The UTC LD1117L-3.3V-A is a low dropout (LDO) voltage regulator providing a fixed 3.3V output. It is designed for applications requiring a stable and efficient 3.3V supply with low dropout voltage. The 'SOT-89' designation indicates the surface-mount package style. UTC (Unisonic Technologies Co., Ltd.) is a manufacturer of power management and analog integrated circuits.

Applications:

• Microcontroller power supplies
• Logic power supplies
• Post regulators for switching power supplies
• Battery-powered devices
• Portable equipment
• Noise-sensitive circuits

Features:

• Fixed 3.3V output voltage: Provides a precise and stable 3.3V output.
• Low dropout voltage: Operates with a small difference between input and output voltage, extending battery life.
• Output current of 100mA: Suitable for low to medium current applications.
• Internal thermal overload protection: Prevents damage due to excessive heat.
• Short circuit protection: Protects the regulator and connected circuitry from short circuits.
• SOT-89 package: Compact surface-mount package.

Benefits:

• Stable 3.3V output: Ensures proper operation of connected devices.
• Efficient power conversion: Low dropout voltage improves efficiency and extends battery life.
• Overload protection: Protects the regulator and connected circuitry from damage.
• Compact size: SOT-89 package allows for use in space-constrained applications.
• Easy to use: Requires minimal external components.

Additional Details:

The LD1117L-3.3V-A in the SOT-89 package is a three-terminal device with input, output, and ground pins. The low dropout voltage allows the regulator to maintain a stable 3.3V output even when the input voltage is only slightly higher than 3.3V. A bypass capacitor is recommended on both the input and output to improve stability and transient response. The thermal resistance of the SOT-89 package should be considered when determining the maximum power dissipation. The operating temperature range is typically from 0°C to +125°C. Refer to the datasheet for pin assignments and detailed specifications.