UC3832DWG4

Overview

The UC3832DWG4 is a precision low dropout linear controller manufactured by Texas Instruments, housed in a 16-pin SOIC (DW) package. It operates within an input voltage range of 4.5 V to 36 V and includes a 2 V ±1% reference. The device features a high-current driver capable of sourcing or sinking up to 100 mA, supporting both NPN and PNP external pass transistors. Electrical characteristics specify a supply current of 6.5 mA to 15 mA depending on the input voltage. The component incorporates under-voltage lockout with a threshold between 3.6 V and 4.5 V, thermal shutdown at 160 °C, and duty-ratio current limiting.

Feature Summary

• Innovative duty-ratio current limiting technique that provides peak load capability while limiting average power dissipation during fault conditions.
• High-current driver with separate source and sink outputs, allowing flexibility in selecting either NPN or PNP external pass transistors.
• Integrated logic-level disable input for system control and protection functionality.
• Includes under-voltage lockout and thermal shutdown mechanisms to ensure safe operation.

Applications

• Design of very low dropout linear regulators
• Precision linear regulator systems requiring adjustable current limit
• Power supplies needing short circuit protection without extra heat sinking

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS status as per the manufacturer's packaging addendum. Confirm the SOIC-16 package dimensions match your PCB footprint requirements. Ensure the commercial temperature range (0°C to 70°C) aligns with your application environment, as industrial variants may require different part numbers.

Selection Notes

Select this component when designing low dropout regulators that require precise current limiting and high drive capability. The UC3832 series offers additional versatility compared to the UC3833, including accessible error amplifier inputs and programmable driver current limits. Consider the 16-pin SOIC package for surface mount applications requiring robust thermal performance and ease of assembly.

Part Context

The UC3832 is part of the UCx832/UCx833 family of precision low dropout linear controllers from Texas Instruments. This family shares core functionalities such as the 2V reference and error amplifier but differs in pin count and feature availability. The UC3832 specifically provides enhanced control options like a logic-level disable input and adjustable current limit via the VADJ pin, distinguishing it from the simpler UC3833 variant.

Replacement Considerations

Public confirmed substitute part numbers include UC3832DW and UC2832DW. Verify compatibility regarding operating temperature ranges and package specifications before substitution.