UC2834DWTRG4

Overview

The UC2834DWTRG4 is a high-efficiency linear regulator controller from Texas Instruments, housed in a 16-pin SOIC package. It operates within an ambient temperature range of -40°C to +85°C and supports both positive and negative regulator designs. The device features adjustable low-threshold current sense amplifiers and under/over-voltage fault alerts with programmable delay. It includes a 100mA crowbar drive output for over-voltage protection and internal thermal shutdown. Standby supply current ranges from 5.5mA to 10mA, while the driver section provides up to 350mA maximum output current.

Feature Summary

• Optimized for low input-output differential linear regulators using external pass devices
• Integrated fault monitoring circuitry with programmable transient rejection delay
• Dual precision references enabling implementation of either positive or negative polarity regulators
• Internal thermal shutdown function protects against excessive power dissipation

Applications

• Low input-output differential linear regulator design
• Positive or negative regulator implementations requiring high output currents
• Systems requiring under and over-voltage fault alerting with programmable delays
• Applications necessitating over-voltage latch functionality with crowbar drive outputs

Procurement Notes

Verify that the ordering suffix G4 confirms lead-free status and RoHS compliance as specified by Texas Instruments. Confirm the DW package designation matches the required 16-pin SOIC form factor. Ensure the operating temperature range aligns with the -40°C to +85°C specification for the UC2834 variant. Cross-reference the datasheet revision date to ensure all electrical characteristics are current.

Selection Notes

Select this component when designing linear regulators with minimal voltage drop requirements at high loads. The adjustable current sense threshold allows customization for specific protection limits. Consider the dual reference outputs if precise biasing for both polarities is needed. Evaluate the fault delay settings to balance transient immunity against rapid fault response times.

Part Context

This part belongs to the UC1834 family of integrated circuits designed for high-efficiency linear regulation. The UC2834 specifically targets commercial temperature ranges compared to the military-grade UC1834 and industrial UC3834 variants. All members share identical pinouts and core functionalities, differing primarily in temperature specifications and qualification standards.

Replacement Considerations

UC2834DW serves as a direct non-tape-and-reel equivalent. UC1834DW and UC3834DW offer identical functionality across different temperature grades.