The LD1117AL-50-AA3-A-R is a low dropout (LDO) linear voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). It's specifically designed to provide a stable and regulated 5.0V output voltage, even when the input voltage is only slightly higher than the desired output. This makes it ideal for applications where efficiency and low voltage operation are crucial. The regulator includes built-in protection features to ensure reliable performance.

Applications

• Battery-Powered Devices
• Post Regulation for Switching Power Supplies
• Microprocessor and Microcontroller Power Supplies
• Linear Regulation in Consumer Electronics
• Voltage Regulation in Industrial Control Systems

Features

• Low Dropout Voltage: Maintains a stable output even with a minimal input-output voltage differential.
• Fixed 5.0V Output: Delivers a precise and reliable 5V supply.
• Overcurrent Protection: Protects the regulator from damage due to excessive output current.
• Thermal Overload Protection: Prevents the regulator from overheating under high load conditions.
• Short Circuit Protection: Safeguards the regulator and load from damage during short circuits.
• SOT-223 Package: Compact surface-mount package for efficient board space utilization.

Benefits

• Stable and Accurate Voltage Regulation: Ensures consistent performance of connected devices by providing a stable 5V supply.
• Enhanced System Reliability: Built-in protection features protect against damage from overcurrent, overheating, and short circuits.
• Simplified Design: Requires minimal external components, simplifying circuit design and reducing board space.
• Increased Efficiency: Low dropout voltage improves efficiency, particularly in battery-powered applications.
• Wide Operating Temperature Range: Suitable for use in a variety of environmental conditions.

Technical Specifications

The LD1117AL-50-AA3-A-R operates from an input voltage range typically between 4.75V and 15V. It provides a fixed 5.0V output with a low dropout voltage, typically around 1.1V at full load. The maximum output current is generally in the range of 800mA to 1A, depending on operating conditions. The device is packaged in a SOT-223 package and usually operates in a temperature range from -40°C to +125°C.