**ADM7171ACPZ-5-R7: A Comprehensive Guide to the 5V, 2A Ultra-Low Noise LDO Regulator**

In the world of power management, where clean and stable voltage is paramount for the performance of sensitive analog and RF circuits, the **ADM7171ACPZ-5-R7** stands out as a premier solution. This high-performance, 5V, 2A low-dropout (LDO) regulator from Analog Devices is engineered to deliver exceptional power quality in the most demanding applications, from telecommunications infrastructure to high-speed data converters and medical imaging systems.

**Unmatched Performance and Key Features**

The core of the ADM7171's appeal lies in its **ultra-low noise and high power supply rejection ratio (PSRR)** performance. It generates an impressively low output noise of just **4.5μV rms** (from 10 Hz to 100 kHz), ensuring that it does not introduce signal-degrading interference into the load. Coupled with a high PSRR of up to 80 dB at 10 kHz, it effectively attenuates ripples and noise coming from the input power source, providing a pristine, clean output voltage.

Capable of delivering up to **2A of continuous output current** with a typical dropout voltage of only 210 mV, this LDO is both powerful and efficient. Its **fast transient response** allows it to quickly react to sudden changes in load current, minimizing output deviation and maintaining stability. The device operates over a wide input voltage range from 2.3 V to 6.5 V, making it versatile for various system architectures.

**Designed for Stability and Ease of Use**

A critical advantage of the ADM7171 is its stability with tiny, space-saving ceramic capacitors. It only requires a small 4.7μF ceramic output capacitor for stable operation, which is a significant benefit for modern, miniaturized PCB designs. The part is offered in a compact, 8-lead LFCSP package (3mm x 3mm), ideal for space-constrained applications.

The "CPZ" suffix denotes the chip-scale package, and the "-5-R7" specifies a fixed 5.0V output voltage in tape-and-reel packaging. The device also includes crucial protection features such as **current limit and thermal overload protection**, safeguarding both the regulator and the load under fault conditions.

**Typical Applications**

The combination of high current, ultra-low noise, and high PSRR makes the ADM7171ACPZ-5-R7 an ideal choice for:

* Powering **low-noise amplifiers (LNAs) and RF transceivers**.

* Providing clean power to **high-resolution ADCs and DACs**.

* Serving as a point-of-load (POL) regulator in **FPGA and ASIC-based systems**.

* Critical power rails in **test and measurement equipment** and **medical devices**.

**Conclusion**

The ADM7171ACPZ-5-R7 is more than just a voltage regulator; it is a high-fidelity power component that guarantees the integrity of sensitive electronic signals. Its robust performance in noise suppression, current delivery, and transient response makes it an indispensable part of any design where power quality cannot be compromised.

**ICGOODFIND:** The ADM7171ACPZ-5-R7 is a top-tier 5V/2A LDO regulator renowned for its **ultra-low noise output and exceptional PSRR**, making it the perfect power solution for noise-sensitive RF, analog, and digital load applications.

**Keywords:**

* Ultra-Low Noise LDO Regulator

* High PSRR

* 2A Output Current

* 5V Fixed Output

* Ceramic Capacitor Stable