The R1140Q251B-TR is a voltage regulator IC manufactured by Ricoh. It's designed to provide a stable and regulated output voltage of 2.5V, making it suitable for various electronic applications. The "-TR" suffix suggests that it's packaged in tape and reel for automated assembly.

Applications

• Microcontroller Power: Supplying a stable 2.5V voltage to microcontrollers and digital logic circuits.
• Sensor Power Supply: Providing regulated power to sensors and transducers requiring a precise voltage.
• Low-Power Devices: Power management for low-power IoT devices, wearables, and portable electronics.
• RF Modules: Regulating the voltage for RF transceivers and wireless communication modules.
• Memory Devices: Supplying power to memory ICs, such as EEPROMs and SRAMs, that require a 2.5V supply.

Features

• Fixed Output Voltage: Provides a stable 2.5V output voltage.
• Low Dropout Voltage: Ensures stable operation even when the input voltage is close to the output voltage.
• Low Quiescent Current: Minimizes power consumption in standby mode, extending battery life.
• Overcurrent Protection: Protects the regulator and connected circuits from damage due to excessive current.
• Short-Circuit Protection: Safeguards against short circuits, preventing damage to the regulator.
• Thermal Shutdown Protection: Protects the IC from overheating.
• Small Package: Available in a compact package for space-constrained applications.

Benefits

• Stable Power Supply: Provides a consistent and reliable voltage source for sensitive electronic components.
• Extended Battery Life: Low quiescent current minimizes power consumption and extends battery life in portable devices.
• Protection Against Fault Conditions: Overcurrent, short circuit, and thermal shutdown features protect the regulator and connected circuitry from damage.
• Simplified Circuit Design: Fixed output voltage simplifies circuit design and reduces the need for external components.
• Reduced Board Space: Small package size allows for integration into space-constrained applications.

Additional Details

The R1140Q251B-TR typically operates with an input voltage range from a few volts above the output voltage (2.5V) up to a maximum voltage specified in the datasheet. The output current capability and other detailed specifications, such as ripple rejection and transient response, are available in the official Ricoh datasheet. The package is usually a small surface-mount type like SOT-23 or DFN. The "-TR" suffix signifies tape and reel packaging for automated assembly. This device is generally RoHS compliant. Output voltage accuracy is typically within +/- 2%. The dropout voltage is typically around 200mV at the rated output current, depending on operating conditions.