onsemi NCP170AMX180TCG: The Ultimate 180mA Low-Noise LDO Voltage Regulator

In the realm of modern electronic design, 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 NCP170AMX180TCG stands out as a premier solution, engineered specifically to deliver exceptional power supply rejection and ultra-low noise performance.

This low-dropout (LDO) voltage regulator is designed to provide a fixed output of 1.8V with a maximum output current of 180mA. Its key advantage lies in its ability to operate with a very low dropout voltage, ensuring regulation even when the input voltage is very close to the output level, which is critical for battery-powered devices where maintaining efficiency as the battery discharges is essential.

A standout feature of the NCP170 is its ultra-low noise output of just 6.5µV RMS (typical) across a 10Hz to 100kHz bandwidth. This is achieved through innovative internal design and the integration of a dedicated noise bypass capacitor, making it ideal for powering sensitive analog and RF circuitry without degrading signal integrity. Furthermore, it boasts an impressive Power Supply Rejection Ratio (PSRR) of 75dB at 1kHz, effectively filtering out ripple and noise from the input supply.

Housed in a space-saving, low-profile XDFN-4 package, the regulator is perfect for compact PCB designs. It also incorporates crucial protection features like current limiting and thermal shutdown, safeguarding both the regulator and the downstream components under fault conditions. With a wide input voltage range from 2.2V to 5.5V, it offers designers great flexibility for use in both 3.3V and 5V systems.

ICGOOODFIND: The onsemi NCP170AMX180TCG is an exemplary LDO that combines ultra-low noise, high PSRR, and robust protection in a miniature package, making it a top-tier choice for designers who refuse to compromise on power quality.

Keywords: Low-Noise LDO, Power Supply Rejection Ratio (PSRR), Ultra-Low Dropout Voltage, Voltage Regulator, Noise-Sensitive Applications.