UCC3917N

Overview

The UCC3917N is a positive floating hot-swap power manager manufactured by Texas Instruments. Designed for commercial temperature ranges, it manages power insertion into backplane systems without causing voltage droops or system resets. The device integrates current limiting and thermal protection to safeguard the load during fault conditions. It operates within a supply voltage range of 8.5 V to 10.5 V and draws a typical operating supply current of 2 mA. The component is housed in an 8-pin PDIP package suitable for through-hole mounting.

Feature Summary

• Provides controlled power insertion to prevent bus collapse during module hot-plugging
• Integrates adjustable current limiting with foldback characteristics for robust fault protection
• Includes thermal shutdown circuitry to protect the device from overheating

Applications

• Backplane power management in telecommunications equipment
• Hot-swappable server and storage subsystems
• Industrial control systems requiring safe module replacement

Procurement Notes

Verify the specific suffix and revision level against the official datasheet to ensure compatibility with your design requirements. Confirm end-of-life status and availability through authorized distributors, as this component may be subject to obsolescence notices. Check RoHS compliance details for environmental regulations relevant to your region.

Selection Notes

Select this component when designing systems that require positive voltage hot-swap capabilities with integrated current limiting. Ensure the input voltage range aligns with your system's power bus specifications. Consider the PDIP-8 package constraints for PCB layout and thermal dissipation needs compared to surface-mount alternatives.

Part Context

This part belongs to the UCC391x family of hot-swap controllers from Texas Instruments. These devices are specialized PMICs designed to manage the insertion and removal of powered modules safely. The UCC3917N specifically addresses positive voltage applications, distinguishing it from negative voltage counterparts like the UCC1913 series.

Replacement Considerations

Public confirmed substitute part numbers: None.