UCC3919DG4

Overview

The UCC3919DG4 is a negative floating single industrial temperature range hot-swap voltage controller manufactured by Texas Instruments. It is designed for controlled power-up and shutdown in systems requiring load sharing or redundancy. The device features an integrated N-channel MOSFET driver, current limit control, and soft-start functionality to prevent inrush currents. It operates with a wide input voltage range suitable for various bus architectures. The component is housed in a small outline package (SOIC) with a narrow body, facilitating surface-mount assembly on printed circuit boards while maintaining thermal performance under continuous operation.

Feature Summary

• Integrated hot-swap controller with built-in MOSFET driver for simplified design
• Programmable current limit and soft-start capabilities to manage inrush energy
• Negative floating architecture supporting high-side switching applications
• Industrial temperature rating ensuring reliable operation in demanding environments

Applications

• Load sharing modules in redundant power supply systems
• Hot-swappable backplane power distribution units
• Controlled power sequencing for multi-rail electronic systems
• Telecommunications equipment requiring safe insertion and removal

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to confirm pinout compatibility and package dimensions. Ensure that the selected variant matches the required operating temperature range and electrical specifications for the target application. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require precise control over power ramp-up times and protection against overcurrent conditions during module insertion. Consider the negative floating topology if the application involves high-side switching relative to the system ground. Evaluate the thermal requirements of the PCB layout to ensure adequate heat dissipation for the integrated driver and control circuitry under maximum load conditions.

Part Context

This part belongs to the UCC391x series of hot-swap controllers from Texas Instruments. These devices are engineered for robust power management in industrial and telecommunications infrastructure. The DG4 suffix typically indicates a lead-free, halogen-free RoHS-compliant package variant, aligning with environmental regulations for modern electronics manufacturing and assembly processes.

Replacement Considerations

Public confirmed substitute part numbers only; omit otherwise.