The LP2981AIM5-3.2 is a 100 mA, fixed-output voltage regulator manufactured by National Semiconductor (now Texas Instruments). It is part of the LP2981 family of micropower, low-dropout (LDO) regulators. These regulators are designed for use in battery-powered systems and other applications where low quiescent current and low dropout voltage are critical.

Applications:

• Cellular Phones
• Laptop Computers
• PDAs
• Battery-Powered Systems
• Portable Instrumentation

Features:

• Fixed Output Voltage: 3.2V output.
• Low Dropout Voltage: Typically 170mV at 100mA.
• Low Quiescent Current: Typically 38μA.
• High Accuracy Output Voltage: ±0.5% tolerance.
• Short Circuit Current Limiting
• Thermal Overload Protection
• ON/OFF Control
• SOT-23-5 Package: Small surface-mount package.

Benefits:

• Extended Battery Life: Low quiescent current minimizes power consumption.
• Stable Output Voltage: High accuracy ensures reliable operation of powered devices.
• Improved Efficiency: Low dropout voltage reduces power dissipation.
• Simplified Design: Fixed output voltage simplifies circuit design.
• Compact Solution: Small package size minimizes board space requirements.

Additional Details:

The LP2981AIM5-3.2 is designed to be stable with ceramic output capacitors, which are commonly used in modern electronic devices. The low dropout voltage allows the regulator to operate with a small difference between the input and output voltages, maximizing efficiency and extending battery life. The short-circuit current limiting and thermal overload protection features protect the regulator and the powered devices from damage. The ON/OFF control allows the regulator to be disabled, further reducing power consumption when the regulated voltage is not needed. The SOT-23-5 package is a small surface-mount package that is easy to integrate into PCB designs. Refer to the datasheet for detailed electrical characteristics, application notes, and package dimensions.