MIC5191YML-T5

Overview

The MIC5191YML-T5 is an ultra high-speed linear regulator controller utilizing an external N-Channel FET. It features a +1.0% initial output tolerance and adjustable output voltage down to 1.0V. The device supports an input voltage range of 1.0V to 5.5V with dropout as low as 25mV at 10A. It offers large signal bandwidth exceeding 500kHz and PSRR greater than 40dB at 500kHz. Operating junction temperature ranges from –40°C to +125°C in a 10-pin 3mm×3mm MLF package.

Feature Summary

• Ultra high-speed operation with signal bandwidths exceeding 500kHz for fast load transient response
• Filters switching frequency noise on the input while maintaining clean output voltage
• Logic-controlled shutdown and current limit protection for system safety
• Stable with any output capacitor type, allowing flexible compensation design

Applications

• Distributed power supplies for board-level regulation
• ASIC power supplies requiring low noise and high speed
• DSP, microprocessor, and microcontroller core power supplies

Procurement Notes

Verify the specific suffix 'T5' indicates tape and reel packaging if required by assembly equipment. Confirm the 'Y' designation corresponds to the Pb-Free version as listed in the ordering information. Ensure the 10-pin MLF package matches the footprint requirements. Check that the operating temperature range meets the environmental specifications of the final application.

Selection Notes

Select this component when driving external N-Channel MOSFETs requires high bandwidth and low dropout performance. It is suitable for applications needing precise regulation with minimal output capacitance. Consider the thermal characteristics of the MLF package and ensure adequate PCB copper area for heat dissipation. Verify that the VCC supply voltage meets the gate drive requirements for the selected MOSFET.

Part Context

This part belongs to the MIC5191 family of active filter and LDO controllers manufactured by Micrel (now Microchip Technology). It is designed to complement switching regulators by filtering noise or acting as a standalone high-speed linear regulator. The MLF package provides a compact solution for space-constrained designs requiring high current capability.

Replacement Considerations

The MIC5191BML is the non-Pb-Free equivalent with identical electrical specifications. Verify pin compatibility and thermal performance when substituting between Pb-Free and non-Pb-Free variants. No other direct functional substitutes are documented in the provided datasheet.

FAQ

What is the minimum output voltage achievable with the MIC5191?

The MIC5191 can adjust the output voltage down to 1.0V using its internal 1.0V reference. For voltages below 1.0V, the MIC5190 should be used.

How does the MIC5191 handle stability with different output capacitors?

The device is stable with any type or value of output capacitor. External compensation via the COMP pin allows tailoring the loop gain and bandwidth for specific capacitor types and load conditions.