The LD1117AG-5.0 is a low dropout (LDO) voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). It is designed to provide a stable 5.0V 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 makes it suitable for battery-powered applications and other situations where input voltage may vary.

Applications

• Battery-Powered Devices: Used to regulate voltage in battery-powered devices such as portable electronics, IoT devices, and wireless sensors.
• Microcontroller Power Supplies: Provides a stable 5V supply for microcontrollers and other digital circuits.
• Post-Regulation for Switching Power Supplies: Used to reduce ripple and noise in switching power supplies.
• Linear Regulation: Can be used as a general-purpose 5V linear regulator.
• Power Management Systems: Integrated into power management systems for efficient voltage regulation.

Features

• Low Dropout Voltage: Operates with a low dropout voltage, allowing for efficient regulation even with low input voltages.
• Fixed 5.0V Output: Provides a stable and precise 5.0V output voltage.
• Overcurrent Protection: Includes overcurrent protection to prevent damage from short circuits or excessive load.
• Thermal Overload Protection: Features thermal overload protection to prevent overheating and damage.
• Reverse Polarity Protection: Offers reverse polarity protection to prevent damage from incorrect power supply connections.

Benefits

• Stable Voltage Regulation: Provides a stable and reliable 5.0V output voltage, ensuring proper operation of connected devices.
• Efficient Power Conversion: Low dropout voltage maximizes efficiency and minimizes power dissipation.
• Enhanced System Reliability: Overcurrent and thermal overload protection prevent damage from faults.
• Simplified System Design: Fixed output voltage simplifies design and reduces component count.
• Improved Device Lifespan: Reverse polarity protection prevents damage from incorrect power supply connections.

Additional Details

The LD1117AG-5.0 typically comes in a SOT-223 or TO-252 package. The dropout voltage is usually around 1.2V at the maximum rated current, which is generally 800mA to 1A. It requires an input capacitor and an output capacitor for stable operation, typically ceramic capacitors in the range of 1uF to 10uF. UTC is a reputable manufacturer of linear regulators.