UDQ2559LB

Power Distribution Switches, Load Drivers Overview

The UDQ2559LB is a protected quad power driver manufactured by Allegro MicroSystems, designed for driving inductive loads such as relays and solenoids. It features four low-side bipolar outputs capable of delivering up to 700mA each. The device operates within a supply voltage range of 4.75V to 5.25V and supports a maximum load voltage of 60V. It is housed in a 16-SOIC package with dimensions of 15.4mm x 7.5mm x 2.35mm. The component includes integrated fault protection mechanisms, specifically fixed current limiting and overtemperature shutdown, ensuring reliable operation in demanding environments.

Power Distribution Switches, Load Drivers Feature Summary

• Integrates four independent low-side bipolar drivers for simultaneous control of multiple inductive loads
• Includes built-in fixed current limiting to protect against output short circuits and overload conditions
• Features automatic thermal shutdown circuitry to prevent damage during excessive heat generation

Power Distribution Switches, Load Drivers Applications

• Relay driver circuits in industrial automation systems
• Solenoid actuation in automotive and appliance control modules
• General-purpose inductive load switching in embedded systems

Power Distribution Switches, Load Drivers Procurement Notes

Verify the specific suffix 'LB' to confirm the exact package variant and pin configuration. Confirm RoHS compliance status as some sources indicate non-compliance. Check part status as obsolete or active depending on the distributor. Ensure the operating temperature range meets your application requirements, typically -40°C to +85°C.

Power Distribution Switches, Load Drivers Selection Notes

Select this component when a compact solution for driving multiple small inductive loads is required. It is suitable for applications needing isolated control of relays or solenoids without external transistors. Consider the 16-SOIC package constraints for PCB layout. Evaluate the 700mA per channel limit against peak load currents to ensure adequate headroom.

Power Distribution Switches, Load Drivers Part Context

The UDQ2559LB belongs to Allegro's family of protected power drivers, often used in conjunction with other logic-level interface components. It serves as a bridge between low-voltage microcontrollers and higher-power inductive loads. Similar parts in the lineup may offer different output counts or voltage ratings, but this model specifically targets quad-channel applications in standard SOIC packaging.

Power Distribution Switches, Load Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB footprints if considering alternative manufacturers. Cross-reference electrical specifications such as output current and voltage ratings carefully before substitution.