The MIC39501-2.5WUTR is a low-dropout (LDO) voltage regulator manufactured by Micrel (now Microchip Technology). This regulator provides a stable and regulated 2.5V output voltage from a higher input voltage, even with a small difference between input and output. The "WU" probably refers to the package type, most likely a surface-mount package like a TO-263 or similar. The "TR" suffix indicates that the device is supplied on tape and reel for automated assembly.

Applications

• Post regulation for switching power supplies
• Battery-powered devices
• Core voltage regulation for microprocessors and DSPs
• Set-top boxes
• Networking equipment

Features

• Low dropout voltage
• 2.5V fixed output voltage
• High output current (up to 5A)
• Stable with ceramic output capacitors
• Overcurrent and overtemperature protection
• Enable/shutdown control
• Reverse battery protection

Benefits

• Provides a clean and stable 2.5V supply for sensitive circuits
• Enables longer battery life in portable applications
• Protects the regulator and load from fault conditions
• Simplifies power supply design and reduces component count
• Improves system reliability

The MIC39501-2.5WUTR is designed for applications requiring a high-current, low-voltage regulated supply. The low dropout voltage characteristic allows the regulator to maintain regulation even when the input voltage is close to the output voltage, maximizing efficiency and extending battery life. Stability with ceramic output capacitors is a crucial feature, enabling the use of smaller and lower-cost capacitors. Protection features such as overcurrent and overtemperature protection safeguard the regulator and the connected load from damage due to excessive current or temperature. The enable/shutdown pin allows for power saving when the regulated voltage is not needed.

The 2.5V output is ideal for powering many low-voltage digital ICs, including microprocessors, DSPs, and memory devices. The high current capability (5A) makes it suitable for demanding applications. Micrel's LDO regulators are known for their robustness and performance, making the MIC39501-2.5WUTR a reliable choice for a wide range of power supply applications.