The LM3490IM5-15 is a fixed 1.5V output, low-dropout (LDO) voltage regulator from Texas Instruments (formerly National Semiconductor). It is designed to provide a stable and regulated voltage supply for various electronic circuits and systems. This device offers excellent performance characteristics, including low dropout voltage, high accuracy, and overcurrent protection, making it suitable for a wide range of applications.

Applications:

• Post Regulation for Switching Power Supplies
• Point of Load Regulation in Distributed Power Systems
• Battery-Powered Systems
• Microcontroller Power Supply
• FPGA and DSP Power Supply

Features:

• Fixed 1.5V Output Voltage
• Low Dropout Voltage (Typically 150mV at 100mA)
• High Output Voltage Accuracy (±2%)
• Low Quiescent Current (Typically 55μA)
• Overcurrent Protection
• Short Circuit Protection
• Thermal Overload Protection
• Stable with Ceramic Output Capacitors

Benefits:

• Stable and Accurate Voltage Supply: Provides a consistent 1.5V output, ensuring reliable operation of connected devices.
• Extended Battery Life: Low quiescent current minimizes power consumption, extending battery life in portable applications.
• Protection Against Fault Conditions: Overcurrent, short circuit, and thermal overload protection enhance system reliability and prevent damage.
• Simplified Design: Requires minimal external components, simplifying circuit design and reducing board space.
• Improved System Performance: Low dropout voltage enables operation with minimal input voltage headroom, improving overall system efficiency.

Additional Details:

The LM3490IM5-15 is available in a small SOT-23-5 package. It has an input voltage range of 2.7V to 5.5V. The maximum output current is 100mA. It is stable with output capacitors as low as 1μF. The operating temperature range is -40°C to +125°C.