NUD3112LT1G

Overview

The NUD3112LT1G is an integrated inductive load driver manufactured by onsemi, designed for switching applications. It features a single N-channel MOSFET switch housed in a compact SOT-23 surface-mount package. The device operates with a supply voltage range of 4.5V to 28V and accepts standard logic-level inputs from microcontrollers or logic gates. Key internal components include the power switch, ESD protection diodes, and a Zener clamp for overvoltage suppression. This integration eliminates the need for external freewheeling diodes, simplifying circuit design while providing robust protection for connected loads.

Feature Summary

• Integrates a high-side N-channel MOSFET switch with built-in ESD protection and Zener clamping for inductive load management
• Accepts direct logic-level input signals, enabling straightforward interfacing with microcontrollers and digital logic gates
• Eliminates the requirement for external freewheeling diodes through internal integrated protection circuitry

Applications

• Switching relays and solenoids
• Driving electromagnetic switches
• Controlling incandescent lamps
• Operating small DC motors

Procurement Notes

Verify the specific ordering suffix 'LT1G' to ensure compliance with lead-free and halogen-free manufacturing standards as defined by onsemi. Confirm that the SOT-23 package variant matches the required PCB footprint and thermal dissipation capabilities for the target application environment. Cross-reference the datasheet revision date to ensure alignment with current design specifications.

Selection Notes

Select this component when space constraints necessitate a highly integrated solution for low-power inductive loads. It is suitable for systems requiring direct logic control without additional discrete protection components. Consider the 28V maximum supply limit and the specific current handling requirements of the load to ensure operation within safe limits compared to higher-capacity alternatives in the NUD31xx series.

Part Context

This part belongs to the NUD31xx family of integrated relay and inductive load drivers from onsemi. These devices are engineered to replace complex discrete designs consisting of separate MOSFETs, diodes, and resistors. The family offers various configurations tailored for different voltage levels and load currents, providing a standardized approach to managing inductive kickback and simplifying board layout for consumer and industrial electronics.

Replacement Considerations

NUD3105LT1G serves as a functional substitute within the same integrated driver family. Verify pin compatibility and electrical parameter alignment before implementation.