UCC2837DTR

Overview

The UCC2837DTR is a positive linear series pass voltage regulator from the UCC283 family, fabricated using BiCMOS technology. It delivers up to 3 A of load current with a typical dropout voltage of 0.45 V at full load and 50 mV at 10 mA. The device features low quiescent current under 650 µA irrespective of load and includes reverse voltage sensing to prevent reverse current flow. It offers adjustable output voltage via an external resistor divider on the ADJ pin and incorporates logic shutdown capability through the CT pin.

Feature Summary

• Internal charge-pump drives N-channel MOSFET for low dropout performance
• Pulsed short-circuit protection reduces power dissipation during faults
• Thermal overload protection shuts down device above junction temperature limit
• Low reverse leakage current prevents back-feeding when input is removed

Applications

• Low-dropout regulation for high-current digital loads
• Battery-powered systems requiring efficient voltage conversion
• Power supplies with strict thermal management constraints
• Applications requiring remote voltage sensing capabilities

Procurement Notes

Verify the exact ordering suffix matches the required package type and temperature range. Confirm RoHS compliance status and moisture sensitivity level before procurement. Ensure the supplier provides valid traceability documentation. Check for any specific handling requirements related to electrostatic discharge protection during storage and assembly processes.

Selection Notes

Select this component for applications needing high current capability with minimal voltage drop. Consider the thermal resistance characteristics when designing heat sinking solutions. Evaluate the maximum output capacitance limits to ensure stable startup behavior. Verify that the input voltage range accommodates the required dropout voltage across all operating conditions.

Part Context

This part belongs to the UCC283 family of precision positive linear regulators. It shares functional similarities with the UC283 and UCC383 series but differs in temperature specifications and package options. The family is designed for low-power, high-efficiency linear regulation tasks where standard LDOs may not meet dropout or current requirements.

Replacement Considerations

UCC283TD-3, UCC283TD-5, UCC283TD-ADJ, UCC383TD-3, UCC383TD-5, UCC383TD-ADJ