The R5487L314KP-TR is a low-dropout (LDO) voltage regulator manufactured by Nisshinbo Micro Devices Inc. This regulator is designed to maintain a stable output voltage, even when the input voltage approaches the desired output voltage. This characteristic is particularly beneficial in battery-powered applications where the battery voltage gradually declines.

Applications

• Power Management in Portable Devices: Supplies a stable voltage to sensitive components such as microcontrollers, sensors, and RF transceivers in smartphones, tablets, and wearable electronics.
• Post-Regulation for Switching Power Supplies: Reduces the ripple and noise inherent in switching power supplies, providing a cleaner voltage source for analog circuitry.
• Battery-Powered Systems: Ensures consistent performance in battery-operated devices as the battery discharges, maintaining stable operating conditions.
• Wireless Communication Equipment: Used in Bluetooth modules, Wi-Fi modules, and other wireless communication devices to provide a regulated power supply.
• Industrial Control Systems: Offers stable power to sensors, control circuits, and other electronic components in industrial environments.

Features

• Low Dropout Voltage: Operates with minimal voltage difference between input and output, maximizing efficiency and extending battery life.
• High Output Voltage Accuracy: Delivers a precise and stable output voltage for reliable device operation.
• Low Quiescent Current: Minimizes power consumption, especially in standby or low-power modes.
• Overcurrent Protection: Protects the regulator and connected devices from damage due to excessive current flow.
• Thermal Shutdown Protection: Prevents overheating and potential damage by shutting down the regulator when temperature limits are exceeded.

Benefits

• Extended Battery Life: Low dropout voltage and low quiescent current maximize battery runtime in portable applications.
• Improved System Reliability: Stable and accurate output voltage ensures reliable operation of connected electronic components.
• Protection Against Overload Conditions: Overcurrent and thermal shutdown safeguards protect the regulator and the load from damage.
• Reduced Noise and Ripple: Provides a clean and stable power supply for sensitive analog circuits, improving performance.
• Simplified Circuit Design: Integrated protection features reduce the need for external components, simplifying circuit design.

Additional Details

The R5487L314KP-TR provides an output voltage of 3.1V (as indicated by '31' in the part number). It is typically available in a small surface-mount package like SOT-23 or similar. The input voltage range typically spans from 1.7V to 5.5V. The low dropout voltage allows it to function effectively even when the input voltage is only slightly higher than the output voltage. It frequently includes built-in short-circuit protection. The recommended output capacitance is specified in the datasheet and is critical for stability. Its operating temperature range typically covers -40°C to +85°C.