UC2834QG3

Overview

The UC2834QG3 is a high-efficiency linear regulator controller from the UC1834 family, housed in a 20-pin PLCC package. It supports both positive and negative regulator designs with an input supply voltage range of 5V to 35V. The device features adjustable low-threshold current sensing, under/over-voltage fault alerts with programmable delay, and a 100mA crowbar drive output for over-voltage protection. Operating temperature ranges from -40°C to +85°C.

Feature Summary

• Supports both positive and negative linear regulator topologies using external pass devices
• Includes adjustable low-threshold current sense amplifier for precise load limiting
• Provides under-voltage and over-voltage fault monitoring with user-defined transient rejection delays
• Features a 100mA crowbar gate output and latch functionality for system shutdown during faults

Applications

• High-current positive linear power supplies
• Negative polarity linear power regulation systems
• Power management circuits requiring over-voltage crowbar protection
• Systems needing programmable fault alert and delay timing

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead finish specifications against the latest datasheet revision. Ensure the 20-PLCC package matches design requirements. Check for obsolescence notices or lifecycle changes prior to finalizing procurement orders.

Selection Notes

Select this controller when designing regulators requiring differential voltages below 0.5V at high loads. Consider the 200mA driver capability for external pass transistor control. Evaluate the need for programmable fault delays and crowbar outputs. Verify thermal management requirements for the PLCC package within the specified operating temperature range.

Part Context

Part of the UC1834/UC2834/UC3834 family optimized for low input-output differential linear regulators. The UC2834 variant specifically targets industrial temperature ranges (-40°C to +85°C). It utilizes a high-gain error amplifier and precision references to facilitate stable operation with external pass devices in demanding power applications.

Replacement Considerations

No officially confirmed substitute part numbers are documented in the provided source material.