AP2191DWG-7

Overview

The AP2191DWG-7 is a single-channel high-side power switch IC designed for USB 2.0 power distribution 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 maximum on-resistance of 115 mΩ. The device features a fixed current limit of 2.1 A, ensuring protection against overload conditions. Switching characteristics include a maximum turn-on time of 50 µs and a maximum idle time of 50 µs. It is housed in a surface-mount SOT-25-5 package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates fixed current limiting and thermal shutdown for robust fault protection
• Provides reverse current blocking to prevent backflow from load to source
• Includes under-voltage lockout (UVLO) to ensure stable operation during power transitions
• Features a status flag output for monitoring switch state and fault conditions

Applications

• USB 2.0 hub power switching
• Portable device peripheral power management
• Consumer electronics load switching
• Battery-powered equipment power distribution

Procurement Notes

Verify the specific suffix 'DWG-7' corresponds to the SOT-25-5 package and tape-and-reel quantity when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates prior to procurement. Ensure the ordering part number matches the required pin configuration and lead finish specifications defined in the datasheet to avoid integration errors.

Selection Notes

Select this component for designs requiring a single-channel high-side switch with integrated protection features. The 1.5 A continuous current rating suits standard USB loads, while the 2.1 A limit provides headroom for transient spikes. Consider the SOT-25-5 footprint for space-constrained layouts. Evaluate the 115 mΩ on-resistance impact on power dissipation relative to ambient temperature constraints.

Part Context

This part belongs to the AP2191 series of power switches from Diodes Incorporated, specialized for USB power distribution. It complements other variants like the AP2191FMG-7 and AP2191MPG-13, which offer different package options such as DFN and MSOP. The series focuses on providing compact, protected switching solutions for portable electronics and USB peripherals.

Replacement Considerations

The AP2171DWG-7 serves as a related alternative within the same manufacturer portfolio, offering similar functionality but with a 1 A output current rating instead of 1.5 A. Verify that the lower current capacity meets the application requirements before substitution. Other family members like the AP2191FMG-7 provide equivalent electrical performance in different physical packages.