NCP4543IMN5RG-A

Overview

The NCP4543IMN5RG-A is a single-channel, high-side power switch from the ecoSWITCH™ series by onsemi. It features an N-channel output capable of handling up to 7.3A with a typical on-resistance of 10.5 mΩ. The device operates within a load voltage range of 3V to 5.5V and utilizes a non-inverting open/switch interface. Packaged in a compact 18-VFQFN (3x3 mm) with an exposed pad, it supports surface mount installation. The component includes controlled slew rate features to minimize inrush current and electromagnetic interference.

Feature Summary

• Integrated high-side load switch with N-channel output configuration
• Controlled slew rate functionality for soft-start capability
• Non-inverting input interface for direct logic control
• Compact 18-pin QFN package with exposed thermal pad

Applications

• Portable electronic devices requiring efficient power distribution
• Embedded systems needing protected power rails
• Consumer electronics with strict space constraints

Procurement Notes

Verify component status as this part is officially marked obsolete by the manufacturer. Confirm availability through authorized distributors or secondary market suppliers. Ensure compatibility with existing PCB footprints and design specifications before procurement. Check for RoHS compliance documentation if required for specific regulatory standards.

Selection Notes

Select this component for applications requiring a single high-side switch with moderate current capacity. The 10.5 mΩ on-resistance offers low conduction losses. Consider the 3V-5.5V operating range to ensure compatibility with system voltage levels. The 18-QFN package is suitable for dense board layouts. Evaluate thermal management requirements due to the exposed pad design.

Part Context

This part belongs to the ecoSWITCH™ family of power switches designed for energy-efficient applications. It serves as a load switch solution for managing power delivery in portable and embedded systems. The device integrates protection features and controls in a small form factor, replacing discrete MOSFET solutions.

Replacement Considerations

As the NCP4543IMN5RG-A is obsolete, verify equivalent parts from the same manufacturer or compatible alternatives. Check pinout compatibility and electrical parameters such as Rds(on) and current rating. Ensure the replacement supports the same 18-QFN package or requires adapter modifications.