The R1111N291B-TR is a voltage regulator manufactured by Ricoh. It is a low-dropout (LDO) regulator designed to provide a stable output voltage even when the input voltage is close to the output voltage. This regulator is particularly well-suited for battery-powered devices and other applications where power efficiency is critical.

Applications

• Smartphones and mobile devices: Used for power management and voltage regulation of various components.
• Wearable devices: Provides stable power to sensitive electronic components in smartwatches and fitness trackers.
• IoT (Internet of Things) devices: Ensures reliable operation in low-power IoT applications.
• Wireless communication devices: Regulates voltage for RF transceivers and other wireless modules.
• Portable power supplies: Used to regulate the output voltage of portable power banks and battery chargers.

Features

• Low Dropout Voltage: Ensures stable output even with a small input-output voltage difference.
• High Accuracy: Provides precise output voltage regulation.
• Low Quiescent Current: Minimizes power consumption in standby mode, extending battery life.
• Overcurrent Protection: Protects the regulator and the connected load from damage due to excessive current.
• Thermal Shutdown Protection: Shuts down the regulator in case of overheating, preventing damage.
• Small Package: Available in compact packages for space-constrained applications.

Benefits

• Extended Battery Life: Low quiescent current consumption helps to extend battery life in portable devices.
• Reliable Performance: Overcurrent and thermal shutdown protection ensure reliable operation and prevent damage.
• Stable Voltage Supply: High accuracy and low dropout voltage provide a stable and consistent voltage supply.
• Compact Design: Small package size allows for integration in space-constrained applications.
• Simplified Design: Integrated protection features simplify circuit design and reduce the number of external components required.

Additional Details

The R1111N291B-TR typically operates with a wide input voltage range and provides a fixed output voltage of 2.9V. It is designed for use in a variety of electronic devices requiring a stable and efficient power supply. The device is commonly available in a SOT-23-5 package. It is RoHS compliant. The operating temperature range is typically -40°C to +85°C. The output voltage accuracy is typically ±2.0%. The device is suitable for applications requiring a low noise power supply.