ADM7171ACPZ-R7

Overview

The ADM7171ACPZ-R7 is a CMOS low dropout linear regulator (LDO) manufactured by Analog Devices Inc. It operates from an input voltage range of 2.3 V to 6.5 V and provides up to 1 A of load current. The device features ultralow noise output, high power supply rejection ratio (PSRR), and fast transient response. It is available in adjustable or fixed output configurations, with the adjustable version allowing voltages from 1.2 V to VIN minus dropout voltage. The component utilizes an advanced proprietary architecture to achieve excellent line and load transient response using only a small 4.7 μF ceramic output capacitor.

Feature Summary

• Ultralow noise performance independent of output voltage
• High power supply rejection ratio across wide frequency ranges
• Fast transient response for rapid load step changes
• Precision enable control with programmable soft start

Applications

• Regulation for ADC and DAC circuits
• Powering precision amplifiers
• Supplying PLLs, VCOs, and clocking ICs
• Communications and infrastructure systems
• Medical and healthcare equipment

Procurement Notes

Verify the specific ordering suffix matches the required output voltage configuration, as the base part number covers both adjustable and fixed variants. Confirm package type and thermal requirements align with your PCB layout. Check RoHS compliance status and moisture sensitivity level before integration. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this LDO when designing high-performance analog or mixed-signal circuits requiring stable regulation from 6 V down to 1.2 V rails. Consider the adjustable version if custom voltage levels are needed beyond standard fixed options. Evaluate thermal dissipation based on the difference between input and output voltages at maximum load current. Verify that the application can accommodate the minimum required input and output capacitance specifications.

Part Context

This component belongs to the ADM7171 family of CMOS LDOs designed for applications demanding high current capability and low noise. It complements other regulators like the ADM7170 and ADM7172, which offer different current ratings within the same voltage operating range. The device is optimized for portable equipment due to its low quiescent current consumption and compact packaging solution.

Replacement Considerations

Direct substitutes include the ADM7170 for 500 mA applications and the ADM7172 for 2 A requirements within the same voltage range. Verify pin compatibility and thermal characteristics when transitioning between these family members.