UCC3837DTR

Overview

The UCC3837DTR is an 8-pin N-FET linear regulator controller manufactured by Texas Instruments in a SOIC-8 package. It operates within a temperature range of 0°C to 70°C and requires a VDD input between 2.0V and 15V. The device features a 1.5V reference voltage, a 100mV current sense comparator offset, and a typical supply current of 1.5mA at 5V. An internal charge pump generates gate drive voltage for external N-channel MOSFETs.

Feature Summary

• Integrates an onboard charge pump to generate the necessary gate drive voltage for external N-channel MOSFET pass transistors.
• Employs duty ratio mode overcurrent protection to manage peak transient loading while limiting average power dissipation during fault conditions.
• Supports extremely low dropout operation with output voltages adjustable down to 1.5V using minimal external components.

Applications

• Custom processor voltage regulation
• Bus termination voltage generation
• Logic level voltage supplies below 3V

Procurement Notes

Verify the specific suffix 'DTR' corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the component meets the RoHS directive standards applicable to your manufacturing region. Ensure the selected variant aligns with the specified industrial operating temperature range of 0°C to 70°C for your intended deployment environment.

Selection Notes

Select this controller when designing high-efficiency linear regulators requiring an external N-channel MOSFET pass element. It is suitable for applications demanding precise current limit settings and low dropout performance. Consider the internal charge pump impedance and external capacitor requirements when optimizing transient response and startup times for the target load profile.

Part Context

This component belongs to the UCC3837 family of linear regulator controllers designed for low dropout applications. It serves as a versatile solution for generating custom logic-level voltages where standard three-terminal regulators are insufficient. The device integrates essential control loops, including error amplification and current sensing, into a compact eight-pin surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers: UCC2837DTR, UCC1837DTR.