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ADP3309:  anyCAP® 100 mA Low Dropout Linear Regulator

Product Details


The ADP3309 is a member of the ADP330x family of precision low dropout anyCAP voltage regulators. It is pin-for-pin and functionally compatible with National’s LP2981, but offers performance advantages. The ADP3309 stands out from conventional LDOs with a novel architecture and an enhanced process. Its patented design requires only a 0.47 μF output capacitor for stability. This device is stable with any type of capacitor regardless of its equivalent series resistance (ESR) value, including ceramic types for space restricted applications. The ADP3309 achieves ±1.2% accuracy at room temperature and ±2.2% overall accuracy over temperature, line, and load regulations. The dropout voltage of the ADP3309 is only 120 mV (typical) at 100 mA. This device also includes a current limit and a shutdown feature. In shutdown mode, the ground current is reduced to ~1 μA.

The ADP3309 operates with a wide input voltage range from 2.8 V to 12 V and delivers a load current in excess of 100 mA. The ADP3309 anyCAP LDO offers a wide range of output voltages.

Applications

  • Cellular telephones
  • Notebook, palmtop computers
  • Battery-powered systems
  • PCMCIA regulator
  • Bar code scanners
  • Camcorders, cameras

FEATURES and BENEFITS

  • ±1.2% accuracy over line and load regulations @ 25°C
  • Ultralow dropout voltage: 120 mV typical @ 100 mA
  • Requires only COUT = 0.47 μF for stability
  • anyCAP LDOs are stable with all types of capacitors (including MLCC)
  • Current and thermal limiting
  • Low noise
  • Low shutdown current: 1 μA
  • 2.8 V to 12 V supply range
  • −20°C to +85°C ambient temperature range
  • Several fixed voltage options
  • Ultrasmall 5-lead SOT-23 package
  • Excellent line and load regulations

Functional Block Diagram for ADP3309

Documentation

Title Content Type File Type
ADP3309: anyCAP 100 mA Low Dropout Linear Regulator Data Sheet  (Rev C, 12/2006) (pdf, 341 kB) Data Sheets PDF
AN-1072: How to Successfully Apply Low Dropout Regulators  (pdf, 105 kB)
This application note reviews the basic LDO topology, explains key specifications, and shows the application of low dropout voltage regulators in systems.
Application Notes PDF
AN-262: Low-Noise Low Drop-Out Regulator for Portable Equipment  (pdf, 341 kB) Application Notes PDF
The Fundamentals of LDO Design and Applications Technical Articles HTML
Linear Regulators Parametric Search Product Selection Guide HTML
RAQs index Rarely Asked Questions HTML
What are LDOs and how are they used? FAQs/RAQs HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADI Linear Regulator Design Tool and Parametric Search  (zip)
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
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

ADP3309 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP3309ARTZ-2.5RL7 Status: Production 5 ld SOT-23 5 Ind Reel, 3000 - $0.70 Y  Material Info PCN Purchase Sample
ADP3309ARTZ-2.7-R7 Status: Obsolete 5 ld SOT-23 5 Ind Reel, 3000 - - Y  Material Info PCN Contact ADI
ADP3309ARTZ-2.85R7 Status: Obsolete 5 ld SOT-23 5 Ind Reel, 3000 - - Y  Material Info PCN Contact ADI
ADP3309ARTZ-2.9-R7 Status: Obsolete 5 ld SOT-23 5 Ind Reel, 3000 - - Y  Material Info PCN Contact ADI
ADP3309ARTZ-3.3-R7 Status: Production 5 ld SOT-23 5 Ind Reel, 3000 - $0.70 Y  Material Info PCN Purchase Sample
ADP3309ARTZ-3.6-R7 Status: Production 5 ld SOT-23 5 Ind Reel, 3000 - $0.70 Y  Material Info PCN Purchase Sample
ADP3309ARTZ-3REEL7 Status: Production 5 ld SOT-23 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.


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