The LM1084ISX-3.3 is a low dropout (LDO) voltage regulator from National Semiconductor (now Texas Instruments). It's designed to provide a stable 3.3V output voltage with a low dropout voltage, meaning it can maintain regulation even when the input voltage is only slightly higher than the output voltage. This is particularly useful in battery-powered applications and other scenarios where the input voltage may fluctuate. The ISX suffix typically indicates a surface mount package (TO-263).

Applications:

• Post Regulation for Switching Supplies
• Battery Chargers
• Motherboard Power Supplies
• Microprocessor Power Supplies
• Instrumentation

Features:

• Low Dropout Voltage: Maintains regulation with minimal input-output voltage differential.
• Fixed Output Voltage: Provides a stable 3.3V output.
• Current Limiting: Protects the regulator from overload conditions.
• Thermal Shutdown: Prevents damage due to excessive heat.
• Reverse Battery Protection

Benefits:

• Stable Output Voltage: Ensures reliable operation of downstream circuits.
• Efficient Power Conversion: Low dropout voltage minimizes power loss.
• Overload Protection: Prevents damage to the regulator and connected components.
• Thermal Protection: Enhances reliability and prevents thermal runaway.

Specifications:

• Output Voltage: 3.3V (Fixed)
• Maximum Input Voltage: 30V
• Dropout Voltage (Typical): 1.3V at 5A
• Output Current: 5A
• Operating Temperature Range: -40°C to +125°C
• Package: TO-263