ADP125

RECOMMENDED FOR NEW DESIGNS

5.5 V Input, 500 mA, Low Quiescent Current, CMOS Linear Regulators

Data Sheet (Rev. D) Product Selection Table
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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
  • Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V
  • Very low dropout voltage: 130 mV
  • Low quiescent current: 45 μA
  • Low shutdown current: <1 μA
  • Excellent PSRR performance: 60 dB at 100 kHz
  • Excellent load/line transient response
  • See data sheet 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 (θJA). 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
ADP125
5.5 V Input, 500 mA, Low Quiescent Current, CMOS Linear Regulators
ADP125 Functional Block Diagram ADP125 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Application Note 2

Technical Articles 1

Frequently Asked Question 1

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Software Resources

Device Drivers 1

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
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • ADP125

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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LTspice

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

EVAL-ADP125

ADP125 Evaluation Board

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Product Details

These evaluation boards are used to demonstrate the functionality of the ADP125 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.
EVAL-ADP125
ADP125 Evaluation Board

Reference Designs

Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix US+ Rail Consolidation - Minimum Rails (AU20P/25P) Power Tree
Artix UltraScale+ Circuits from the lab

Minimum Rails for AU10/15P and AU20/25P - Non-Hardware Verified Design

View Detailed Reference Design

Features and Benefits

  • Xilinx Artix® UltraScale+™ devices are the industry’s only cost-optimized FPGAs based on an advanced, production-proven 16nm architecture for best-in-class performance/watt.

  • Analog Devices, Inc. supports power delivery solutions for the Artix Ultrascale+ low-cost designs. Monolithic solutions are used to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and footprint.

  • ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

  • For a complete list power designs and use cases, please contact your local FAE.

  • Key Power for full management devices are used as follows:

    • LTC3307A
    • LTC3309A
    • ADP125
    • LTC3617 (Optional DDR)
    • LTC3618
    • ADM1186 (Optional Monitoring & Sequencing)
Versal HBM Diagram
Versal HBM Diagram
Versal HBM Non-Hardware Verified Design Circuits from the lab

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Features and Benefits

  • The Versal™ HBM series features heterogeneous integration of fast memory, secure connectivity, and adaptive compute to eliminate processing and memory bottlenecks for memory-bound, compute-intensive workloads such as machine learning, database acceleration, next-generation firewalls, and advanced network testers. Analog Devices has worked closely AMD to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • ADI provides supporting documentation including LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly. For a complete list  power designs and use cases, please contact your local local FAE.
  • ADI has also completed a complete power evaluation report for Mid-High Voltage rails. For a complete report please submit your interest here.

Key power regulators are used for this device as follows:

  • LTC3888-1
  • LTC7051
  • LTC3633A
  • LTC7200S
  • LTC7151S
  • LT8652
  • ADP125
  • LTC3617 (Optional)
  • LTC3618 (Optional)
Artix 7 – Single Stage Power Solution
Artix 7 – Single Stage Power Solution
Xilinx Artix 7 Non-Hardware Verified Design Circuits from the lab

View Detailed Reference Design

Features and Benefits

  • Xilinx Artix 7™ Artix™-7 devices provide high performance-per-watt fabric, transceiver line rates, DSP processing, and AMS integration in a cost-optimized FPGA. This family is the best value for a variety of cost and power-sensitive applications including software-defined radio, machine vision cameras, and low-end wireless backhaul.
  • 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.

Key power regulators are used for this device as follows:

  • MAX77542
  • MAX38912
  • ADP125
Xilinx Spartan 7
Xilinx Spartan 7
Xilinx Spartan 7: Non-Hardware Verified Design Circuits from the lab

View Detailed Reference Design

Features and Benefits

  • Spartan™ 7 devices offers exceptional performance per watt, along with small form factor packaging to meet the most stringent requirements.  These devices are ideally suited for industrial, consumer, and automotive applications including any-to-any connectivity, sensor fusion, and embedded vision.
  • Analog Devices has worked closely Xilinx to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • ADI provides supporting documentation including LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly. For a complete list  power designs and use cases, please contact your local FAE.

Key power regulators are used for this device as follows:

  • MAX77542
  • ADP125
Artix UltraScale+
Minimum Rails for AU10/15P and AU20/25P - Non-Hardware Verified Design
Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix US+ Rail Consolidation - Minimum Rails (AU20P/25P) Power Tree
Versal HBM Non-Hardware Verified Design
Versal HBM Diagram
Xilinx Artix 7 Non-Hardware Verified Design
Artix 7 – Single Stage Power Solution
Xilinx Spartan 7: Non-Hardware Verified Design
Xilinx Spartan 7

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