MIC2077-2BN

Overview

The MIC2077-2BN is a quad high-side power switch IC from Microchip Technology, formerly Micrel. It provides four independent USB power distribution channels with integrated current limiting and thermal shutdown protection. The device operates within a supply voltage range of 2.7 V to 5.5 V and features a maximum on-resistance of 150 mΩ per channel. It supports a continuous current limit of 900 mA and includes soft-start circuitry to minimize inrush currents for capacitive loads. The component is housed in a 16-pin SOIC-wide package and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrated smart thermal shutdown that latches off the output during fault conditions until the load is removed or the enable input is toggled.
• Internal transient current limit filtering prevents false triggering during short-duration overcurrent events.
• Soft-start circuitry minimizes inrush current when powering highly capacitive loads.

Applications

• General-purpose power distribution requiring circuit protection
• USB port power switching and management
• Development tool selector platforms

Procurement Notes

Verify the specific suffix against official Microchip documentation, as the 'B' variant may indicate obsolete status or distinct packaging compared to the standard 'Y' series. Confirm RoHS compliance details directly with the manufacturer, as some older variants may not meet current environmental standards. Ensure the 16-pin SOIC-wide package matches your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring four independent high-side switches with built-in protection against overcurrent and thermal faults. The 900 mA current limit and 150 mΩ on-resistance make it suitable for low-power USB distribution. Consider the active-high enable logic and fault status flag outputs if system monitoring is required. Verify availability as the 'B' suffix may represent an older generation compared to the currently active 'YM' or 'YWM' variants.

Part Context

The MIC2077 series consists of quad high-side MOSFET switches optimized for general-purpose power distribution. Manufactured by Microchip Technology following its acquisition of Micrel, these devices integrate current limiting and thermal shutdown to protect both the switch and the load. The series is available in narrow and wide SOIC packages, providing flexibility for various board space constraints.

Replacement Considerations

Public documentation indicates the MIC2077-2BM is obsolete and should be replaced with the MIC2077-2YM (RoHS compliant). Verify if the MIC2077-2YWM or MIC2077-2YMTR are suitable direct replacements based on package and tape-and-reel requirements.