ADP3309

NOT RECOMMENDED FOR NEW DESIGNS

anyCAP® 100 mA Low Dropout Linear Regulator

Data Sheet (Rev. C) Product Selection Table

Part Models: 3
1ku List Price: Starting From $1.20

Viewing:

Overview

±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

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

Part Models: 3
1ku List Price: Starting From $1.20

Documentation

Data Sheet 1

ADP3309: anyCAP 100 mA Low Dropout Linear Regulator Data Sheet (Rev.C) 09/01/1998

Application Note 2

AN-262: Low-Noise Low Drop-Out Regulator for Portable Equipment 01/01/2000

AN-1072: How to Successfully Apply Low Dropout Regulators 04/27/2010

Frequently Asked Question 1

FAQ 09/05/2025

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADP3309ARTZ-2.5RL7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP3309ARTZ-3.3-R7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP3309ARTZ-3.6-R7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 8, 2025 - 24_0103 Qualification of Wafer Fabrication Site at Analog Devices, Inc. Camas for CBCMOS2 Products
		PCN24_0103_Form Material_Report Delta Qualification Matrix Qualification Results Summary
ADP3309ARTZ-2.5RL7	PRODUCTION
ADP3309ARTZ-3.3-R7	PRODUCTION
ADP3309ARTZ-3.6-R7	PRODUCTION
Feb 4, 2010 - 10_0009 Halogen Free Material Change for SOT_23 Products
		Material_Report PCN10_0009_Form SOT23 Qualification Data
ADP3309ARTZ-2.5RL7	PRODUCTION
ADP3309ARTZ-3.3-R7	PRODUCTION
ADP3309ARTZ-3.6-R7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
ADP7112	RECOMMENDED FOR NEW DESIGNS	20 V, 200 mA, Low Noise, CMOS LDO Linear Regulator

Tools & Simulations

ADI Linear Regulator Design Tool and Parametric Search

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

Open Tool

Latest Discussions

2 Years Ago