The R1172N401D-TR-F is a voltage regulator IC manufactured by Ricoh. It is a low-dropout (LDO) regulator designed to provide a stable output voltage of 4.0V with a high level of accuracy. It is typically used in applications where a regulated voltage supply is needed from a higher voltage source, particularly in battery-powered devices and systems requiring low noise and high efficiency.

Applications:

• Battery-powered devices
• Mobile phones and smartphones
• Wireless communication devices
• Portable audio players
• Power management systems

Features:

• Low dropout voltage
• High output voltage accuracy
• Low quiescent current
• Overcurrent protection
• Thermal shutdown protection
• Small package size
• Fixed output voltage: 4.0V

Benefits:

• Extends battery life in portable devices due to low quiescent current.
• Provides a stable and accurate output voltage, ensuring reliable operation of connected circuits.
• Protects the device and connected circuits from damage due to overcurrent or over-temperature conditions.
• Small package size allows for use in space-constrained applications.

Additional Details:

The R1172N401D-TR-F features a low dropout voltage, meaning it can maintain a regulated output voltage even when the input voltage is close to the output voltage. This is especially important in battery-powered devices as the battery voltage decreases during discharge. The device has built-in overcurrent and thermal shutdown protection to prevent damage from excessive current draw or overheating. The "-TR-F" suffix typically indicates tape and reel packaging for automated assembly. The typical quiescent current is very low, minimizing power consumption. The operating temperature range is usually from -40°C to +85°C. The package is SOT-23-5.