UC2834QTR

Overview

The UC2834QTR is a high-efficiency linear regulator controller from Texas Instruments, designed for low input-output differential applications. It operates within a supply voltage range of 5V to 35V and supports an operating temperature range of -40°C to +85°C. The device features dual precision references (+1.5V and -2.0V) and provides 200mA sink or source drive outputs to facilitate high output current designs using external pass devices. It includes an adjustable low threshold current sense amplifier and fault monitoring circuitry that detects under-voltage and over-voltage conditions with programmable delay.

Feature Summary

• Supports both positive and negative regulator designs using integrated precision references
• Includes fault monitoring circuitry with programmable delay for transient rejection
• Features an over-voltage latch with crowbar drive output for system protection
• Provides adjustable current limiting via a dedicated sense amplifier

Applications

• Low input-output differential linear regulator design
• High output current power supply implementations
• Systems requiring under-voltage and over-voltage fault alerting
• Positive or negative fixed voltage regulation architectures

Procurement Notes

Verify the specific package type associated with the QTR suffix against official documentation, as datasheets primarily list DW (SOIC-16) and J (CDIP-16) packages. Confirm RoHS compliance status and moisture sensitivity level ratings prior to procurement. Ensure the ordering part number matches the required temperature grade and material specifications defined in the manufacturer's packaging addendum.

Selection Notes

Select this component when designing regulators with minimal input-to-output voltage differentials. The internal thermal shutdown function protects against excessive power dissipation. Consider the 200mA driver capability for sizing external pass transistors. Verify that the application requires the specific fault alert and crowbar functionalities provided by the integrated monitoring circuits.

Part Context

The UC2834 belongs to the UC1834 family of high-efficiency linear regulator controllers. This family shares core architectural features but differs in temperature ranges and qualification levels. The UC2834 variant specifically targets commercial industrial environments with a specified operating range of -40°C to +85°C, distinguishing it from the military UC1834 and commercial UC3834 counterparts.

Replacement Considerations

UC2834DW