UC3836D

Overview

The UC3836D is a high-efficiency linear regulator controller designed for low dropout applications. It operates with an input voltage range of 6V to 40V and supports adjustable output voltages from 2.5V to 35V. The device features a 250mA internal driver capable of sourcing or sinking current, with an external pass element enabling peak output currents up to 2.5A. It includes built-in under-voltage lockout, thermal shutdown, and reverse voltage protection. The component is housed in an 8-pin SOIC package and functions within a temperature range of 0°C to +70°C.

Feature Summary

• Integrated foldback current limiting protects against short circuits by reducing current below 0.5A at zero output voltage.
• Internal current sense resistor simplifies design by eliminating the need for external sensing components.
• Remote sense capability allows for improved load regulation accuracy across varying cable resistances.
• External shutdown pin provides precise control over device operation states.

Applications

• Designing low-cost, low dropout linear regulators
• High current power supply architectures requiring external pass elements
• Systems necessitating remote voltage sensing for regulation stability

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature grade. Ensure the procurement matches the catalog designation for commercial grade devices. Confirm RoHS compliance status through official manufacturer documentation prior to finalizing orders.

Selection Notes

Select this controller when designing linear regulators that require adjustable output voltages between 2.5V and 35V. It is suitable for applications needing integrated protection features such as thermal shutdown and under-voltage lockout. Consider the 8-pin SOIC package constraints for surface mount implementations.

Part Context

The UC3836D belongs to the UC1835/6 family of linear controllers optimized for low dropout performance. It shares architectural similarities with the UC2836D but differs in operating temperature specifications. The device utilizes a precision reference and high-gain error amplifier to maintain stable regulation.

Replacement Considerations

UC2836D serves as a verified alternative with extended temperature capabilities. UC1836D offers military-grade qualification. Verify pin compatibility and thermal characteristics before substitution.