UC3832NG4

Overview

The UC3832NG4 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 1% accurate 2 V reference. The device includes an error amplifier, under-voltage lockout (UVLO), and thermal shutdown protection. It provides 100 mA output drive capability with both source and sink outputs. The component utilizes a duty-ratio current limiting technique for peak load capability while managing average power dissipation.

Feature Summary

• Features a precision 1% reference voltage and over-current sense threshold accurate to 5%.
• Includes programmable duty-ratio over-current protection and adjustable current limit to current sense ratio.
• Provides high current driver with separate source and sink outputs for NPN or PNP pass transistors.
• Incorporates logic-level disable input and access to internal reference and error amplifier terminals.

Applications

• Precision low dropout linear regulators
• Medium power low dropout regulators
• Local 100mA regulators

Procurement Notes

Verify the UC3832NG4 status as LIFEBUY on official Texas Instruments documentation before finalizing procurement plans. Confirm that the PDIP-14 package matches the required mechanical footprint and pin configuration. Ensure compliance with RoHS and lead-free specifications indicated in the packaging data sheet. Validate operating temperature ranges against specific application environmental requirements.

Selection Notes

Select this component when designing precision linear regulators requiring duty-ratio current limiting. It supports both NPN and PNP external pass transistors due to its dual source/sink driver outputs. Consider the UC3833 variant if an 8-pin mini-dip package suffices for the design constraints. Verify that the 4.5 V to 36 V input range aligns with the system power supply architecture.

Part Context

The UC3832 belongs to the UCx832/UCx833 family of precision linear regulator controllers from Texas Instruments. This series is designed to provide control functions for very low dropout linear regulators. The UC3832 specifically offers enhanced versatility with 14 pins compared to the 8-pin UC3833, allowing access to additional control terminals like VADJ and E/A(+).

Replacement Considerations

Public confirmed substitute part numbers: UC3832N, UC3832DWG4, UC2832DWG4, UC1832DWG4.