The SA1117BH-ADJTR is an adjustable low dropout (LDO) positive voltage regulator manufactured by Silan. It is designed to provide a stable and regulated output voltage, adjustable by external resistors, from a higher input voltage. The LDO regulator is suitable for various applications where a customized and 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
• Adjustable voltage bias
• Noise-sensitive circuits

Features

• Low dropout voltage
• Adjustable output voltage via external resistors
• Overcurrent protection
• Thermal shutdown protection
• High output voltage accuracy
• Stable with low ESR ceramic capacitors

Benefits

• Provides a stable and regulated output voltage, customizable to specific application needs, 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 requiring minimal external components and offering flexibility in voltage selection.
• 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-ADJTR requires external resistors connected to the feedback pin to set the desired output voltage. Input and output capacitors are also typically required for stability and improved 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. 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, reference voltage, 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. The output voltage can be adjusted using the formula provided in the datasheet, which typically involves two external resistors.