ADP171

PRODUCTION

300 mA, Low Quiescent Current, adjustable output, CMOS Linear Regulator

Data Sheet (Rev. C) Product Selection Table

Part Models: 2
1ku List Price: Starting From $0.44

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Overview

Maximum output current: 300 mA
Input voltage range: 1.6 V to 3.6 V
Low quiescent current
I_GND = 23 μA with 0 mA load
I_GND = 170 μA with 300 mA load
Low shutdown current: <1 μA
Low dropout voltage: 66 mV at 300 mA load
Up to 31 fixed-output voltage options available from 0.8 V to 3.0 V

Output voltage accuracy: ±1%
Adjustable-output voltage options
0.8 V to 3.0 V (ADP171)
Accuracy over line, load, and temperature: ±3%
Stable with small 1 μF ceramic output capacitor
PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz
See data sheet for additional features

The ADP170 / ADP171 / ADP172 are low voltage input, low quiescent current, low-dropout (LDO) linear regulators that operate from 1.6 V to 3.6 V and provide up to 300 mA of output current. The low 55 mV dropout voltage at 300 mA load improves efficiency and allows operation over a wide input voltage range. The low 23 μA of quiescent current at no load makes the ADP170 / ADP171 / ADP172 ideal for battery-operated portable equipment.

TheADP170 is capable of 31 fixed-output voltage options, ranging from 0.8 V to 3.0 V. ADP171 is an adjustable version, which allows output voltages that range from 0.8 V to 3.0 V via an external divider. The ADP170 / ADP171 are optimized for stable operation with small 1 μF ceramic output capacitors. Ideal for powering digital processors, the ADP170 / ADP171 exhibit good transient performance and occupy minimal board space. Compared with commodity types of LDOs, the ADP170 / ADP171 provide 20 dB to 40 dB better power supply rejection ratio (PSRR) at 100 kHz, making the ADP170 / ADP171 an ideal power source for analog-to-digital converter (ADC) mixed-signal processor systems and allowing use of smaller size bypass capacitors. In addition, low output noise performance without the need for an additional bypass capacitor further reduces printed circuit board (PCB) component count.

Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP170 / ADP171 are available in tiny 5-lead TSOT for the smallest footprint solution to meet a variety of portable power applications.

APPLICATIONS

Mobile phones
Digital camera and audio devices
Portable and battery-powered equipment
DSP/FPGA/microprocessor supplies
Post dc-dc regulation

Part Models: 2
1ku List Price: Starting From $0.44

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
ADP171AUJZ-R7	5-Lead TSOT	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP171AUJZ-REEL	5-Lead TSOT	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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

Software Resources

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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.

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Evaluation Kits

ADP170 Evaluation Board

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Product Details

These evaluation boards are used to demonstrate the functionality of the ADP170 linear regulators.

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

ADP170/ADP171 Evaluation Board
2/4/2009

Reference Designs

Altera FPGA

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Features and Benefits

Intel Agilex 7 F-Series devices target a wide range of applications across many markets. This series offers transceiver rates up to 58 Gbps, advanced DSP blocks supporting multiple precisions of fixed-point and floating-point operations, and high-performance crypto blocks.
Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
Our reference designs are supported by an intuitive design tool set and IP.
ADI provides supporting documentation including LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly. Our team can provide samples and/or evaluation boards for quick validation that can speed time to market in the most complex applications.
For a complete list power designs and use cases, please contact your local FAE.