MIC3291-25YD6-TR

LED Driver IC Overview

The MIC3291-25YD6-TR is a PWM switching boost regulator optimized for constant current white LED driver applications. It operates with a supply voltage range of 2.5V to 6.5V and features an internal Schottky diode. The device supports single-wire linear brightness control without requiring a microcontroller. It delivers a switch current of 1.2A at a frequency of 1.2MHz. Output current is configurable from 20mA to 150mA using external resistors. The component is housed in a TSOT-23-6 package.

LED Driver IC Feature Summary

• Integrates an internal Schottky diode to simplify circuit design
• Supports single-wire linear brightness control via logic level signals
• Eliminates the need for a microcontroller for basic operation

LED Driver IC Applications

• Constant current white LED backlighting
• Portable electronic device illumination
• Stand-alone LED driver configurations

LED Driver IC Procurement Notes

Verify the specific suffix '25' corresponds to the required output current setting, as variations exist within the MIC3291 family. Confirm the TSOT-23-6 package type matches the PCB footprint requirements. Ensure the input voltage range of 2.5V to 6.5V aligns with the system power supply specifications before procurement.

LED Driver IC Selection Notes

Select this component when a compact solution for white LED driving is required without microcontroller overhead. The 1.2MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 1.2A switch current capability for driving multiple LEDs or higher brightness levels within the 20mA to 150mA regulated output range.

LED Driver IC Part Context

This part belongs to the MIC3291 series of LED drivers manufactured by Microchip Technology. The series includes variants such as the MIC3291-18YD6-TR, which differ primarily in output current settings. The MIC3291-25YD6-TR specifically targets applications requiring precise constant current regulation in a small form factor.

LED Driver IC Replacement Considerations

The MIC3291-18YD6-TR is a confirmed substitute within the same family, differing mainly in output current configuration. Verify that the pinout and package dimensions remain identical to ensure mechanical compatibility during replacement.