The MIC4833YMLTR is a high-efficiency, synchronous boost regulator from Micrel, now Microchip Technology, optimized for driving WLEDs (White LEDs). It provides a constant current output to ensure consistent brightness of the LEDs. The integrated synchronous rectifier enhances efficiency and reduces external component count, making it ideal for compact and portable applications. It provides protection features to protect both the regulator and the connected LED string.

Applications

• LED Backlighting: Driving WLEDs in LCD displays for mobile phones, tablets, and other portable devices.
• Camera Flash: Powering LEDs for camera flash functionality in smartphones and digital cameras.
• General Lighting: Driving small LED lights for portable lighting applications.
• Wearable Devices: Powering LEDs in smartwatches and fitness trackers.

Features

• High Efficiency: Synchronous rectification and optimized design provide high efficiency, extending battery life.
• Constant Current Output: Ensures consistent brightness of the LEDs.
• Integrated Synchronous Rectifier: Reduces external component count and improves efficiency.
• Adjustable Output Current: Allows for adjusting the brightness of the LEDs.
• Over-Voltage Protection (OVP): Protects the device and LEDs from over-voltage conditions.
• Short-Circuit Protection (SCP): Protects the device from damage due to short circuits.
• Thermal Shutdown: Protects the device from overheating.

Benefits

• Extended Battery Life: High efficiency minimizes power losses, resulting in longer battery life for portable devices.
• Consistent LED Brightness: Constant current output ensures consistent brightness of the LEDs.
• Simplified Design: Integrated features reduce design complexity and time-to-market.
• Reduced Component Count: Integrated synchronous rectifier minimizes the need for external components, saving space and cost.
• Robust Protection: Over-voltage protection, short-circuit protection, and thermal shutdown ensure reliable operation and protect the device from damage.

The MIC4833YMLTR is available in a small package, designed for portable applications. It is ideally suited for backlighting and other LED drive applications.