CAT3637HV3-GT2

Overview

The CAT3637HV3-GT2 is a six-channel LED driver IC manufactured by onsemi, designed for backlight applications. It integrates a switch-capacitor charge pump topology to regulate output voltage up to 7V. The device operates within a supply voltage range of 2.5V to 5.5V and delivers a constant current of 30mA per channel. It functions at a switching frequency between 800kHz and 1.1MHz. The component supports multi-step dimming control and is housed in a 16-TQFN (3x3) package with an exposed pad. It is rated for operation from -40°C to +85°C ambient temperature.

Feature Summary

• Integrates a switch-capacitor charge pump for efficient LED regulation without external inductors
• Provides independent current control across six output channels
• Supports multi-step dimming functionality for brightness adjustment
• Includes internal switching elements to minimize external component count

Applications

• LCD backlight drivers
• Portable electronic displays
• Mobile device illumination systems

Procurement Notes

Verify the specific suffix GT2 against the official datasheet to confirm pinout and thermal pad configuration. Confirm that the part status is End-of-Life (EOL) as indicated by discontinuance notices dated around 2014. Ensure compatibility with existing PCB layouts before sourcing from secondary distributors, as original manufacturer production has ceased.

Selection Notes

Select this component when designing low-profile LED backlight circuits requiring a compact solution. The integrated charge pump eliminates the need for bulky inductors, saving board space. Verify that the required LED string voltage does not exceed the 7V output limit. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range for reliable performance.

Part Context

This part belongs to the CAT3637 family of LED drivers from onsemi. It is specifically engineered for portable electronics where size and efficiency are critical. The HV3 suffix typically denotes specific binning or packaging variations within the broader product line. It serves as a specialized power management IC for visual display interfaces in consumer devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the End-of-Life status, direct replacements should be identified through official obsolescence management channels or by consulting updated onsemi portfolios for equivalent six-channel LED drivers.