**ADP7182ACPZ-R7: A Comprehensive Technical Overview of Analog Devices' High-Performance Negative Voltage LDO**

In the realm of power management, the need for clean, stable, and precise negative voltage rails is paramount for powering sensitive components like op-amps, sensors, and data converters. The **ADP7182ACPZ-R7** from Analog Devices stands out as a premier solution, a high-performance, low-dropout (LDO) linear regulator engineered specifically for demanding negative voltage applications. This article provides a detailed technical examination of its architecture, key features, and ideal use cases.

At its core, the ADP7182 is a **negative-voltage LDO regulator** capable of converting an input voltage range of -2.5 V to -5.5 V into a precisely regulated output from -1.5 V to -5.0 V. Its standout electrical characteristic is an ultralow noise performance of **1.8 μV RMS** (10 Hz to 100 kHz) and an exceptional power supply rejection ratio (PSRR) of **80 dB at 10 kHz**. This combination ensures that even the most noise-sensitive analog circuits are shielded from power supply disturbances, which is critical for maintaining signal integrity and maximizing dynamic range in high-resolution systems.

The device is designed for high efficiency and low power dissipation. It can deliver a **maximum output current of 200 mA** with a very low dropout voltage of only 135 mV at full load. This high efficiency translates to less wasted energy and reduced thermal management challenges, allowing for more compact and reliable designs. Furthermore, the ADP7182 incorporates advanced protection features, including **current limit and thermal shutdown** circuits, safeguarding both the regulator and the downstream load under fault conditions.

Housed in a compact, low-profile **8-lead LFCSP (3mm x 3mm) package**, the ADP7182ACPZ-R7 is ideal for space-constrained applications. Its stability is maintained with a small, low-ESR 2.2 μF ceramic output capacitor, simplifying the bill of materials and reducing overall solution size. The device's wide operating temperature range of -40°C to +125°C makes it suitable for industrial, automotive, and communications infrastructure applications where reliability under harsh conditions is required.

Typical applications are found in a wide array of sophisticated electronics. It is perfectly suited to provide a clean negative supply for **RF amplifiers, mixers, and LNAs** in communication systems, for **high-speed data converters (ADCs/DACs)** in test and measurement equipment, and for precision operational amplifiers in medical instrumentation and automotive sensor interfaces.

**ICGOOODFIND**

The ADP7182ACPZ-R7 is a superior choice for designers seeking a high-performance, low-noise negative voltage LDO. Its unparalleled noise and PSRR specifications, combined with robust output current capability and a compact form factor, make it an indispensable component for enhancing the performance and reliability of precision analog systems.

**Keywords:**

**Negative Voltage LDO**

**Ultralow Noise**

**High PSRR**

**200mA Output Current**

**LFCSP Package**