**ADP7142ARDZ-3-R7: A High-Performance 3V LDO Voltage Regulator for Precision Applications**

In the realm of modern electronics, the demand for clean, stable, and noise-free power is paramount, especially for sensitive analog and digital circuits. The **ADP7142ARDZ-3-R7**, a **3V, 200mA low-dropout (LDO) linear voltage regulator** from Analog Devices, stands out as a premier solution engineered specifically for such precision applications. This component is designed to provide exceptional power quality, making it an indispensable part of systems where even the slightest power fluctuation can degrade performance.

A key strength of the ADP7142ARDZ-3-R7 lies in its **ultra-low noise and high power supply rejection ratio (PSRR)**. It features an impressively low output noise of just **9μV√Hz** and maintains a PSRR greater than 70 dB at 10 kHz. This exceptional performance ensures that noise from the input power source is effectively blocked, delivering a pristine DC output. This is critical for powering noise-sensitive components like high-resolution sensors, precision analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF transceivers, where noise can directly impact measurement accuracy and signal integrity.

Beyond its noise performance, this LDO regulator is built for **high accuracy and stability**. The fixed 3.0V output voltage is accurate within ±1.8% over line, load, and temperature variations. Its design allows it to remain stable with small, space-saving ceramic output capacitors as low as 1 μF, simplifying board layout and reducing the overall bill of materials. The device also incorporates vital protection features, including **current limiting and thermal shutdown**, which safeguard both the regulator and the downstream circuitry under fault conditions.

Housed in a compact 8-lead SOIC package, the ADP7142ARDZ-3-R7 offers a blend of high performance and design flexibility. Its low dropout voltage of 185 mV at 200 mA load ensures efficient operation even when the input voltage is only marginally higher than the output, which is advantageous for battery-powered applications.

**ICGOOFind Summary:** The ADP7142ARDZ-3-R7 is a high-performance LDO regulator that sets a benchmark for precision power management. Its unparalleled combination of **ultra-low noise, high PSRR, and excellent line/load regulation** makes it the ideal choice for applications demanding the highest power quality, from medical instrumentation and test equipment to advanced communication systems.

**Keywords:** LDO Voltage Regulator, Ultra-Low Noise, High PSRR, Precision Applications, ADP7142