UC3833NG4

Overview

The UC3833NG4 is a precision low dropout linear controller manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 36 V and features a 2 V reference with 1% accuracy. The device includes an error amplifier, under-voltage lockout (UVLO), and a high-current driver capable of sourcing or sinking up to 100 mA. It supports both NPN and PNP external pass transistors. The component utilizes a duty-ratio current limiting technique for peak load capability and fault protection. It is housed in an 8-pin PDIP package.

Feature Summary

• Precision 1% internal reference voltage
• Duty-ratio current limiting for peak load capability
• High current driver supporting NPN or PNP pass transistors
• Integrated thermal shutdown and under-voltage lockout

Applications

• Low dropout linear regulator designs
• Medium power regulation systems
• Power supplies requiring short circuit protection without foldback

Procurement Notes

Verify the UC3833NG4 status as LIFEBUY on official Texas Instruments documentation before finalizing procurement plans. Confirm that the lead finish matches RoHS requirements for your assembly process. Ensure the 8-pin PDIP package dimensions align with your PCB layout constraints. Validate that the commercial temperature range meets your operational environment specifications.

Selection Notes

Select this controller when designing regulators requiring precise voltage references and robust fault protection. It is suitable for applications needing high peak currents during startup or transient loads. Consider the UC2832 series if additional pin access for adjustable current limits or logic-level disable inputs is required. Evaluate the need for industrial temperature ranges against the UC3833's commercial rating.

Part Context

The UC3833 belongs to the UCx832/3 family of precision low dropout linear controllers from Texas Instruments. This family provides essential control functions for regulating external pass transistors. The UC3833 specifically offers a simplified 8-pin configuration compared to the 14-pin UC2832, making it ideal for cost-sensitive and space-constrained designs while maintaining core regulation capabilities.

Replacement Considerations

Public confirmed substitute part numbers: UC3833N.