The XC9111A351PR is a synchronous step-up DC/DC converter with integrated coil, manufactured by Torex Semiconductor Ltd. It is designed to efficiently boost a low input voltage to a stable output voltage of 3.5V. The integration of the coil simplifies circuit design and reduces the overall footprint, making it suitable for compact applications. The device utilizes PWM/PFM control to maintain high efficiency over a wide range of load currents.

Applications

• Portable Devices
• Wearable Electronics
• IoT Devices
• Battery-Powered Systems
• Energy Harvesting

Features

• Integrated Inductor: Reduces external component count and PCB area.
• Synchronous Rectification: Improves efficiency and reduces power dissipation.
• PWM/PFM Control: Optimizes efficiency across varying load conditions.
• Low Start-up Voltage: Allows operation from low-voltage sources, such as single-cell batteries.
• Fixed Output Voltage: Provides a stable 3.5V output.
• Overcurrent Protection (OCP): Protects the device and load from excessive current.
• Thermal Shutdown (TSD): Shuts down the device in case of overheating.
• Small Package: Enables compact design.

Benefits

• High Efficiency: Extends battery life in portable applications.
• Simplified Design: Reduces design complexity and time-to-market.
• Compact Footprint: Allows for smaller and more portable devices.
• Stable Output Voltage: Ensures reliable performance of connected devices.
• Robust Protection: Protects against damage from overcurrent and overheating.

Additional Details

The XC9111A351PR operates with an input voltage range of approximately 0.9V to 5.5V. The synchronous rectification reduces power dissipation compared to traditional diode-based converters. The PWM/PFM mode switching allows for optimal efficiency across varying load conditions. The integrated coil eliminates the need for external inductor selection and placement, simplifying the design process and reducing the overall solution size. It incorporates safety features such as overcurrent protection and thermal shutdown to ensure robust and reliable operation. The compact package is ideal for space-constrained applications, and the device is RoHS compliant.