The R5487L302KP-TR is a low-dropout (LDO) voltage regulator manufactured by Ricoh. It's designed to provide a stable and regulated output voltage from a varying input voltage, even when the input voltage is close to the desired output voltage. This makes it suitable for battery-powered applications and other situations where the input voltage may fluctuate.

Applications

• Power Management in Portable Electronics: Used in smartphones, tablets, wearable devices, and other portable equipment to supply stable voltage to various components.
• Post-Regulation in Switching Power Supplies: Filters out noise and ripple from switching regulators to provide clean power to sensitive analog circuits.
• Battery-Powered Systems: Provides a regulated voltage source for battery-powered devices, ensuring consistent performance as the battery discharges.
• Microcontroller Power Supply: Regulates the voltage supplied to microcontrollers, ensuring stable operation and preventing data corruption.
• Wireless Communication Devices: Powers components in Bluetooth modules, Wi-Fi modules, and other wireless communication devices.

Features

• Low Dropout Voltage: Maintains a stable output voltage even when the input voltage is only slightly higher than the output voltage.
• High Output Voltage Accuracy: Provides a precise and stable output voltage for reliable operation.
• Low Quiescent Current: Minimizes power consumption when the regulator is not actively supplying current.
• Overcurrent Protection: Protects the regulator and the load from damage due to excessive current flow.
• Thermal Shutdown Protection: Prevents the regulator from overheating and being damaged.

Benefits

• Extended Battery Life: Low dropout voltage and low quiescent current help to extend battery life in portable devices.
• Improved System Reliability: Stable output voltage ensures consistent and reliable operation of connected devices.
• Protection Against Overload Conditions: Overcurrent and thermal shutdown protection prevent damage to the regulator and the load.
• Reduced Noise and Ripple: Provides a clean power supply for sensitive analog circuits.
• Simplified Circuit Design: Integrated protection features reduce the need for external components.

Additional Details

The R5487L302KP-TR features an output voltage of 3.0V (hence the '30' in the part number). It's typically packaged in a small SOT-23 or similar surface-mount package. The input voltage range generally spans from 1.7V to 5.5V. The low dropout voltage allows it to operate efficiently even as the battery voltage decreases. It often includes a built-in soft-start function to minimize inrush current during startup. The operating temperature range is usually between -40°C and +85°C.