RT4533GJ6

Overview

The RT4533GJ6 is a single-output DC-DC boost converter LED driver IC manufactured by Richtek USA Inc. It integrates an internal switch capable of delivering up to 1.2A and operates with a fixed switching frequency of 1.1MHz. The device supports PWM dimming control for backlight applications. It functions within a supply voltage range of 2.5V to 5.5V and can drive loads up to a maximum output voltage of 36.5V. The component is housed in a TSOT-23-6 package and is rated for operation across a temperature range of -40°C to 85°C.

Feature Summary

• Integrates an internal power switch for compact circuit design
• Supports precise PWM dimming control for display backlighting
• Utilizes a step-up topology to drive high-voltage LED strings from low input sources

Applications

• Mobile phone LCD backlights
• Portable electronic device displays
• Small form-factor LED lighting systems

Procurement Notes

Verify the specific suffix GJ6 corresponds to the required TSOT-23-6 packaging configuration. Confirm that the application input voltage remains within the specified 2.5V to 5.5V range to ensure proper operation. Check for RoHS3 compliance requirements if applicable to the target market regulations.

Selection Notes

Select this component when a boost topology is required to drive LEDs from a single-cell lithium battery or similar low-voltage source. Ensure the peak current requirement does not exceed the 1.2A internal switch limit. Consider the TSOT-23-6 footprint constraints during PCB layout planning.

Part Context

This part belongs to the RT4533 family of LED drivers designed for portable consumer electronics. It serves as a specialized power management solution for regulating current in white LED arrays used in display backlighting systems.

Replacement Considerations

RT4533GJ6TR