ADP7118WAUJZ-2.5-R7

Overview

The ADP7118WAUJZ-2.5-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc. It operates within an input voltage range of 2.7 V to 20 V and delivers up to 200 mA of output current. The device provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.8%. It features ultralow noise performance of 11 µV rms and high power supply rejection ratios, reaching 88 dB at 10 kHz. The regulator includes precision enable functionality, programmable soft start in specific packages, and protection against overcurrent and thermal overload. It is qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• Delivers ultralow output noise of 11 µV rms independent of the fixed output voltage setting.
• Provides high power supply rejection ratio (PSRR) of 88 dB at 10 kHz for effective noise filtering.
• Features user-programmable soft start capability via an external capacitor in LFCSP and SOIC packages.
• Includes precision enable logic with adjustable thresholds and hysteresis for controlled startup sequencing.

Applications

• Regulation for noise-sensitive analog and mixed-signal circuits
• Powering ADC and DAC circuits as well as precision amplifiers
• Supplying power for VCO VTUNE control in communications systems
• Medical and healthcare equipment requiring stable low-noise rails

Procurement Notes

Verify the component authenticity through official Analog Devices channels or authorized distributors. Confirm that the package type matches the required PCB footprint and that the AEC-Q100 qualification meets automotive reliability standards if applicable. Ensure proper handling procedures are followed due to ESD sensitivity. Check datasheet revisions for any updates to pin configurations or electrical specifications before finalizing procurement orders.

Selection Notes

Select this regulator when designing circuits requiring low noise and high PSRR from higher voltage buses down to 2.5 V rails. Consider the 2 mm × 2 mm LFCSP package for compact designs needing excellent thermal performance. Verify that the application load current remains within the 200 mA limit and that input voltage stays above 2.7 V. Evaluate the need for external soft-start capacitors based on inrush current constraints in the target system.

Part Context

This component belongs to the ADP7118 family of low dropout regulators designed for high-performance analog applications. The series offers various fixed output voltages ranging from 1.2 V to 5.0 V, along with adjustable options. The WAUJZ suffix indicates a specific automotive-grade variant packaged in TSOT-23-5 format, distinguishing it from standard industrial versions available in LFCSP or SOIC packages.

Replacement Considerations

Direct replacements include other ADP7118 variants with different fixed output voltages such as ADP7118WAUJZ-3.3-R7 or ADP7118WAUJZ-5.0-R7. Cross-package equivalents like the LFCSP version ADP7118AWCPZN-2.5-R7 offer identical electrical characteristics but require PCB layout adjustments. Ensure any substitute maintains the same AEC-Q100 qualification level for automotive use.