UC2833DWG4

Overview

The UC2833DWG4 is a precision low dropout linear controller from Texas Instruments, housed in a 16-pin SOIC package. It operates within an input voltage range of 4.5 V to 36 V and features a highly accurate 2 V reference with a tolerance of ±1%. The device includes an error amplifier, under-voltage lockout, and thermal shutdown for safe operation. It provides a high-current driver capable of sourcing or sinking up to 450 mA, supporting both NPN and PNP external pass transistors. The industrial temperature rating spans from -40°C to +85°C.

Feature Summary

• Innovative duty-ratio current limiting technique that accommodates high initial load demands and short circuit protection without requiring extra heat sinking or foldback current limiting.
• Integrated high-current driver with separate source and sink outputs, enabling the use of either NPN or PNP external pass transistors for flexible regulator topologies.
• Includes essential control functions such as a precision 2 V reference, error amplifier, under-voltage lockout, and thermal shutdown to ensure robust performance.

Applications

• Designing very low dropout linear regulators
• Power supply systems requiring peak load capability
• Applications needing short circuit protection without foldback current limiting

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status according to the manufacturer's documentation. Confirm the SOIC-16 package dimensions and pinout match your PCB layout requirements. Ensure the industrial temperature range (-40°C to +85°C) aligns with your system's operational environment. Cross-reference the datasheet revision date to confirm the accuracy of electrical characteristics before finalizing design specifications.

Selection Notes

Select this component when designing precision linear regulators that require duty-ratio current limiting to manage peak loads efficiently. It is suitable for applications where both NPN and PNP pass transistors are viable options due to its dual output driver. Consider the 4.5 V to 36 V input range and the need for integrated thermal and under-voltage protection when evaluating power management solutions.

Part Context

The UC2833DWG4 belongs to the UCx832/3 series of precision low dropout linear controllers. This family shares core functionalities but varies in pin count and feature sets; the UC2833 specifically offers the basic design functions in a cost-effective 16-pin surface mount package. It is part of a broader lineup that includes variants like the UC2832, which provides additional versatility with more pins and adjustable current limit features.

Replacement Considerations

UC2833DW