UCC3919D

Overview

The UCC3919D is a hot swap controller manufactured by Texas Instruments, designed for general-purpose applications. It operates with a supply voltage ranging from 3 V to 8 V and is housed in a 16-SOIC surface-mount package. The device features under-voltage lockout (UVLO) and a supply current of 1 mA. Key programmable functionalities include auto retry, circuit breaker, current limit, fault timeout, and latched fault protection.

Feature Summary

• Integrates programmable auto retry and circuit breaker capabilities for robust power management
• Provides comprehensive fault protection including current limit, fault timeout, and latched fault mechanisms
• Includes under-voltage lockout (UVLO) for stable operation within specified voltage ranges

Applications

• General purpose hot swap controller implementations
• Systems requiring programmable current limiting and fault protection
• Applications necessitating auto retry functionality upon fault clearance

Procurement Notes

Verify component status carefully as the UCC3919D is classified as obsolete and no longer manufactured by Texas Instruments. Sourcing should focus on available substitutes such as the TPS24700DGK. Confirm package integrity and authenticity through authorized channels to ensure reliability, given the discontinued nature of this specific part number.

Selection Notes

Select this component only if legacy compatibility or specific historical design requirements mandate its use. Due to its obsolete status, engineers should evaluate modern alternatives like the TPS24700DGK for new designs. Ensure that the 16-SOIC package and 3 V to 8 V operating range align precisely with existing system constraints before proceeding with procurement.

Part Context

The UCC3919D belongs to Texas Instruments' hot swap controller family, which manages safe insertion and removal of circuit boards. This specific model emphasizes programmable protection features and UVLO. It serves as a specialized solution for managing power delivery in systems where controlled power-up sequences and fault isolation are critical operational requirements.

Replacement Considerations

The TPS24700DGK is listed as an available substitute for the UCC3919D. Evaluate pin compatibility and functional equivalence when transitioning to this replacement. Verify that the alternative meets all original design specifications regarding voltage range and protection features.