MIC5191BML-TR

Overview

The MIC5191BML-TR is an ultra high-speed linear regulator controller manufactured by Microchip Technology, utilizing an external N-Channel FET as its power device. It features a +1.0% initial output tolerance and adjustable output voltage down to 1.0V. The device operates with an input voltage range of 1.0V to 5.5V and supports junction temperatures from –40°C to +125°C. It provides dropout down to 25mV at 10A, filters switching frequency noise on the input, and maintains a large signal bandwidth greater than 500kHz with PSRR exceeding 40dB at 500kHz.

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 achieves excellent line and load regulation specifications.
• Logic controlled shutdown and current limit protection ensure operational safety and flexibility.
• Stable with any output capacitor type, allowing design optimization for specific transient response requirements.

Applications

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

Procurement Notes

Verify the exact suffix 'BML' against the manufacturer's official documentation to confirm package type and lead-free status. Confirm availability through authorized distributors as this component may be subject to lifecycle changes or discontinuation notices. Ensure the ordering information matches the required thermal performance and electrical characteristics for your specific application environment.

Selection Notes

Select the MIC5191BML-TR when designing systems requiring ultra-high speed transient response for low-voltage, high-current loads. This controller is suitable for post-regulating switching power supplies to reduce ripple and noise. Ensure the external N-Channel MOSFET selection accounts for gate capacitance limits and thermal dissipation requirements to maintain stability and efficiency within the specified operating temperature range.

Part Context

The MIC5191 series includes variants such as the MIC5191YML and MIC5191BMM, offering different packaging options like 10-pin MSOP. These controllers are designed to replace traditional LDOs in applications demanding superior dynamic performance. The BML variant specifically utilizes a compact MLF package, facilitating dense PCB layouts for modern embedded processor and controller power architectures.

Replacement Considerations

Public confirmed substitute part numbers: MIC5191YML-T5