The R1121N251B-TR is a voltage regulator IC produced by Ricoh. It is designed to provide a stable 2.5V output voltage from a varying input voltage. The 'TR' suffix indicates that the component is supplied in tape and reel packaging, which is suitable for automated assembly processes.

Applications

• Wireless Communication Devices: Regulates power for RF transceivers and baseband processors.
• Memory Modules: Provides stable voltage to memory chips for reliable data storage and retrieval.
• Real-Time Clocks (RTC): Ensures accurate timekeeping by providing a stable power source.
• Power Supplies for Sensors: Delivers consistent voltage for accurate sensor readings.
• Low-Power Microcontrollers: Enables efficient operation of microcontrollers in battery-powered devices.

Features

• Low Supply Current: Minimizes power consumption, especially in standby mode.
• High Output Voltage Accuracy: Provides a precise and stable output voltage.
• Built-in Short-Circuit Protection: Protects the device and connected components from damage due to short circuits.
• Thermal Shutdown Circuit: Prevents overheating and ensures safe operation.
• Enable/Disable Function: Allows for power saving by disabling the regulator when not in use.
• Small Package: Enables compact designs and space savings.

Benefits

• Extended Battery Life: Low supply current prolongs the operating time of battery-powered devices.
• Improved System Stability: Accurate voltage regulation ensures consistent performance.
• Protection Against Damage: Built-in protection features safeguard the device and connected circuitry.
• Reduced Board Space: Small package size enables compact circuit designs.
• Increased Energy Efficiency: Enable/disable function allows for power saving when the regulator is not needed.

Additional Details

The R1121N251B-TR is designed to operate with ceramic capacitors, which contribute to its stability and performance. The official datasheet provides detailed specifications such as input voltage range, output voltage tolerance, maximum output current, and thermal resistance. It's essential to consult the datasheet for these parameters before integrating the component into a circuit. The IC uses Surface Mount Technology (SMT).