AP2181DWG-7

Overview

The AP2181DWG-7 is a single-channel high-side power switch from Diodes Incorporated, designed for USB and hot-swap applications. It operates within a supply voltage range of 2.7 V to 5.5 V and supports an output current of 1.5 A with a fixed current limit of 2.1 A. The device features a maximum on-resistance of 115 mOhms and is housed in an SOT-25 package. It includes thermal limiting, short-circuit protection, and under-voltage lockout. The component functions across an ambient temperature range of -40°C to +85°C.

Feature Summary

• Integrated over-current and thermal protection with accurate current limiting
• Active low enable input for control logic compatibility
• Output discharge capability for safe load removal
• Reverse current blocking to prevent backflow

Applications

• USB port power switching
• Hot-swap peripheral connections
• Battery-powered equipment power distribution

Procurement Notes

Verify the suffix WG indicates the SOT-25 package configuration when sourcing. Confirm RoHS compliance status through official manufacturer documentation or certified datasheets prior to integration. Ensure the active low enable polarity matches the system control logic requirements. Cross-reference the specific revision number against the latest Diodes Incorporated product change notifications to guarantee material consistency and manufacturing origin accuracy.

Selection Notes

Select this component for single-channel high-side switching where compact SOT-25 packaging is required. It is suitable for designs needing 1.5 A continuous load handling with integrated fault protection. Consider the active low enable signal requirement for interface compatibility. Evaluate the 115 mOhm on-resistance impact on power dissipation relative to the thermal environment and PCB copper area available for heat spreading during operation.

Part Context

This part belongs to the AP2181 series of single-channel power switches optimized for Universal Serial Bus applications. The series provides integrated protection features including current limiting and thermal shutdown. The DWG suffix specifically denotes the SOT-25 surface-mount package variant, distinguishing it from other package options like SO-8 or MSOP-8 within the same functional family.

Replacement Considerations

AP2191DWG-7: Identical electrical specifications but utilizes an active high enable input instead of active low.