AP22811BW5-7

Overview

The AP22811BW5-7 is a high-side power switch IC from Diodes Incorporated, designed for USB and hot-plug applications. It features a single input and five outputs within an SOT-25 package. The device operates with a supply voltage range of 2.7V to 5.5V and supports a continuous output current of 3.2A. Key electrical parameters include a maximum on-resistance (RdsOn) of 90mΩ and a fixed current limit of 2.7A. It functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated load switch with automatic recovery protection against over-current, short-circuit, and over-temperature conditions.
• Built-in soft-start mechanism ensures controlled rise time to manage inrush current during power-up.
• Includes an integrated output discharge function for complete and controlled capacitor discharge upon shutdown.
• Features a fault flag output with built-in de-bouncing capability to prevent erroneous over-current reporting.

Applications

• Universal Serial Bus (USB) port power switching
• Hot-plug applications requiring robust protection
• Consumer electronics power distribution
• Telecommunications system power management

Procurement Notes

Verify the specific suffix 'W5' corresponds to the required tape and reel packaging configuration for automated assembly. Confirm that the 90mΩ RdsOn specification aligns with thermal requirements for the target 3.2A load current. Ensure the low-active enable logic matches the control signal polarity of the host system design.

Selection Notes

Select this component when a high-side switch with integrated fault protection and controlled turn-on characteristics is required. The AP22811 series is suitable for applications needing reverse current blocking and UVLO functionality. Compare the 90mΩ on-resistance against lower resistance alternatives if conduction losses are critical, while noting the trade-off with cost and availability.

Part Context

This part belongs to the AP22811 series of single-channel high-side power switches. It is optimized for USB compliance and general hot-plug scenarios. The series provides comprehensive protection features including auto-recovery mechanisms, distinguishing it from basic mechanical switches or unprotected MOSFETs. It integrates control logic with the power stage in a compact surface-mount package.

Replacement Considerations

The AP22811AW5-7 is a pin-compatible alternative within the same family, differing primarily in enable pin logic polarity (high-active vs. low-active). Verify that the enable signal levels in the existing circuit design are compatible with the replacement's active state before substitution.