**ADP7118ARDZ: A High-Precision, Low-Noise 20V LDO Linear Regulator**

In the realm of power management, achieving clean and stable voltage rails is paramount for the performance of sensitive analog and RF circuits. The **ADP7118ARDZ from Analog Devices** stands out as a premier solution, engineered to deliver exceptional accuracy and minimal noise in a robust package. This high-voltage, low-dropout (LDO) linear regulator is designed to set a new benchmark for precision power delivery.

**Uncompromising Precision and Performance**

The ADP7118ARDZ operates with an input voltage of up to **20V**, making it exceptionally versatile for a wide array of industrial, automotive, and communications applications. Its key strength lies in its **ultra-low output noise performance of 9 μV rms** (10 Hz to 100 kHz) and **high power supply rejection ratio (PSRR)** of 70 dB at 10 kHz. This ensures that even the most noise-sensitive components, such as high-resolution ADCs, DACs, and precision sensors, receive a pristine power supply, free from disruptive ripples.

**Advanced Architecture for Maximum Stability**

A standout feature of this LDO is its ability to **maintain high PSRR across a wide frequency range** while operating with a very small, ceramic output capacitor of just 1 μF. This simplifies board design, reduces the bill of materials, and enhances reliability. The device incorporates a **soft-start circuitry** to limit inrush current during startup, protecting both the regulator and the load. Furthermore, its wide operating temperature range (-40°C to +125°C) ensures robust performance in harsh environments.

**Designed for Ease and Reliability**

Housed in a compact 8-lead SOIC package, the ADP7118ARDZ offers a **low dropout voltage of 310 mV** at a 200 mA load, maximizing efficiency even when the input voltage is close to the output set point. It provides a fixed output voltage version with **excellent initial accuracy of ±0.8%**, guaranteeing a reliable and precise output throughout its lifetime. An integrated enable pin and protection features like current limit and thermal overload make it a safe and controllable choice for complex systems.

**ICGOODFIND**

The ADP7118ARDZ is an exemplary LDO regulator that masterfully combines high voltage operation, ultra-low noise, and outstanding PSRR. It is an indispensable component for designers who refuse to compromise on power quality for their most critical analog subsystems.

**Keywords:** Low-Dropout (LDO) Regulator, Ultra-Low Noise, High PSRR, Precision Voltage Regulation, 20V Input Voltage.