**ADM7170ACPZ-0-R7: A High-Performance, 0V Ultralow Noise LDO Regulator for Precision Applications**

In the realm of precision electronics, where clean and stable power is non-negotiable, the **ADM7170ACPZ-0-R7** stands out as a premier solution. This high-performance, low-dropout (LDO) linear regulator from Analog Devices is engineered to meet the stringent requirements of noise-sensitive applications, delivering exceptional power quality from a small footprint.

The defining characteristic of the ADM7170 is its **ultralow output noise performance of 0.58 µVrms** (typical from 10 Hz to 100 kHz). This remarkably clean output is crucial for powering delicate analog circuitry, such as high-resolution ADCs (Analog-to-Digital Converters), DACs (Digital-to-Analog Converters), precision sensors, and RF transceivers, where even minute power supply fluctuations can degrade signal integrity and overall system accuracy.

Complementing its low noise is an outstanding **power supply rejection ratio (PSRR) of 80 dB at 10 kHz**. This high PSRR ensures that the regulator effectively filters out ripples and noise originating from the upstream switching power supply or other sources, preventing them from propagating to the sensitive load. This feature is particularly valuable in mixed-signal systems where digital noise can easily couple into analog power domains.

A key advantage of the "-0-R7" variant is its **0V output capability**. Unlike many LDOs that have a minimum output voltage of 0.8V or higher, this model can regulate down to 0V. This is enabled by an external bias voltage (VBIAS), which allows the internal control circuitry to operate efficiently even when the output is at ground potential. This feature is indispensable for applications requiring dynamic power control or a true shutdown state.

Despite its high performance, the ADM7170 is highly efficient and requires a very low dropout voltage—only 145 mV at a 2A load. Housed in a compact, thermally enhanced 3 mm × 3 mm LFCSP package, it is capable of delivering a **robust maximum output current of 2A**, making it suitable for powering high-current, noise-sensitive points of load (POL). Integrated protection features, including current limiting and thermal shutdown, ensure reliable operation under fault conditions.

**ICGOOFind Summary**: The ADM7170ACPZ-0-R7 is an exceptional ultralow-noise LDO regulator that combines **0V output capability, superior PSRR, and impressive 2A output current** in a miniature package. It is the ideal power management solution for maximizing performance in the most demanding precision analog and RF applications.

**Keywords**: Ultralow Noise LDO, High PSRR, 0V Output Regulator, Precision Analog Power, 2A LDO Regulator.