onsemi

CAT4002ATD-GT3

CAT4002ATD-GT3 Description

The CAT4002ATD-GT3 from onsemi is a linear LED driver designed for backlight applications, offering precise current regulation for multi-step LED control. This surface-mount device is housed in a compact TSOT23-6 package and is supplied in Tape & Reel (TR) for automated assembly. With a 2.4V to 5.5V supply range, it supports dual outputs (20mA per channel) and integrates internal switches, simplifying design while minimizing external components. Though marked Obsolete, it remains ROHS3 Compliant and REACH Unaffected, ensuring environmental compliance. Its Moisture Sensitivity Level (MSL 1) allows unlimited floor life, making it suitable for high-volume production.

CAT4002ATD-GT3 Features

• Linear Topology: Ensures low-noise operation, ideal for noise-sensitive applications.
• Dual Outputs: Independent 20mA channels enable flexible LED configurations.
• Wide Voltage Range (2.4V–5.5V): Compatible with Li-ion batteries and low-voltage systems.
• Integrated Switches: Reduces BOM count and PCB footprint.
• MSL 1 (Unlimited): No baking required, streamlining manufacturing.
• Tape & Reel Packaging: Optimized for pick-and-place assembly.
• ROHS3/REACH Compliant: Meets stringent environmental standards.

CAT4002ATD-GT3 Applications

• Backlighting: LCD displays in portable electronics (e.g., smartphones, tablets).
• Indicator Lighting: Status LEDs in industrial/consumer devices.
• Battery-Powered Systems: Low-voltage operation suits handheld/wearable devices.
• Automotive Clusters: Secondary lighting where linear drivers reduce EMI risks.

Conclusion of CAT4002ATD-GT3

The CAT4002ATD-GT3 excels in space-constrained, low-voltage designs requiring reliable LED driving with minimal external components. Its linear architecture avoids switching noise, while dual-channel flexibility supports diverse lighting layouts. Though obsolete, its compliance and packaging make it a viable choice for legacy or cost-sensitive projects. Engineers should evaluate alternatives for new designs but can leverage this IC for backlighting and indicator applications where simplicity and noise immunity are critical.