CAT4004BHU2-GT3

Overview

The CAT4004BHU2-GT3 is a four-channel programmable LED driver IC from onsemi. It features four matched low-dropout current sinks with an output current of 25 mA and adjustable output voltage. The device operates within a supply voltage range of 2.4 V to 5.5 V and supports both Boost and Buck topologies. It includes EZDim logic inputs for digital dimming, offering 32 linear levels. The unit weight is 7 mg, and it functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides four matched low-dropout current sinks for precise LED brightness control without external setting resistors.
• Integrates EZDim logic input interface enabling digital control with 32 linear dimming levels.
• Supports flexible power configurations through integrated Boost and Buck topology capabilities.
• Features thermal shutdown protection and ultra-low quiescent current for enhanced system reliability.

Applications

• Liquid crystal display backlighting systems
• Portable electronic devices powered by lithium-ion batteries
• Digital camera flash illumination circuits

Procurement Notes

Verify the specific package suffix HU2 corresponds to the required 8-pad UDFN 2mm x 2mm form factor during procurement. Confirm RoHS compliance status via official datasheets before integration. Ensure EN/DIM pin logic levels match the host controller interface specifications. Validate operating temperature ranges against final assembly environmental conditions.

Selection Notes

Select this component when designing compact LED drivers requiring four independent channels with tight current matching. It is suitable for applications needing direct battery operation due to its low dropout voltage characteristics. Consider the UDFN package constraints for PCB layout if space is limited. Evaluate the 32-level dimming resolution against application visibility requirements.

Part Context

This part belongs to the CAT4004B series, designed as a high-efficiency solution for driving LEDs in portable electronics. It complements other variants like the CAT4003B, which offers three channels. The series emphasizes simplicity by eliminating external current-setting resistors while maintaining high precision across multiple channels.

Replacement Considerations

CAT4003BHU2-GT3: Offers identical functionality but with three channels instead of four. Verify channel count requirements before substitution.