MP3309LGQG-Z

LED Driver IC Overview

The MP3309LGQG-Z is a synchronous boost DC-DC converter and LED driver IC from Monolithic Power Systems. It features an internal switch, supporting an input voltage range of 2.7V to 5.5V and delivering up to 1.5A output current. The device operates at a fixed frequency of 640kHz with an output voltage capability of 24V. It supports both analog and PWM dimming methods for backlight applications. The component is housed in a compact 10-QFN (1.4x1.8mm) package and functions within a junction temperature range of -40°C to 125°C.

LED Driver IC Feature Summary

• Integrates a synchronous boost topology with an internal power switch for efficient step-up conversion.
• Supports dual dimming control modes including analog current adjustment and pulse-width modulation.
• Includes soft-start functionality to limit inrush current during startup sequences.

LED Driver IC Applications

• White LED backlighting for tablet computers
• White LED backlighting for smartphones

LED Driver IC Procurement Notes

Verify the specific suffix against official datasheets to confirm output voltage ratings, as variants like the standard MP3309GQG-Z may differ from the LGQG-Z version. Ensure the ordering code matches the required 24V output specification rather than other potential configurations within the MP3309 family. Confirm RoHS compliance status through manufacturer documentation prior to integration.

LED Driver IC Selection Notes

Select this component when designing single-channel WLED backlight circuits requiring a low input voltage range starting at 2.7V. The 640kHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 10-QFN package dimensions for PCB layout constraints in portable devices where space is limited.

LED Driver IC Part Context

This part belongs to the MP3309 series of LED lighting drivers designed by Monolithic Power Systems. It is specifically engineered for portable electronics such as tablets and smartphones. The series utilizes a synchronous boost architecture to drive white LEDs efficiently from single-cell lithium-ion battery sources.

LED Driver IC Replacement Considerations

The MP3309GQG-Z is a related variant within the same series but typically specifies a higher output voltage rating of 35V. Verify if the 24V output limitation of the LGQG-Z variant aligns with the target LED string configuration before substituting.