AP2191DFMG-7

Overview

The AP2191DFMG-7 is a single-channel high-side power switch manufactured by Diodes Incorporated. It features a P-channel output configured for USB applications, supporting load voltages from 2.7V to 5.5V with a maximum continuous output current of 1.5A. The device utilizes a 6-UFDFN package with exposed pad (6-DFN2018, 2.0x1.8mm). Key electrical parameters include a typical on-resistance of 90 milliohms and a fixed current limit of 2.1A. It operates within an ambient temperature range of -40°C to +85°C and employs an On/Off interface.

Feature Summary

• Integrated fault protection including fixed current limiting, overtemperature shutdown, reverse current blocking, and under-voltage lockout.
• Provides status flag indication for monitoring operational state.
• Designed specifically for USB power distribution and switching applications.

Applications

• USB port power switching
• Peripheral power distribution
• Battery-powered device load control

Procurement Notes

Verify the specific suffix 'DFMG-7' against official Diodes Incorporated documentation to confirm the exact tape-and-reel quantity and packaging configuration. Ensure the component matches the 6-DFN2018 footprint dimensions and thermal pad requirements for proper PCB layout integration. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and supply chain integrity before procurement.

Selection Notes

Select this component when a compact, single-channel high-side switch is required for 5V USB systems. The low on-resistance minimizes power dissipation compared to higher resistance alternatives. Consider the 6-DFN2018 package size constraints and thermal performance needs. Verify that the 1.5A continuous current rating and 2.1A limit meet the specific load requirements of the target application circuit.

Part Context

This part belongs to the AP2191 series of USB power switches from Diodes Incorporated. The series offers various packages and channel configurations. The DFMG-7 variant specifically denotes the 6-lead DFN package. This family is designed to replace discrete MOSFET solutions in space-constrained portable electronics, providing integrated protection and simplified design.

Replacement Considerations

AP2191FMG-7: Same functional specifications but may differ in reel packaging or specific manufacturing lot codes; verify package compatibility.

FAQ

What is the maximum load voltage supported by the AP2191DFMG-7?

The device supports load voltages ranging from 2.7V to 5.5V.

Does the AP2191DFMG-7 support reverse current flow?

No, the device includes reverse current blocking as part of its fault protection features.