MIC2040-1BMM

Overview

The MIC2040-1BMM is a single-channel high-side power distribution switch manufactured by Microchip Technology. It integrates a MOSFET optimized for general-purpose power distribution applications requiring circuit protection. The device supports an operating voltage range from 0.8V to 5.5V and provides up to 500mA continuous output current with a programmable current limit adjustable up to 1.5A. Key electrical parameters include a maximum on-resistance of 75mΩ, a maximum turn-on time of 800μs, and a maximum idle time of 5μs. It operates within a temperature range of -40°C to +85°C and is housed in an MSOP-10 package.

Feature Summary

• Integrates soft-start circuitry to minimize inrush current during the activation of highly capacitive loads.
• Provides fault status flag output to detect overcurrent and thermal shutdown conditions.
• Features undervoltage lockout and reverse current flow blocking when disabled.

Applications

• General purpose power distribution circuits requiring integrated protection
• Multi-port USB applications satisfying upstream or downstream power requirements
• Systems requiring short-circuit protection with thermal shutdown capabilities

Procurement Notes

Verify that the specific suffix '1BMM' corresponds to the intended package variant and tape/reel configuration as defined in the official Microchip datasheet. Confirm that the single-channel configuration meets the system's channel count requirements, distinguishing it from multi-channel variants within the same family. Ensure the operating voltage range aligns with the target load specifications.

Selection Notes

Select this component when a single-channel high-side switch with programmable current limiting is required. It is suitable for applications needing soft-start functionality to protect capacitive loads. Consider the 75mΩ on-resistance and 500mA output capability against the load demands. Verify compatibility with the MSOP-10 package constraints and the -40°C to +85°C operating temperature range.

Part Context

The MIC2040-1BMM belongs to the MIC2040/MIC2041 series of low-voltage power distribution switches. This series is designed for circuit protection in portable and industrial electronics. While the MIC2041 features an auto-reset circuit breaker mode, the MIC2040 variant typically lacks this specific latching reset function, relying instead on standard fault detection via the status flag. The part is part of Microchip's portfolio following its acquisition of Micrel technologies.

FAQ

Does the MIC2040-1BMM support auto-reset after an overcurrent event?

No, the MIC2040 series does not feature the auto-reset circuit breaker mode found in the MIC2041 variant. The output remains off until the fault condition is removed or the input is cycled.

What is the function of the fault status output pin?

The fault status output provides a signal to indicate when the device has detected an overcurrent condition or has entered thermal shutdown, allowing the system controller to monitor health.