The XC9111A181PRN is a synchronous step-up DC/DC converter manufactured by Torex Semiconductor Ltd. This converter is designed to provide a stable output voltage even when the input voltage fluctuates or is lower than the desired output. It integrates a coil and control IC in a single package, simplifying circuit design and reducing the overall footprint on the printed circuit board (PCB). The device incorporates a PWM/PFM control circuit, allowing for efficient operation over a wide range of load currents.

Applications

• Power supplies for mobile devices
• Battery-powered equipment
• Wearable technology
• IoT (Internet of Things) devices
• LED lighting applications

Features

• Integrated Coil: Simplifies design and reduces board space.
• Synchronous Rectification: Enhances efficiency by using a MOSFET instead of a diode for rectification.
• PWM/PFM Control: Automatically switches between PWM (Pulse Width Modulation) and PFM (Pulse Frequency Modulation) modes to optimize efficiency at both heavy and light loads.
• Low Start-up Voltage: Operates from a low input voltage, suitable for single-cell battery applications.
• Output Voltage Setting: Fixed output voltage of 1.8V.
• Overcurrent Protection: Protects the device and the load from excessive current draw.
• Thermal Shutdown Protection: Shuts down the device if the internal temperature exceeds a safe limit.
• Small Package: Available in a compact package for space-constrained applications.

Benefits

• High Efficiency: Minimizes power loss and extends battery life.
• Simplified Design: Reduces the number of external components required, speeding up development time.
• Small Footprint: Enables the design of compact and portable devices.
• Stable Output Voltage: Provides a consistent power supply, ensuring reliable operation of connected devices.
• Robust Protection: Protects against potential damage from overcurrent and overheating conditions.

Additional Details

The XC9111A181PRN operates with an input voltage range typically from 0.9V to 5.5V, boosting it to a fixed output voltage of 1.8V. The device's switching frequency is typically in the MHz range, contributing to its efficiency and compact size. It is available in a small, thermally enhanced package, contributing to efficient heat dissipation. The integrated synchronous rectification further improves efficiency compared to traditional diode-based boost converters. The device is RoHS compliant and halogen-free, meeting environmental standards.