AP2151AFM-7

Overview

The AP2151AFM-7 is a single-channel high-side power switch IC 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. The device features a maximum on-resistance of 11 mΩ and supports an output current of 0.5 A with an 800 mA current limit. Key timing parameters include a maximum turn-on time of 50 µs and a maximum turn-off time of 10 µs. It provides integrated protection against over-current, thermal overload, and undervoltage conditions.

Feature Summary

• Integrated high-side power switching optimized for Universal Serial Bus (USB) distribution
• Built-in protection mechanisms including current limiting, thermal shutdown, and undervoltage lockout
• Controlled rise time functionality to minimize inrush current during activation
• Open-drain flag output with deglitch capability for accurate fault reporting

Applications

• Universal Serial Bus (USB) power distribution circuits
• Hot-swap application interfaces
• Peripheral driver power management
• Over-current protection stages in consumer electronics

Procurement Notes

Verify the specific suffix 'FM' corresponds to the U-DFN2018-6 package when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates prior to integration. Ensure the enable input polarity matches the system design requirements as variants may differ. Cross-reference the datasheet revision date to ensure compatibility with latest electrical specifications.

Selection Notes

Select this component for designs requiring low on-resistance and precise current limiting in compact footprints. The U-DFN2018-6 package suits space-constrained PCB layouts. Evaluate the 2.7 V minimum operating voltage against the system's rail stability. Consider the 50 µs turn-on time for applications sensitive to inrush currents. Verify that the 800 mA current limit aligns with the downstream load requirements without nuisance tripping.

Part Context

This part belongs to the AP2151 series of single-channel current-limited power switches by Diodes Incorporated. The series includes variants with different packages such as SOIC-8, MSOP-8EP, SOT25, and U-DFN2018. All members share core functionalities like USB 2.0 compliance and integrated protection features, differing primarily in physical footprint and pin configuration.

Replacement Considerations

Compatible substitutes within the same family include AP2151AW-7 and AP2151AS-13. These alternatives offer similar electrical characteristics but utilize different packaging options such as SOP-8 or MSOP-8EP. Verify pin-to-pin compatibility and package dimensions before substitution to ensure mechanical fit.