AP2141WG-7

Overview

The AP2141WG-7 is a single-channel, current-limited high-side power switch manufactured by Diodes Incorporated. Designed for USB and hot-swap applications, it operates within an input voltage range of 2.7V to 5.5V. The device features an accurate current limit of 0.8A and a typical on-resistance of 95mΩ. It includes integrated over-current and thermal protection with short-circuit capabilities. The part offers controlled rise time, under-voltage lockout, and reverse current blocking. An open-drain Flag output provides fault reporting with a 7ms deglitch capability. It supports active-low enable logic and delivers very low shutdown current.

Feature Summary

• Integrated over-current and thermal protection with short-circuit handling
• Active-low enable control for simplified interface integration
• Open-drain Fault Flag output with 7ms blanking time for reliable status reporting
• Reverse current blocking to prevent backflow when disabled

Applications

• USB port power switching in consumer electronics
• Hot-swap applications in computing peripherals
• Power distribution in set-top boxes and GPS devices
• Protection circuits in docking stations and hubs

Procurement Notes

Verify the specific suffix 'WG' against the manufacturer datasheet to confirm package type and tape/reel specifications. Ensure the active-low enable characteristic matches the system design requirements. Confirm RoHS compliance and lead-free finish status as per the latest production data. Cross-reference the operating temperature range with environmental constraints.

Selection Notes

Select this component for single-channel high-side switching where precise current limiting is required. The 0.8A limit suits standard USB peripheral loads. Consider the 95mΩ on-resistance for efficiency calculations. The active-low enable pin simplifies control logic compared to active-high variants. Ensure the 2.7V minimum start-up voltage aligns with the supply rail.

Part Context

This part belongs to the AP2141/AP2151 family of power switches optimized for Universal Serial Bus (USB) applications. The AP2141 variant specifically utilizes active-low enable logic, distinguishing it from the AP2151 which uses active-high enable. Both share similar electrical characteristics including current limiting and protection features, but differ in control polarity.

Replacement Considerations

AP2151WG-7: Functionally identical but requires active-high enable logic instead of active-low. Verify control signal inversion if used as a direct substitute.