ULQ2003ADRG4

Overview

The ULQ2003ADRG4 is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven NPN Darlington pairs within a single SOIC-16 surface-mount package. Each channel provides a collector-emax voltage of 50 V and supports a maximum DC collector current of 500 mA. The device includes built-in clamp diodes connected to the common pin for inductive load protection. It operates across an extended temperature range from -40°C to +85°C. The 'G4' suffix indicates compliance with RoHS standards and lead-free manufacturing processes.

Feature Summary

• Integrates seven independent NPN Darlington transistor channels for multi-channel switching applications
• Includes internal clamp diodes on each output to suppress reverse voltage spikes from inductive loads
• Designed for direct interface with TTL, CMOS, or MOS logic families due to high input impedance

Applications

• Driving relays and solenoids in industrial control systems
• Switching stepper motors and other inductive actuators
• General-purpose high-side switching for lamps and heaters

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and environmental compliance. Confirm that the component meets the required RoHS directives for your target market. Ensure the selected variant matches the necessary operating temperature range and packaging format for your assembly process.

Selection Notes

Select this component when multiple independent high-current switches are required in a compact surface-mount footprint. Verify that the 500 mA per channel limit accommodates the peak current requirements of the connected loads. Consider the thermal dissipation capabilities of the SOIC-16 package relative to the expected power loss during operation.

Part Context

This part belongs to the ULQ2003A family of Darlington arrays, which are designed for robust switching of inductive loads. The ULQ2003ADRG4 specifically denotes the tape-and-reel version of the standard ULQ2003AD, facilitating automated pick-and-place manufacturing while maintaining identical electrical characteristics to the tube-packaged equivalent.

Replacement Considerations

Publicly confirmed substitute part numbers for the ULQ2003ADRG4 were not identified in the provided source material.