 Ind Reel, 3000 - $0.70 Y  Material Info PCN Purchase Sample
ADP2109ACBZ-1.8-R7 Status: Production 5 Ball WLCSP 5 Ind Reel, 3000 - $0.70 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.

ADP2109 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2109CB-1.8EVALZ 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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