MIC5190BMM

Overview

The MIC5190BMM is an ultra high-speed, high-current active filter and LDO controller manufactured by Microchip Technology (formerly Micrel). It utilizes an external N-Channel FET as the power device to achieve signal bandwidths exceeding 500kHz. The device features a +1.0% initial output tolerance and supports an input voltage range of 0.9V to 5.5V. Dropout voltage reaches as low as 25mV at 10A. It offers adjustable output voltages down to 0.5V using an internal 0.5V reference. The component is housed in a 10-lead MSOP-10 package and operates within a junction temperature range of –40°C to +125°C.

Feature Summary

• Ultra-high-speed linear regulation with large signal bandwidth greater than 500kHz for fast load demands
• Active filtering capability that removes switching frequency noise from input supplies
• Logic-controlled shutdown and current limit protection for system management
• Stable operation with any type or value of output capacitor

Applications

• Distributed power supplies on circuit boards
• ASIC power supplies requiring clean voltage rails
• DSP, microprocessor, and microcontroller core power supplies

Procurement Notes

Verify the specific ordering suffix 'MM' corresponds to the MSOP-10 package configuration when sourcing replacements. Confirm that the required external N-Channel MOSFET meets the gate capacitance and thermal dissipation requirements specified in the datasheet. Ensure VCC supply voltage remains within the 4.5V to 13.2V operating range for proper driver functionality.

Selection Notes

Select this controller when designing systems requiring extremely fast transient response times and high DC gain. It is suitable for applications where minimizing output capacitance while maintaining stability is critical. Consider the need for an external pass element and ensure the PCB layout supports the separation of signal ground (SGND) and power ground (PGND) for optimal noise performance.

Part Context

The MIC5190 series belongs to Microchip's portfolio of specialized power management integrated circuits designed for high-performance computing and communication applications. This specific model functions as a controller rather than a complete regulator, requiring external components to form a complete power stage. It addresses the challenges of powering low-voltage, high-current digital loads.

Replacement Considerations

MIC5190YMM

FAQ

What is the minimum output voltage achievable with the MIC5190BMM?

The minimum output voltage is 0.5V, which occurs when the feedback resistor R1 is set to zero.

How does the MIC5190 handle output capacitor stability?

The device is designed to be stable with any type or value of output capacitor, including ceramic capacitors without ESR constraints.