**High-Performance ADP7118ARDZ-R7 200 mA, Low Noise, LDO Linear Regulator for Precision Analog Applications**

In the realm of precision analog design, power integrity is paramount. Noise, ripple, and unstable voltage rails can severely degrade the performance of sensitive components like high-resolution ADCs, DACs, op-amps, and sensors. To address these critical challenges, the **ADP7118ARDZ-R7** emerges as a superior solution, setting a high standard for low-dropout (LDO) regulators in demanding applications.

The ADP7118 is a high-voltage, low-noise, low-quiescent-current LDO capable of delivering up to **200 mA of output current**. Its exceptional performance stems from a sophisticated architecture designed to minimize noise and provide a clean, stable supply voltage. A key feature is its **ultra-low output noise of just 9 μV rms** (integrated from 100 Hz to 100 kHz), which is crucial for preventing noise from coupling into and disrupting sensitive signal paths. This is achieved through an innovative design that includes a dedicated noise-reduction (NR) pin. By connecting a small external capacitor to this pin, the internal reference noise is drastically reduced, ensuring the purest possible output.

Furthermore, the ADP7118 excels in power supply rejection (PSR). It offers an outstanding **PSRR of 70 dB at 10 kHz**, effectively attenuating unwanted ripple and noise from the preceding switching regulator or power source. This high PSRR acts as a robust filter, cleaning up the noisy intermediate rail before it reaches the critical analog load. The device operates over a wide input voltage range from 3.0 V to 20 V, providing significant flexibility in various system architectures.

Thermal and protection features are integral to its reliability. The ADP7118 is available in adjustable and fixed output voltage options, with the **ADP7118ARDZ-R7** specifically offering a fixed 5.0V output. Housed in a compact 8-lead SOIC package, it incorporates built-in protections including current limiting and thermal shutdown, safeguarding both the regulator and the downstream circuitry under fault conditions. Its low dropout voltage of 310 mV at 200 mA ensures efficient operation even as the input voltage approaches the output level, preserving energy and reducing heat dissipation.

**ICGOODFIND:** The ADP7118ARDZ-R7 is an indispensable component for engineers designing high-accuracy systems. Its unparalleled combination of **ultra-low noise, high PSRR, and robust 200 mA output current** makes it the ideal power management solution for medical instrumentation, test and measurement equipment, industrial automation, and RF communication systems, where precision is non-negotiable.

**Keywords:** Low Noise LDO, High PSRR, Precision Analog, ADP7118, Voltage Regulator.