The SA1117H-ADJTR is an adjustable low dropout (LDO) linear regulator manufactured by Silan. It is designed to provide a stable and adjustable output voltage from a higher input voltage. The device is commonly used in a wide range of electronic applications requiring a regulated voltage supply with low noise and high efficiency.

Applications

• Post regulation for switching power supplies
• Battery-powered systems
• Microcontroller power supply
• FPGA and DSP core voltage regulation
• Adjustable power supplies

Features

• Low dropout voltage: Typically 1.2V at 1A output current
• Output voltage adjustable from 1.25V to 13.8V
• Maximum output current: 1A
• Internal current limiting and thermal shutdown protection
• Available in SOT-223 package
• Low quiescent current

Benefits

• Adjustable output voltage: Provides flexibility in setting the desired output voltage for various applications.
• High efficiency: Low dropout voltage minimizes power dissipation, improving overall system efficiency.
• Overload protection: Internal current limiting and thermal shutdown protect the device from damage due to overload conditions.
• Compact size: The SOT-223 package offers a compact footprint for space-constrained applications.
• Ease of use: Adjustable output voltage is set using external resistors.

Additional Details

The SA1117H-ADJTR operates over a wide input voltage range. The dropout voltage is specified at a junction temperature of 25°C. The quiescent current is typically a few milliamperes. The device is stable with ceramic output capacitors. The SOT-223 package provides good thermal performance. The regulator is designed for use in a variety of consumer, industrial, and automotive applications. The output voltage is set by two external resistors according to the formula Vout = 1.25 * (1 + R2/R1). The operating temperature range is typically -40°C to +125°C.