ADP124

RECOMMENDED FOR NEW DESIGNS

5.5V Input, 500 mA, Low Quiescent Current, CMOS Linear Regulator with 31 Fixed-output Voltages

Data Sheet (Rev. D) Product Selection Table

Part Models: 13
1ku List Price: Starting From $0.54

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Overview

Input voltage supply range: 2.3 V to 5.5 V
500 mA maximum output current
Fixed and adjustable output voltage versions
1% initial accuracy

Very low dropout voltage: 130 mV
Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V
See datasheet for additional features

The ADP124 / ADP125 are low quiescent current, low dropout linear regulators. They are designed to operate from an input voltage between 2.3 V and 5.5 V and to provide up to 500 mA of output current. The low 130 mV dropout voltage at a 500 mA load improves efficiency and allows operation over a wide input voltage range.

The low 210 μA of quiescent current with a 500 mA load makes the ADP124 / ADP125 ideal for battery-operated portable equipment. The ADP124 is capable of 31 fixed-output voltages from 1.75 V to 3.3 V. The ADP125 is the adjustable version of the device and allows the output voltage to be set between 0.8 V and 5.0 V by an external voltage divider. The ADP124/ADP125 are specifically designed for stable operation with tiny 1 μF ceramic input and output capacitors to meet the requirements of high performance, space constrained applications.

The ADP124 / ADP125 have an internal soft start that gives a constant start-up time of 350 μs. Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP124 / ADP125 are available in an 8-lead exposed paddle MSOP package. When compared with the standard MSOP package, the exposed paddle MSOP package has lower thermal resistance (θ_JA). The lower thermal resistance package allows the ADP124 / ADP125 to meet the needs of a variety of portable applications while minimizing the rise in junction temperature.

APPLICATIONS

Digital camera and audio devices
Portable and battery-powered equipment
Automatic meter reading (AMR) meters
GPS and location management units
Medical instrumentation
Point of load power

Part Models: 13
1ku List Price: Starting From $0.54

Documentation

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
ADP124ACPZ-1.8-R7	8-Lead LFCSP (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ACPZ-2.8-R7	8-Lead LFCSP (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ACPZ-2.9-R7	8-Lead LFCSP (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ACPZ-3.0-R7	8-Lead LFCSP (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ACPZ-3.3-R7	8-Lead LFCSP (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-1.8-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-2.5-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-2.7-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-2.8-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-2.85-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-2.9-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-3.0-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP124ARHZ-3.3-R7	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 8, 2022 - 22_0192 Qualification of an Alternate Adhesive Material and Molding Compound for Select LFCSP Packages
		PCN22_0192_Form Material_Report Detailed Change Description Qualification Results Summary
ADP124ACPZ-1.8-R7	PRODUCTION
ADP124ACPZ-2.8-R7	PRODUCTION
ADP124ACPZ-2.9-R7	PRODUCTION
ADP124ACPZ-3.0-R7	PRODUCTION
ADP124ACPZ-3.3-R7	PRODUCTION
Oct 18, 2016 - 16_0036 Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select LFCSP Products
		PCN16_0036_Form Material_Report Qualification Results Summary Qualification Results Summary Qualification Results Summary Test Correlation Report
ADP124ACPZ-1.8-R7	PRODUCTION
ADP124ACPZ-2.8-R7	PRODUCTION
ADP124ACPZ-2.9-R7	PRODUCTION
ADP124ACPZ-3.0-R7	PRODUCTION
ADP124ACPZ-3.3-R7	PRODUCTION
Aug 6, 2014 - 13_0244 Assembly and Test Transfer of Select 2x2 and 1.6x1.6 mm Mini-LFCSP Products to STATS ChipPAC China
		PCN13_0244_Form Material_Report Detailed Change Description Qualification Results Summary Test Correlation Report
ADP124ACPZ-1.8-R7	PRODUCTION
ADP124ACPZ-2.8-R7	PRODUCTION
ADP124ACPZ-2.9-R7	PRODUCTION
ADP124ACPZ-3.0-R7	PRODUCTION
ADP124ACPZ-3.3-R7	PRODUCTION
Jan 5, 2015 - 14_0246 Qualification of ASE Chungli, as an Alternate Assembly Site for Select MSOP Devices
		PCN14_0246_Form Material_Report Detailed Change Description Qualification Results Summary
ADP124ARHZ-1.8-R7	PRODUCTION
ADP124ARHZ-2.5-R7	PRODUCTION
ADP124ARHZ-2.7-R7	PRODUCTION
ADP124ARHZ-2.8-R7	PRODUCTION
ADP124ARHZ-2.85-R7	PRODUCTION
ADP124ARHZ-2.9-R7	PRODUCTION
ADP124ARHZ-3.0-R7	PRODUCTION
ADP124ARHZ-3.3-R7	PRODUCTION

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

Software Resources

Device Drivers 1

ADP150 Regulator Fixed Voltage Linux Driver

Can't find the software or driver you need?

Hardware Ecosystem

Parts	Product Life Cycle	Description
LT1763	RECOMMENDED FOR NEW DESIGNS	500mA, Low Noise, LDO Micropower Regulators
LT3085	RECOMMENDED FOR NEW DESIGNS	Adjustable 500mA Single Resistor Low Dropout Regulator

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

ADP124-1.8
ADP124-2.5
ADP124-2.7
ADP124-2.8
ADP124-2.85
ADP124-2.9
ADP124-3.0
ADP124-3.3

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

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

ADP124 Evaluation Board

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Features and Benefits

Two fully assembled and tested evaluation boards per kit
Full set of IC voltage options in each kit
3 samples of each IC voltage option packed in separate antistatic bags
Kit allows the user to quickly evaluate all IC voltage options
Only need to order one kit per product family

Product Details

This product has individual evaluations boards at specific voltages or with specific features as well as the RedyKit™. The RedyKit simplifies product evaluation by providing two assembled and tested evaluation boards, plus a full set of product (voltage) options for an IC regulator. All the IC options come sorted and stored in the kit with the Analog Devices part number clearly printed on each antistatic zip-top bag.

Simple device measurements such as line and load regulation, dropout, and ground current can be demonstrated with just a single voltage supply, a voltmeter, a current meter, and load resistors.

Resources

UG-056: Setting Up the Evaluation Board for the ADP124/ADP125
3/11/2010

Power Management RedyKit
4/12/2010

UG-148: RedyKit for the ADP124 LDO
8/20/2010

Arduino form factor compatible ARM Cortex-M3 Development Platform

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Features and Benefits

Compatible with Arduino and PMOD form factors
Low Power ARM Cortex M3
Open Source IDE Tools
No External Debugger/Emulator Tools needed

Product Details

The EVAL-ADICUP360 is an Arduino and PMOD compatible form factor development board. The board uses CrossCore Embedded Studio, an open source Eclipse based Interactive Development Environment (IDE), which can be downloaded free of charge. The platform contains many hardware and software example projects, to make it easier for customers to prototype/create systems and solutions using the complete ecosystem provided.

The EVAL-ADICUP360 uses the ADuCM360 Arm Cortex-M3 processor as the main device on board. It has integrated dual 24-bit sigma delta converters on chip, which make it extremely flexible for both analog and digital application.