The SA1117BH-3.3TR is a low dropout (LDO) positive voltage regulator manufactured by Silan. It is designed to provide a stable and regulated 3.3V output voltage from a higher input voltage. The LDO regulator is suitable for various applications where a regulated voltage supply is needed with minimal voltage difference between the input and output.

Applications

• Power management in portable devices
• Post-regulation for switching power supplies
• Battery-powered systems
• Microcontroller power supply
• Logic power supply
• Noise-sensitive circuits

Features

• Low dropout voltage
• Fixed 3.3V output voltage
• Overcurrent protection
• Thermal shutdown protection
• High output voltage accuracy
• Stable with low ESR ceramic capacitors

Benefits

• Provides a stable and regulated 3.3V supply, ensuring consistent performance of connected devices.
• Protects downstream components from overcurrent and thermal damage, enhancing system reliability.
• Extends battery life in portable devices due to its low dropout voltage and efficient operation.
• Simplifies power supply design by providing a fixed voltage output and requiring minimal external components.
• Reduces noise and ripple in the power supply, improving the performance of sensitive analog and digital circuits.
• Offers protection against short circuit conditions.

Additional Details

The SA1117BH-3.3TR requires only a few external components for operation, typically input and output capacitors to improve stability and transient response. The low dropout voltage ensures that the regulator can maintain a stable output voltage even when the input voltage is close to the output voltage. This is particularly important in battery-powered applications where the battery voltage decreases over time. The 'TR' suffix often indicates the package type, which is commonly a SOT-223 or similar surface-mount package. For detailed specifications such as input voltage range, output current capability, dropout voltage at specific current levels, and thermal resistance, refer to the manufacturer's datasheet. The device includes built-in protection features like overcurrent limiting and thermal shutdown to prevent damage in fault conditions.