CAT4004AHU2-GT3

Overview

The CAT4004AHU2-GT3 is a four-channel programmable LED driver IC from onsemi, designed for portable applications. It features four matched low-dropout current sinks with an output current of 40 mA per channel. The device operates within a supply voltage range of 2.4 V to 5.5 V and supports both boost and buck topologies. It utilizes the EZDim interface for digital dimming control and includes adjustable output voltage capabilities. The component is housed in an 8-lead UDFN package and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Provides four independent constant-current channels for precise LED brightness matching
• Integrates EZDim logic input for direct microcontroller-controlled linear dimming
• Supports flexible power configurations through integrated boost and buck topology options
• Features low dropout voltage allowing direct operation from single-cell lithium-ion batteries

Applications

• Portable electronic device backlighting
• Camera flash illumination systems
• Mobile phone display enhancement
• Digital camera LED indicators

Procurement Notes

Verify that the specific suffix HU2 corresponds to the required tape and reel packaging configuration as defined by the manufacturer's ordering information. Confirm that the UDFN-8 package dimensions align with the target PCB footprint requirements. Ensure the selected variant meets the necessary thermal dissipation standards for the intended enclosure environment.

Selection Notes

Select this component when a design requires four independently controlled LED channels with high current matching accuracy. It is suitable for space-constrained portable devices where low dropout voltage enables efficient battery usage. Consider this part if the system architecture benefits from integrated digital dimming interfaces rather than analog control methods.

Part Context

This device belongs to the CAT4004A series of LED drivers, which are optimized for portable electronics. The series provides multiple channel counts to accommodate various lighting needs while maintaining a consistent interface standard. The CAT4004AHU2-GT3 specifically addresses applications requiring four-channel synchronization and compact surface-mount integration.

Replacement Considerations

The CAT4004B series serves as a functional alternative within the same product family. Verify pin compatibility and electrical parameter alignment before substitution.