onsemi NCP170AMX150TCG: A 150mA Low-Noise LDO Voltage Regulator for Precision Applications

In the realm of modern electronics, where sensitive analog circuits and noise-intolerant components like high-resolution sensors, RF transceivers, and precision ADCs are ubiquitous, maintaining a clean and stable power supply is paramount. The onsemi NCP170AMX150TCG stands out as a critical component engineered specifically to meet this challenge. This 150mA low-noise LDO (Low-Dropout) voltage regulator delivers an exceptional combination of ultra-low noise and high power supply rejection ratio (PSRR), making it an ideal choice for powering the most demanding loads.

A key strength of the NCP170 lies in its ultra-low output noise performance of 9.5µV RMS (typical, 10Hz to 100kHz). This is achieved through innovative internal design and the integration of a high-quality bypass capacitor, which significantly reduces inherent noise generated by the reference voltage and error amplifier. This feature is indispensable for applications where even minute power supply fluctuations can degrade signal integrity and overall system performance.

Furthermore, this regulator boasts an impressive PSRR of 70dB at 1kHz, which effectively attenuates unwanted ripple and noise originating from the upstream switching power supply or other noisy sources on the board. This ensures that the regulated output remains pristine even when the input voltage is contaminated with noise, safeguarding sensitive circuitry.

Despite its compact XDFN4 package, the NCP170AMX150TCG offers a robust set of features. It operates with a very low dropout voltage, maximizing efficiency and extending battery life in portable devices. It also incorporates crucial protection features such as current limit and thermal shutdown, enhancing the reliability of the end product. With a fixed output voltage of 1.5V and a wide input voltage range up to 5.5V, it provides designers with a versatile and resilient power management solution.

ICGOOFind: The onsemi NCP170AMX150TCG is a superior low-noise LDO regulator that provides a critical clean power source for noise-sensitive applications. Its exceptional ultra-low noise and high PSRR performance ensure signal integrity, while its integrated protections and small form factor offer a reliable and space-efficient solution for advanced electronic designs.

Keywords: Low-Noise LDO, Power Supply Rejection Ratio (PSRR), Ultra-Low Noise, Voltage Regulator, Clean Power