The XC6209B422DR is a low dropout (LDO) voltage regulator manufactured by Torex Semiconductor Ltd. This regulator provides a stable and regulated 4.2V output voltage, making it suitable for various applications, especially those involving lithium-ion batteries and portable devices. The key features include low quiescent current, high accuracy, and integrated protection circuits.

Applications

• Lithium-ion Battery Charging Circuits: Providing a regulated 4.2V charge voltage for single-cell Li-ion batteries.
• Portable Devices: Power management for smartphones, tablets, and other portable electronics.
• Wireless Communication Modules: Regulating voltage for RF transceivers and other wireless components.
• Wearable Electronics: Powering microcontrollers, sensors, and displays in smartwatches and fitness trackers.
• Power Banks: Providing stable output voltage for charging portable devices.

Features

• Low Dropout Voltage: Ensures stable output voltage even when the input voltage is close to the output voltage.
• High Output Voltage Accuracy: Provides a precise 4.2V output voltage, typically with ±2% accuracy.
• Low Quiescent Current: Minimizes power consumption during standby mode, extending battery life.
• Overcurrent Protection: Limits the output current to protect the regulator and connected circuitry.
• Short Circuit Protection: Shuts down the output in the event of a short circuit condition.
• Thermal Shutdown Protection: Protects the device from damage due to overheating.
• Small Package Size: Available in compact packages such as SOT-25 or DFN.
• Ceramic Capacitor Compatible: Operates stably with ceramic output capacitors.

Benefits

• Safe Lithium-ion Battery Charging: Provides a regulated 4.2V for safe and efficient charging of Li-ion batteries.
• Extended Battery Life: Low quiescent current and high efficiency contribute to longer operating times for battery-powered devices.
• Stable and Reliable Performance: Accurate output voltage ensures consistent performance of connected components.
• Robust Protection: Overcurrent, short circuit, and thermal shutdown protection enhance system reliability.
• Compact Design: Small package size allows for integration into space-constrained applications.

Additional Details

The XC6209B422DR is designed to operate within an input voltage range of 2.0V to 6.0V and provides a fixed output voltage of 4.2V. The device’s internal circuitry includes a precision reference voltage source, error amplifier, and output transistor. The internal protection features ensure safe and reliable operation in various applications. It is designed to work with ceramic output capacitors, which helps to reduce the overall solution size and improve transient response.