ADP7142ARDZ

Overview

The ADP7142ARDZ is a CMOS low dropout linear regulator manufactured by Analog Devices. It operates from an input voltage range of 2.7 V to 40 V and provides up to 200 mA of output current. The device features a typical quiescent current of 50 μA at no load and a shutdown current as low as 1.8 μA. It delivers high power supply rejection, achieving 88 dB at 10 kHz, and maintains an ultralow output noise of 11 μV rms. The regulator offers excellent line and load transient response stability using only a small 2.2 μF ceramic output capacitor.

Feature Summary

• Provides ultralow output noise independent of fixed output voltage options
• Delivers high power supply rejection across various frequencies
• Features user-programmable soft start capability in LFCSP and SOIC packages
• Includes precision enable with programmable logic thresholds

Applications

• Regulation for noise-sensitive analog and mixed-signal circuits
• Powering ADC, DAC circuits, and precision amplifiers
• Supplying power for VCO VTUNE control
• Communications and infrastructure equipment
• Medical, healthcare, industrial, and automotive instrumentation

Procurement Notes

Verify the specific package type and suffix against official documentation before procurement. Confirm that the ordering suffix corresponds exactly to the required pin configuration and thermal characteristics. Ensure compatibility with the intended PCB layout regarding exposed pad connections and minimum capacitance requirements.

Selection Notes

Select this component for applications requiring high input voltages up to 40 V with low noise performance. Consider the available fixed output voltages or adjustable configurations via external feedback dividers. Evaluate thermal dissipation requirements based on the selected package and ambient operating conditions to ensure junction temperature limits are not exceeded.

Part Context

This part belongs to the ADP7142 series of low dropout regulators designed for high-performance analog applications. The series supports multiple package options including LFCSP, SOIC, and TSOT to accommodate different size and thermal constraints. It is suitable for portable equipment due to its low quiescent current consumption and efficient operation under varying load conditions.

Replacement Considerations

Consult official manufacturer documentation for confirmed substitute part numbers. Verify electrical specifications, pinout compatibility, and thermal performance when considering alternative components.