The BU21TD3WG-TR is a low-dropout (LDO) linear regulator from Rohm Semiconductor providing a stable 2.1V output voltage with a maximum output current of 300mA. This regulator is designed for space-constrained and battery-powered applications requiring efficient and reliable voltage regulation.

Applications

• Powering microcontrollers in low-power devices.
• Voltage regulation for sensors.
• Battery-powered IoT devices.
• Wearable electronics.
• Mobile phones and tablets.

Features

• Fixed output voltage: 2.1V
• Output current: Up to 300mA
• Low dropout voltage: 0.12V at 300mA
• Input voltage range: 2.4V to 5.5V
• Low quiescent current: 35μA (typical)
• Built-in overcurrent protection
• Built-in thermal shutdown protection
• Small WLCSP package (0.765mm x 1.165mm)
• RoHS compliant
• Tape and Reel packaging (-TR suffix)

Benefits

• Stable output voltage: Provides a reliable and consistent power supply.
• Low dropout voltage: Allows for efficient operation even with low input voltages.
• Low quiescent current: Minimizes power consumption in standby mode.
• Overcurrent and thermal protection: Protects the regulator and connected components from damage.
• Small size: Enables compact designs for portable devices.
• Tape and Reel Packaging: Suitable for automated assembly processes.

Additional Details

The BU21TD3WG-TR offers a low dropout voltage of 0.12V at 300mA, enabling it to operate efficiently with input voltages close to the 2.1V output. The integrated overcurrent and thermal shutdown protection features enhance the device's robustness and reliability. The tiny WLCSP package makes it ideal for applications where board space is at a premium. The -TR suffix indicates that the regulator is supplied in tape and reel packaging, facilitating automated assembly. External ceramic capacitors are recommended for input and output stabilization; consult the datasheet for specific values. The input voltage range is 2.4V to 5.5V. Refer to the Rohm Semiconductor datasheet for detailed specifications and application guidelines.