TLD55421QUXUMA1

Overview

The TLD55421QUXUMA1 is a single-inductor high-power Buck-Boost controller from Infineon’s LITIX family, designed for automotive LED lighting. It supports a wide input voltage range of 4.5 V to 40 V and drives LEDs with forward voltages up to 55 V at an output current of 90 mA. Operating within a frequency range of 200 kHz to 700 kHz, the device ensures efficient power conversion across varying load conditions. Qualified under AEC-Q100 standards, it functions reliably between -40°C and +150°C in a compact VQFN-48-31 package.

Feature Summary

• Single-inductor Buck-Boost topology enabling wide LED forward voltage support
• Integrated fast output discharge operation for enhanced safety
• Supports both analog and PWM dimming control methods

Applications

• Automotive front lighting systems
• LED headlight modules requiring wide voltage tolerance
• High-power LED driver implementations

Procurement Notes

Verify the complete ordering part number against official Infineon documentation to ensure correct suffix alignment. Confirm that the specific variant matches the required automotive qualification status and packaging type before finalizing procurement orders.

Selection Notes

Select this component when a single inductor solution is preferred for space-constrained designs. It is suitable for applications requiring wide input voltage ranges and high efficiency across dynamic loads without complex multi-stage topologies.

Part Context

This IC belongs to the LITIX Basic+ family, which provides linear and switching solutions for automotive LED applications. The series emphasizes flexible fault management and accurate current regulation for rear and front lighting functions.

Replacement Considerations

Consult official Infineon substitution guides for verified equivalents. Ensure any replacement maintains compatible pinout, thermal characteristics, and electrical specifications for direct integration.