The R1141Q281B is a low dropout (LDO) voltage regulator manufactured by Ricoh. It is designed to provide a stable and accurate output voltage even when the input voltage is close to the desired output voltage. This makes it particularly suitable for battery-powered and portable applications where the input voltage may fluctuate.

Applications

• Battery-Powered Devices: Smartphones, tablets, and other portable electronics require stable voltage regulation.
• Wearable Technology: Smartwatches, fitness trackers, and other wearable devices rely on efficient power management.
• Wireless Communication Devices: Bluetooth modules, Wi-Fi modules, and other wireless components need a stable power supply.
• Microcontroller Power Supplies: Provides a clean and regulated voltage for microcontrollers and other digital circuits.

Features

• Low Dropout Voltage: Maintains a stable output voltage with a minimal difference between the input and output voltage.
• High Output Voltage Accuracy: Provides a precise and reliable voltage supply for sensitive components.
• Low Quiescent Current: Minimizes power consumption when the regulator is not actively supplying current.
• Overcurrent Protection: Protects the regulator and the connected load from excessive current.
• Thermal Shutdown Protection: Prevents the regulator from overheating and potential damage.
• Small Package: Enables compact and space-saving designs.

Benefits

• Extended Battery Life: Low quiescent current and low dropout voltage contribute to longer battery life in portable devices.
• Stable Performance: High output voltage accuracy ensures consistent performance of connected devices.
• Increased System Reliability: Overcurrent and thermal shutdown protection enhance the reliability and longevity of the regulator and the overall system.
• Reduced Board Space: Small package size enables more compact and efficient designs.
• Simplified Circuit Design: Integrated features reduce the need for external components, simplifying the overall circuit design.

Additional Details

The R1141Q281B has a fixed output voltage of 2.8V. It is available in a small SOT-23-5 package. The operating temperature range is typically between -40°C and +85°C. The regulator provides excellent line and load regulation, ensuring a stable output voltage even under varying input voltage and load conditions. The device is generally RoHS compliant.