ADM7171ACPZ-3.0-R7

Overview

The ADM7171ACPZ-3.0-R7 is a fixed-output low dropout linear regulator manufactured by Analog Devices Inc., providing a regulated 3.0 V output with a maximum load current of 1 A. It operates from an input voltage range of 2.3 V to 6.5 V and features ultralow noise performance, delivering 5 μV rms in the 100 Hz to 100 kHz bandwidth. The device achieves high power supply rejection ratio (PSRR) of 60 dB at 100 kHz and fast transient response characteristics. It incorporates precision enable control, adjustable soft start functionality, and comprehensive protection against overcurrent and thermal overload conditions.

Feature Summary

• Ultralow noise architecture delivers consistent 5 μV rms output noise independent of the specific fixed output voltage setting.
• High power supply rejection ratio maintains effective filtering across wide frequency ranges up to 1 MHz.
• Fast transient response capability ensures rapid stabilization following significant load step changes.
• Precision enable pin provides accurate logic threshold switching for reliable system power management.

Applications

• Regulation for noise-sensitive analog-to-digital converter circuits
• Powering precision operational amplifiers requiring clean supply rails
• Supply regulation for phase-locked loops and voltage-controlled oscillators
• Clock distribution integrated circuits requiring stable voltage levels

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm package marking matches the specified part number exactly. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Review the latest datasheet revision for any updates to electrical specifications or recommended operating conditions before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring high current delivery alongside stringent noise suppression requirements. The fixed 3.0 V output eliminates external feedback resistor networks, simplifying board layout compared to adjustable variants. Verify that the application input voltage remains within the specified 2.3 V to 6.5 V operational range under all expected line conditions.

Part Context

This device belongs to the ADM7171 family of CMOS low dropout regulators designed for high-performance mixed-signal applications. The series offers multiple current ratings and output configurations to support diverse power management needs. The specific model utilizes an 8-lead LFCSP package optimized for compact surface-mount assembly while maintaining efficient thermal dissipation capabilities.

Replacement Considerations

The ADM7170 serves as a lower current alternative within the same family offering 500 mA output capability. The ADM7172 provides increased current capacity at 2 A for higher power demands. Both alternatives share identical input voltage ranges and package footprints, facilitating potential design modifications without major layout changes.