onsemi NCP170AXV210T2G: A 200 mA Low-Noise LDO for Precision Power Applications

In the realm of modern electronics, achieving clean and stable power is paramount, especially for noise-sensitive applications such as RF transceivers, medical instrumentation, and high-fidelity audio systems. The onsemi NCP170AXV210T2G stands out as a superior solution, engineered specifically to meet the stringent demands for low noise and high power supply rejection.

This voltage regulator is a 200 mA low-dropout (LDO) linear regulator that provides a fixed 2.1 V output from an input voltage range of 2.5 V to 5.5 V. Its key differentiator is its exceptionally low output noise performance, typically just 10 µV RMS (integrated from 10 Hz to 100 kHz). This remarkable characteristic ensures that sensitive components receive a pristine voltage supply, free from the disturbances that can degrade signal integrity and overall system performance.

Furthermore, the NCP170 boasts an outstanding Power Supply Rejection Ratio (PSRR) of 70 dB at 1 kHz, effectively blocking any unwanted AC ripples or noise originating from the input power source. This high PSRR is maintained over a wide frequency range, making it an ideal choice for applications where the input rail may be provided by a noisy switching regulator (SMPS), enabling more efficient system-level power architectures.

The device incorporates advanced features that enhance both its performance and reliability. It requires only a small 1.0 µF ceramic capacitor on the output for stability, minimizing the solution's footprint and bill-of-materials cost. Additional built-in protections include current limiting and thermal shutdown, safeguarding the regulator and the load it powers under fault conditions. With its ultra-small XDFN4 package, the NCP170 is perfectly suited for space-constrained portable and battery-powered devices.

ICGOOODFIND: The onsemi NCP170AXV210T2G is an exceptional low-noise LDO regulator that delivers pristine 2.1V power, making it an indispensable component for designers prioritizing signal clarity and stability in advanced electronic systems.

Keywords: Low-Noise LDO, Power Supply Rejection Ratio (PSRR), 200 mA Regulator, Voltage Regulator, Precision Power Management.