The EZ1117CM-3.3 is a low dropout (LDO) positive voltage regulator from Semtech, specifically designed to provide a stable 3.3V output. As an LDO regulator, it excels in applications where the input voltage is only slightly higher than the output voltage, maximizing efficiency and minimizing power loss.

Applications

• Post Regulation for Switching Power Supplies
• Battery Powered Systems
• Networking Equipment
• Microcontroller Power Supplies
• Linear Regulators

Features

• Fixed Output Voltage: 3.3V
• Low Dropout Voltage: Typically 1.1V at 800mA
• Output Current: 800mA
• Internal Current Limit
• Thermal Overload Protection
• Available in SOT-223 Package

Benefits

• Stable 3.3V Output for Sensitive Electronics
• High Efficiency Operation
• Protection against Overcurrent and Overheating
• Compact Size
• Simplified Circuit Design

Additional Details

The EZ1117CM-3.3 maintains a stable 3.3V output with an input voltage as low as 4.4V (typical dropout voltage of 1.1V at 800mA). This capability makes it an excellent choice for battery-powered applications or situations where the input voltage might fluctuate. The integrated current limit and thermal shutdown features provide protection against damage in case of overloads or excessive heat. The SOT-223 package is suitable for surface mount assembly and offers decent thermal characteristics. Proper capacitor selection is crucial for stability and optimal transient response. Consider input and output capacitor values and ESR (Equivalent Series Resistance) ratings. The device is designed for a wide range of operating temperatures; consult the datasheet for specific temperature ratings and derating curves. The regulator's low quiescent current contributes to overall system efficiency, especially in low-power applications.