MAX8867EUK40 - Low-Noise, Low-Dropout, 150mA Linear Regulator

The MAX8867EUK40, designed by Maxim Integrated, is a high-performance, low-dropout linear regulator that offers optimal performance for noise-sensitive applications. This regulator is capable of delivering a continuous output current of up to 150mA, making it an excellent choice for portable electronics, such as PDAs, mobile phones, and wireless devices.

Key Features

• Output Voltage: Fixed 4.0V output with high accuracy.
• Low Dropout Voltage: Ensures efficient operation even at low input voltages, with a typical dropout of just 165mV at full load.
• Low Noise: Exhibits a low 30µVRMS output noise, making it suitable for RF and other noise-sensitive circuits.
• High PSRR: Excellent power supply rejection ratio (PSRR) of 70dB at 1kHz, which minimizes output noise and ripple.
• Thermal Protection: Features thermal shutdown and current limit protection to safeguard the device and connected components from excessive temperatures and current overloads.
• Small Footprint: Comes in a compact SOT23 package, ideal for space-constrained applications.

Applications

The MAX8867EUK40 is versatile and can be used in a wide range of applications. It is particularly well-suited for:

• Battery-Powered Devices
• Cellular Phones
• Handheld Instruments
• Portable Information Appliances
• Notebook Computers
• Wireless and DSL Modems

Technical Specifications

The device operates over a wide range of input voltages, from 2.5V to 6.5V, making it compatible with most battery technologies and power supplies. The MAX8867EUK40's low quiescent current of only 110µA (typical) extends battery life in portable applications. Furthermore, the regulator's fast transient response ensures stable operation during sudden changes in load, which is critical for maintaining performance in digital systems.

For those looking to integrate the MAX8867EUK40 into their designs, Maxim Integrated provides comprehensive technical documentation, including datasheets, application notes, and design support, to facilitate a smooth design-in process.