The R1121N281B-TR-F is a low-dropout (LDO) voltage regulator manufactured by Ricoh. It is designed to provide a stable 2.8V output voltage from a higher or fluctuating input voltage. The “TR” suffix indicates that the component is supplied in tape and reel packaging for automated assembly. The “F” suffix likely signifies a specific lot or manufacturing variation.

Applications

• Mobile Phones: Power management for various components.
• Digital Cameras: Provides stable voltage for image sensors and processors.
• Portable Gaming Devices: Regulates power for the CPU, GPU, and display.
• Wireless Modules: Ensures consistent power for RF transceivers.
• MP3 Players: Provides a stable voltage supply for the audio codec and amplifier.

Features

• Low Dropout Voltage: Operates with minimal voltage difference between input and output, maximizing efficiency.
• High Output Voltage Accuracy: Provides a stable and precise output voltage.
• Overcurrent Protection: Protects the device and the load from damage due to excessive current draw.
• Thermal Shutdown Protection: Prevents damage from overheating.
• Enable/Disable Control: Allows for power saving by disabling the regulator when not needed.
• Small Package Size: Allows for compact circuit designs.

Benefits

• Extended Battery Life: Efficient voltage regulation extends the operational time of battery-powered devices.
• Improved System Reliability: Stable voltage output ensures consistent performance and reduces the risk of component failure.
• Protection Against Damage: Overcurrent and thermal shutdown features safeguard the device and connected circuitry.
• Compact Design: Small package size enables integration into space-constrained applications.
• Reduced Power Consumption: Enable/disable control helps to minimize energy waste.

Additional Details

The R1121N281B-TR-F is typically designed to operate with ceramic capacitors, which contribute to its stability and low ESR. The official datasheet provides detailed specifications, including input voltage range, output voltage tolerance, maximum output current, and thermal resistance. Always consult the official Ricoh datasheet before using this component to ensure proper application and adherence to specifications. Designed for Surface Mount Technology (SMT).