AP2191AFM-7

Overview

The AP2191AFM-7 is a single-channel high-side power switch manufactured by Diodes Incorporated, designed for USB power distribution applications. It features a P-channel MOSFET output capable of handling a continuous load current of 1.5A with a typical on-resistance of 90 milliohms. The device operates within an input voltage range of 2.7V to 5.5V and includes integrated protection mechanisms such as fixed current limiting, over-temperature shutdown, reverse current blocking, and under-voltage lockout. Packaged in a compact 6-DFN2018 (2.0x1.8mm) surface-mount footprint, it supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates fixed current limiting, over-temperature protection, and reverse current blocking for robust fault management
• Features a low on-resistance P-channel switch to minimize power loss and heat generation during operation
• Includes status flag output to indicate active state or fault conditions without external sensing components

Applications

• USB hub power switching and port protection
• Portable electronic device battery load switching
• Consumer electronics power distribution networks

Procurement Notes

Verify the specific suffix 'AFM-7' against the manufacturer's official datasheet to confirm the package type and tape/reel specifications. Ensure that the ordering code matches the required 6-DFN2018 footprint and lead-free compliance standards. Cross-reference the part number with authorized distributors to confirm availability and authenticity before finalizing procurement orders.

Selection Notes

Select this component when a single-channel high-side switch with 1.5A capacity and integrated thermal/current protection is required. Compare the 90 milliohm on-resistance against system efficiency requirements. Verify that the 2.7V to 5.5V input range aligns with the source voltage rails. Consider the 6-DFN2018 package size for space-constrained PCB layouts compared to larger SOP packages.

Part Context

The AP2191 series represents Diodes Incorporated's line of USB power switches designed for portable applications. This specific model provides a compact solution for managing power delivery to downstream peripherals. It belongs to the broader category of power distribution ICs, offering integrated protection features that simplify circuit design by eliminating the need for discrete protection components.

FAQ

Does the AP2191AFM-7 support reverse current flow?

Yes, the device includes built-in reverse current blocking functionality to prevent backflow from the load to the source.

What is the maximum operating temperature for this switch?

The component is rated for an ambient operating temperature range up to +85°C.