AP22818BKAWT-7

Overview

The AP22818BKAWT-7 is a USB power switch IC manufactured by Diodes Incorporated, designed for high-side load switching applications. It features an N-channel output configured for single-channel operation with a 1:1 input-to-output ratio. The device operates within a supply voltage range of 2.7V to 5.5V and supports a maximum continuous output current of 2A. Key electrical characteristics include a typical on-resistance of 75 milliohms and a non-inverting control interface. Integrated protection mechanisms provide fixed current limiting, overtemperature shutdown, reverse current blocking, short-circuit protection, and undervoltage lockout (UVLO). The component utilizes a TSOT-25 surface-mount package and functions reliably across an ambient temperature range of -40°C to +85°C.

Feature Summary

• Integrated fault protection including fixed current limit, overtemperature shutdown, and reverse current blocking
• Status flag output with integrated debounce capability for reliable event reporting
• High-side N-channel configuration optimized for USB power distribution
• Undervoltage lockout ensures stable operation during power sequencing

Applications

• USB port power management in portable computing devices
• Hot-swap load switching for peripheral connections
• Power distribution networks in consumer electronics
• Battery-powered equipment requiring efficient load control

Procurement Notes

Verify the specific suffix 'BKA' against the official datasheet to confirm the enable pin logic polarity and package variant. Ensure the ordering quantity aligns with the manufacturer's standard reel packaging requirements. Confirm RoHS compliance status and check for any recent product change notifications that may affect pin compatibility or material composition before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring robust USB power switching with integrated thermal and electrical protection. The non-inverting interface simplifies control logic integration compared to inverted variants. Consider the 75 milliohm on-resistance for efficiency calculations in low-voltage applications. Verify that the TSOT-25 package dimensions fit the available PCB real estate and that the 2A current rating exceeds the maximum expected load requirements.

Part Context

This part belongs to the AP22818 series of USB power switches from Diodes Incorporated. The series is engineered to meet USB specification requirements for overcurrent and thermal protection. Variants within the family typically differ by enable pin polarity and specific package options. The AP22818BKAWT-7 represents a specific configuration within this lineup, tailored for applications needing high-side switching with status monitoring capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific model are not available in the provided documentation. When evaluating alternatives, verify that replacement components match the 2.7V to 5.5V operating range, 2A current capacity, and TSOT-25 footprint. Ensure equivalent protection features such as UVLO and reverse current blocking are present to maintain system safety.

FAQ

What is the function of the status flag output?

The status flag provides a signal indicating fault conditions, featuring integrated debounce to prevent false triggering during transient events.

Does the AP22818BKAWT-7 support reverse current flow?

No, the device includes built-in reverse current blocking to prevent backflow from the load to the source.

How does the device handle overtemperature conditions?

The IC incorporates automatic overtemperature shutdown protection that disables the output if the junction temperature exceeds safe limits.