LTC1477CS8#PBF

Overview

The LTC1477CS8#PBF is a single-channel protected high-side power switch manufactured by Analog Devices Inc. It operates within a supply voltage range of 2.7 V to 5.5 V and features an internal NMOS switch with a maximum on-resistance of 200 mΩ. The device provides short-circuit current limiting set at 2 A and includes thermal overload protection that activates at approximately 130°C. Packaged in an 8-lead SOIC, it supports surface-mount installation and functions across an operating temperature range from 0°C to +70°C.

Feature Summary

• Integrated charge pump generates gate drive voltage exceeding the input supply to fully enhance the internal NMOS switch
• Absence of parasitic body diode prevents reverse current flow when the output is forced above the input voltage
• Dual-stage protection system combining fixed short-circuit current limiting and thermal shutdown for fault management

Applications

• Laptop power management systems
• Peripheral power protection circuits
• Hot-swap board protection applications
• Power distribution networks requiring load protection

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix matches the required package and environmental compliance standards. Review the latest datasheet for any product change notifications or design updates. Ensure storage conditions adhere to moisture sensitivity level requirements prior to assembly.

Selection Notes

Select this component for low-voltage DC power distribution where compact size and integrated protection are critical. The single-channel configuration suits applications requiring one protected high-side output. Consider the 200 mΩ on-resistance for efficiency calculations and verify that the 2 A current limit aligns with the connected load requirements without unnecessary tripping.

Part Context

This part belongs to the LTC1477/LTC1478 family of protected high-side switches. While the LTC1478 offers dual channels in a 16-lead package, the LTC1477 provides a single channel in an 8-lead SOIC. Both share identical electrical characteristics and protection features, differing only in channel count and physical footprint.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternative components from other manufacturers.