FAN1581MX

The FAN1581MX from Fairchild Semiconductor is an ultra-low dropout linear regulator designed for high-current applications up to 5A. It features a low typical dropout voltage of 0.4V at 5A, making it suitable for power-sensitive designs. The regulator supports remote sense operation for improved accuracy and offers fast transient response.

This device is available in adjustable versions capable of regulating output voltages from 1.3V to 5.7V, as well as fixed versions for 1.2V, 1.5V, and 2.5V outputs. These fixed versions are optimized for specific applications like GTL+ bus termination and logic IC power supplies.

The FAN1581MX includes on-chip thermal limiting for protection against excessive junction temperatures and current limiting for controlled short-circuit current. It is offered in multiple package options, including TO-263, TO-252, and TO-220, providing flexibility for different board layouts and thermal management requirements.

Key electrical specifications include a typical load regulation of 0.05% and a typical initial accuracy of 0.5%. The input voltage range is from 1.75V to 6.5V. These characteristics make the FAN1581MX a robust choice for embedded processor supplies, low voltage logic supplies, and DDR termination.