The NJM2872AF28 is a low dropout regulator (LDO) manufactured by New Japan Radio (NJR). It is designed to provide a stable 2.8V output voltage, even when the input voltage is close to the output voltage. This makes it suitable for battery-powered applications and other situations where a regulated voltage is required from a potentially fluctuating input.

Applications

• Portable Electronics: Powers components in devices like smartphones, tablets, and MP3 players.
• Wireless Communication Devices: Regulates voltage for Bluetooth modules, Wi-Fi chips, and other RF components.
• Microcontroller Power Supplies: Provides a stable 2.8V supply for various microcontrollers.
• Memory Devices: Powers memory chips like flash memory and SRAM.
• Sensor Systems: Regulates voltage for sensors and related analog circuitry.

Features

• Low Dropout Voltage: Maintains regulation with a minimal input-output voltage difference, improving efficiency.
• Fixed 2.8V Output: Provides a precise and stable 2.8V output voltage.
• Overcurrent Protection: Protects the regulator and the load from excessive current.
• Thermal Shutdown: Shuts down the regulator when the temperature exceeds a safe limit.
• Small Package: Available in a compact surface-mount package for space-constrained applications.

Benefits

• Extended Battery Life: Low dropout operation maximizes energy efficiency, extending the operating time of battery-powered devices.
• Stable and Reliable Power: Ensures consistent and accurate voltage supply for critical components.
• Protection from Fault Conditions: Overcurrent and thermal shutdown features prevent damage to the regulator and the connected circuits.
• Compact Design: Allows for integration into small and portable devices.

Additional Details

The NJM2872AF28 features a low quiescent current, which further contributes to its energy efficiency. It operates within a specified input voltage range, typically slightly above 2.8V. The overcurrent protection is set to a limit that prevents damage without being overly sensitive. The thermal shutdown temperature is typically around 150°C. This regulator is often used in applications requiring a precise and stable 2.8V supply in a small form factor, especially in battery-powered devices where efficiency is paramount.