MIC5191BMM

Overview

The MIC5191BMM is an ultra high-speed linear regulator controller manufactured by Microchip Technology, housed in a 10-pin MSOP package. It operates with an input voltage range of 1.0V to 5.5V and supports adjustable output voltages down to 1.0V. The device utilizes an external N-Channel FET as its power element, achieving dropout voltages as low as 25mV at 10A. It features a large signal bandwidth exceeding 500kHz and provides logic-controlled shutdown functionality along with current limit protection.

Feature Summary

• Ultra high-speed capabilities handle fast load demands for microprocessor cores and ASICs
• Filters switching frequency noise from input sources while maintaining clean output voltage
• Stable operation with any type or value of output capacitor
• Logic controlled shutdown and current limit protection

Applications

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

Procurement Notes

Verify the specific suffix 'B' against the manufacturer's official documentation to confirm it denotes standard Pb-Free compliance. Ensure the selected package matches the required thermal dissipation characteristics for the target application. Confirm that the operating junction temperature range aligns with the system environment requirements before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring high-speed transient response and low output capacitance. It is suitable for applications needing precise regulation of microprocessor cores and ASICs. Ensure the external N-Channel MOSFET selection accounts for gate capacitance limits to maintain optimal slew rates and transient performance within the specified bandwidth constraints.

Part Context

This part belongs to the MIC5191 family of ultra high-speed active filter and LDO controllers. It is designed to replace bulkier filtering solutions by providing high bandwidth regulation directly at the load point. The MSOP package variant offers a compact footprint suitable for dense board layouts while maintaining the electrical performance of the broader series.

Replacement Considerations

MIC5191YML

FAQ

What is the minimum output voltage achievable with the MIC5191BMM?

The MIC5191BMM supports adjustable output voltages down to 1.0V.

How does the MIC5191BMM handle switching noise?

It filters out switching frequency noise on the input, significantly reducing ripple and high-frequency noise on the output.