UC3832N

Overview

The UC3832N is a precision linear regulator controller designed for low dropout applications. It operates within a supply voltage range of 4.5 V to 36 V and features a 100 mA output drive capability, supporting both source and sink configurations. The device incorporates a 2 V reference with 1% accuracy and utilizes duty-ratio current limiting to manage peak load demands while restricting average power dissipation during faults. It includes under-voltage lockout (UVLO) and thermal shutdown mechanisms to ensure safe operation.

Feature Summary

• Integrates duty-ratio current limiting technique to provide peak load capability while controlling average power dissipation
• Features high-current driver outputs capable of sourcing or sinking current to accommodate NPN or PNP external pass transistors
• Includes built-in under-voltage lockout and thermal shutdown protection for reliable system safety

Applications

• Design of very low dropout linear regulators
• Power supplies requiring high initial load demand accommodation
• Systems needing short circuit protection without foldback current limiting

Procurement Notes

Verify the component status as LIFEBUY, indicating discontinuation with a limited lifetime-buy period available. Confirm package type PDIP-14 and commercial temperature range suitability. Ensure compliance with RoHS standards by checking for the G4 suffix if lead-free composition is required for the specific manufacturing process.

Selection Notes

Select this controller when designing low dropout regulators that require precise current limiting without complex foldback circuits. The UC3832N supports both NPN and PNP pass transistors due to its bidirectional driver. Consider the UC3833N if an 8-pin package suffices for the application requirements.

Part Context

Part of the UCx832/3 family of precision linear regulators manufactured by Texas Instruments. This series provides control functions for low dropout designs, distinguishing itself from switching controllers through its analog regulation approach and duty-ratio current limiting capabilities.

Replacement Considerations

UC3833N offers similar functionality in an 8-pin package.