UC2835N

Overview

The UC2835N is a linear regulator controller IC from the UC2835/6 family, designed for low dropout applications. It features an internal 250mA output driver and a precision reference. The device provides accurate 2.5A current limiting with foldback protection. It includes under-voltage lockout, thermal shutdown, and reverse voltage protection. Operating temperature range is -25°C to +85°C. Input supply voltage ranges from 5.2V to 35V. Driver output current capability is up to 600mA. Supply current is typically 4.0mA at 6V input.

Feature Summary

• Optimized for high current, low dropout linear regulators using external pass elements
• Includes internal current sense resistor with foldback current limiting
• Features remote sense capability for improved load regulation
• Provides under-voltage lockout and thermal shutdown protection

Applications

• Low cost, low dropout linear regulator designs
• High efficiency regulator controllers
• Applications requiring precise current limiting and foldback protection

Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the PDIP-8 package when sourcing. Confirm the operating temperature range of -25°C to +85°C matches your environmental requirements. Check the latest datasheet for any updates on lead finish or packaging details. Ensure compatibility with external pass transistors for the intended current levels.

Selection Notes

Select this component for fixed 5V output linear regulator designs. It requires only an external pass element, output capacitor, and compensation capacitor. Consider the UC2836 if an adjustable output voltage between 2.5V and 35V is needed. Evaluate the 2.5A peak current limit against your maximum load requirements.

Part Context

The UC2835N belongs to the UC1835/6, UC2835/6, and UC3835/6 families of linear controllers. These devices are optimized for low dropout performance. The UC2835 variant specifically supports an extended industrial temperature range compared to the UC3835 commercial grade. It shares functional similarities with the UC2836 but offers a fixed 5V output.

Replacement Considerations

UC2836D (SOIC-8 package, adjustable output)

FAQ

What is the maximum output current capability of the UC2835N?

The device contains a 250mA output driver, but with an external pass element, it can support peak output currents up to 2.5A with foldback protection.

Does the UC2835N have an adjustable output voltage?

No, the UC2835N is the fixed 5V version. The UC2836 is the adjustable version that allows setting output voltages from 2.5V to 35V.