The R1161N261D-TR is a low-dropout (LDO) voltage regulator manufactured by Ricoh. This regulator is designed to provide a stable output voltage even when the input voltage is close to the desired output, making it suitable for applications where battery voltage may decrease over time or where there are voltage fluctuations in the system.

Applications:

• Power management in portable electronics: Used in smartphones, tablets, and other battery-powered devices.
• Voltage regulation for microcontrollers: Providing a stable supply voltage for MCUs.
• Post-regulation for DC-DC converters: Improving output voltage accuracy and reducing ripple.
• Power supplies for sensors: Providing a clean and stable voltage source for accurate sensor readings.

Features:

• Low Dropout Voltage: Maintains regulation with a small difference between input and output.
• High Output Voltage Accuracy: Provides a stable and precise output voltage.
• Overcurrent Protection: Protects the regulator and the load from excessive current.
• Thermal Shutdown: Prevents damage from overheating.
• Small Package Size: Allows for compact designs.

Benefits:

• Extended Battery Life: Due to its low dropout voltage and high efficiency, it can help extend battery life in portable devices.
• Improved System Reliability: Overcurrent and thermal shutdown features improve system reliability.
• Stable Performance: Provides a stable and precise output voltage, which can improve the performance of the circuits it powers.
• Reduced Board Space: The small package size allows for a more compact design.

The '261' in the part number typically refers to a 2.6V output voltage. The 'D' often indicates specific performance characteristics or package type. As with all electronic components, it's essential to consult the official Ricoh datasheet for the R1161N261D-TR to obtain definitive specifications. Key parameters to verify include the input voltage range, output current capability, dropout voltage at various load currents, quiescent current, and thermal characteristics. The datasheet will also specify recommended external components, such as input and output capacitors, to ensure stability and optimal performance. The -TR suffix indicates tape and reel packaging for automated assembly. The regulator also likely includes features such as short-circuit protection and soft-start to minimize inrush current during startup.