CAT4201TD-GT3

Overview

The CAT4201TD-GT3 is a high-efficiency step-down LED driver IC manufactured by onsemi. It operates from input voltages ranging from 6.5V to 28V and supports output currents up to 350mA. The device utilizes a single external resistor (RSET) for current setting and features analog dimming via a CTRL input. It is housed in a TSOT-23-5 package with an operating temperature range of -40°C to +125°C.

Feature Summary

• High efficiency step-down topology optimized for driving high brightness LEDs
• Single resistor sets full-scale LED string current
• Analog dimming and idle mode control through dedicated input

Applications

• Driving high brightness LEDs from power supplies up to 28V
• General LED lighting applications requiring efficient buck conversion
• Automotive LED illumination systems

Procurement Notes

Verify component authenticity and datasheet revisions prior to integration. Confirm that the specified voltage and current parameters align with target LED load requirements. Check for end-of-life status or obsolescence notices from the manufacturer before finalizing design-in decisions.

Selection Notes

Select this component when a buck converter topology is required for LED strings powered by voltages significantly higher than the forward voltage drop. Ensure the thermal management solution accommodates the TSOT-23-5 package constraints. Verify that the analog dimming interface matches the system control architecture.

Part Context

This part belongs to the CAT4201 series of LED drivers, designed specifically for high-efficiency current regulation. It represents a solution for applications where power supply voltage exceeds typical LED forward voltages, eliminating the need for linear regulators and improving overall system efficiency.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.