ON Semiconductor MC33761SNT1-028: Ultra-Low Noise, High PSRR Linear Voltage Regulator

The MC33761SNT1-028 from ON Semiconductor is a stellar example of a high-performance, ultra-low noise linear voltage regulator designed to deliver clean power to sensitive RF and analog circuitry. With its exceptional power supply rejection ratio (PSRR) and low noise output, this component is ideal for applications requiring a stable and pure voltage supply, such as wireless communication systems, medical equipment, and precision instrumentation.

Constructed with an advanced BiCMOS process, the MC33761SNT1-028 operates over a wide input voltage range and can provide a fixed output voltage with high accuracy. The device is capable of sourcing up to 150 mA of load current, making it suitable for a variety of low-power applications. Additionally, the low dropout voltage ensures efficient operation even when the input voltage is close to the output voltage, minimizing power loss and heat generation.

Key features of the MC33761SNT1-028 include:

• Ultra-Low Output Noise: This regulator produces a very low output noise level of typically 30 µVRMS, which is crucial for maintaining signal integrity in noise-sensitive circuits.
• High PSRR: The high power supply rejection ratio of 70 dB at 1 kHz reduces the impact of supply voltage fluctuations on the output voltage, providing a more stable and reliable power source.
• Low Dropout Voltage: The device's low dropout performance ensures efficient operation and a reduced need for a higher input voltage, which can be beneficial in battery-powered devices.
• Thermal Protection: Built-in thermal shutdown protects the device from damage due to overheating, enhancing its reliability and longevity.
• Wide Operating Temperature Range: The MC33761SNT1-028 is designed to operate over an industrial temperature range of -40°C to +85°C, accommodating a broad spectrum of environmental conditions.

The MC33761SNT1-028 comes in a compact, surface-mountable SOT-23-5 package, making it an excellent choice for space-constrained applications. Its small footprint, combined with outstanding performance characteristics, ensures that this voltage regulator can be seamlessly integrated into sophisticated electronic systems without compromising on power integrity.

Whether you're developing high-fidelity audio equipment, precision sensors, or any other application where power supply noise can be detrimental, the MC33761SNT1-028 from ON Semiconductor provides a reliable solution for maintaining a clean and stable voltage rail.