The XC9111B331MRN is a synchronous step-up DC/DC converter manufactured by Torex Semiconductor Ltd. This device is designed to efficiently boost a lower input voltage to a regulated 3.3V output voltage. A key feature of this converter is the integration of the coil, simplifying the circuit design and reducing the overall solution size. The XC9111B331MRN incorporates a PWM/PFM control scheme to optimize efficiency across a wide range of load currents.

Applications

• Power Supplies for Portable Devices
• Battery-Powered Systems
• Wearable Electronics
• IoT (Internet of Things) Devices
• LED Lighting

Features

• Integrated Inductor: Simplifies the design and reduces the number of external components required.
• Synchronous Rectification: Improves efficiency and reduces power dissipation.
• PWM/PFM Control: Automatically switches between PWM (Pulse Width Modulation) and PFM (Pulse Frequency Modulation) to optimize efficiency at both light and heavy loads.
• Low Start-up Voltage: Allows operation from a low input voltage, ideal for single-cell battery applications.
• Fixed Output Voltage: Provides a stable 3.3V output.
• Overcurrent Protection (OCP): Protects the device from damage due to excessive output current.
• Thermal Shutdown (TSD): Shuts down the device if the internal temperature exceeds a safe operating limit.
• Small Package Size: Enables compact and space-saving designs.

Benefits

• High Efficiency: Extends battery life in portable applications.
• Simplified Design: Reduces design complexity and component count.
• Small Footprint: Allows for compact product designs.
• Stable Output Voltage: Ensures reliable performance of connected devices.
• Robust Protection: Protects against damage from overcurrent and overheating conditions.

Additional Details

The XC9111B331MRN operates with an input voltage range that typically starts from 0.9V. The device uses synchronous rectification to reduce power loss and improve efficiency. The integrated coil simplifies the design process and minimizes the required board space. It incorporates safety features such as overcurrent protection and thermal shutdown to ensure robust and reliable operation. The 'N' suffix usually signifies particular packaging or configuration options. This device is RoHS compliant, signifying adherence to environmental standards.