MIC2291YD5-TR

LED Driver IC Overview

The MIC2291YD5-TR is a 1.2MHz PWM boost-switching regulator optimized for high-current white LED photo flash applications. It features an internal switch with a guaranteed current of 1.2A and operates within an input voltage range of 2.5V to 10V. The device utilizes a constant frequency control scheme to minimize noise and input ripple. It offers adjustable output voltage up to 34V with over-voltage protection options. The component is housed in a low-profile TSOT-23-5 package and supports an operating junction temperature range from -40°C to +125°C.

LED Driver IC Feature Summary

• Implements constant frequency 1.2MHz PWM control to reduce noise and input ripple compared to variable frequency topologies.
• Features a low 95mV feedback voltage setting to minimize power dissipation in the current set resistor and reduce battery current draw.
• Includes integrated over-voltage protection and over-temperature protection mechanisms for enhanced system reliability.

LED Driver IC Applications

• White LED photo flash drivers
• High-current LED string driving
• Portable electronic devices requiring efficient boost regulation

LED Driver IC Procurement Notes

Verify the specific over-voltage protection rating required for your design, as the MIC2291 family includes variants with different OVP thresholds (e.g., 15V or 34V). Confirm that the TSOT-23-5 package aligns with your PCB footprint constraints. Ensure compatibility with your target input voltage range of 2.5V to 10V before finalizing procurement specifications.

LED Driver IC Selection Notes

Select this component when designing circuits that require precise PWM dimming for LED flashes. The 1.2A switch current capability allows driving multiple series-connected LEDs without external ballast resistors. Consider the thermal performance within the specified -40°C to +125°C junction temperature range during layout planning.

LED Driver IC Part Context

This part belongs to the MIC2291 series of boost regulators manufactured by Microchip Technology. It is designed specifically for applications demanding high efficiency and compact solutions. The series is commonly used in mobile phones and digital cameras where space and power efficiency are critical constraints.

LED Driver IC Replacement Considerations

Check datasheets for alternative parts within the MIC2291 family, such as those with different OVP ratings. Verify pinout compatibility if substituting with other manufacturers' LED driver ICs.