MIC5191YML-TR

Overview

The MIC5191YML-TR is an ultra high-speed linear regulator controller manufactured by Microchip Technology, utilizing an external N-Channel FET as the power device. It features a +1.0% initial output tolerance and supports an input voltage range of 1.0V to 5.5V. The component achieves dropout down to 25mV at 10A and provides large signal bandwidth exceeding 500kHz with PSRR greater than 40dB at 500kHz. It operates within a junction temperature range of –40°C to +125°C and is available in a 10-pin 3mm x 3mm MLF package.

Feature Summary

• Ultra high-speed capabilities handle fast load demands for microprocessor cores and ASICs while maintaining clean output voltage.
• Filters out switching frequency noise on the input and maintains stability with any type or value of output capacitor.
• Features logic-controlled shutdown and current limit protection for enhanced system reliability.

Applications

• Distributed power supplies
• ASIC power supplies
• DSP, µP, and µC power supplies

Procurement Notes

Verify the specific ordering suffix '-TR' against the manufacturer's official documentation to confirm reel packaging specifications. Confirm that the 'Y' designation aligns with the required Pb-Free status and operating temperature range. Ensure the selected package variant matches the intended PCB footprint requirements.

Selection Notes

Select this controller when designing systems requiring high transient response speeds and low output capacitance. It is suitable for applications needing precise regulation of voltages at 1.0V and higher. Consider the requirement for an external N-Channel MOSFET and appropriate compensation components to optimize loop stability.

Part Context

The MIC5191 is part of Micrel's (now Microchip) portfolio of high-performance power management integrated circuits. Originally developed by Micrel Inc., it serves as a specialized active filter and LDO controller designed to address the stringent power delivery requirements of modern high-speed digital logic and processing units.

Replacement Considerations

MIC5191BML

FAQ

What is the minimum output voltage supported by the MIC5191?

The MIC5191 is optimized for output voltages of 1.0V and higher. For output voltages less than 1.0V, the MIC5190 should be used.

How does the MIC5191 handle output capacitor selection?

The MIC5191 is stable with any type or value of output capacitor, including ceramic capacitors with low ESR and ESL, allowing designers to prioritize transient response characteristics.