UC3832DWTR

Overview

The UC3832DWTR is a precision low dropout linear regulator controller manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 36 V and features an integrated 1% reference voltage. The device includes an error amplifier, under-voltage lockout (UVLO), and thermal shutdown protection. It provides a high-current driver capable of sourcing or sinking up to 100 mA, supporting 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 a 16-pin SOIC (DW) package.

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.
• High current driver with separate source and sink outputs, allowing flexibility in using either NPN or PNP external pass transistors.
• Integrated precision 1% reference voltage and programmable over-current sense threshold accurate to 5%.
• Built-in safety mechanisms including under-voltage lockout (UVLO) and thermal shutdown to ensure safe operation.

Applications

• Designing very low dropout linear regulators
• Power supplies requiring peak load capability during fault conditions
• Applications utilizing NPN or PNP external pass transistors

Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging format, as indicated by the TR designation. Ensure the selected variant matches the required commercial temperature range specifications. Cross-reference the manufacturer part number with official documentation to validate authenticity and compliance with RoHS standards before procurement.

Selection Notes

Select this controller when designing low dropout linear regulators that require precise current limiting and high drive capability. Consider the UC3832 series for its ability to handle peak loads via duty-ratio control. Evaluate the need for external NPN or PNP pass transistors based on the application's voltage and current requirements. Verify compatibility with the 16-pin SOIC footprint.

Part Context

The UC3832 belongs to the UCx832/3 family of precision low dropout linear controllers from Texas Instruments. This family integrates all necessary control functions for regulator design, including error amplifiers and UVLO. The UC3832 specifically offers enhanced versatility compared to the 8-pin UC3833, providing additional pins for adjustable current limit and logic-level disable inputs.

Replacement Considerations

UC3833DWTR