ST890BDR

Power Distribution Switches, Load Drivers Overview

The ST890BDR is a low-voltage P-channel MOSFET power switch designed for high-side load switching applications. It operates with input voltages ranging from 2.7 V to 5.5 V, supporting both 3 V and 5 V systems. The device features an internal current limiting circuitry that protects the input supply against overload, with a maximum current limit of 1.2 A. This limit is programmable via a resistor connected from the SET pin to ground. Thermal overload protection limits power dissipation and junction temperatures. The switch offers a typical on-resistance of 90 mΩ and includes an active-low FAULT indicator output.

Power Distribution Switches, Load Drivers Feature Summary

• Programmable current limiting up to 1.2 A using an external resistor
• Integrated thermal shutdown protection to limit junction temperature
• Active-low FAULT indicator output for status monitoring
• Low quiescent current operation

Power Distribution Switches, Load Drivers Applications

• High-side load switching in 3 V and 5 V systems
• Input supply overload protection
• Power distribution in portable electronics

Power Distribution Switches, Load Drivers Procurement Notes

Verify the specific suffix 'BDR' corresponds to the tape-and-reel packaging configuration required for your assembly line. Confirm the operating temperature range of -40°C to +85°C aligns with your environmental specifications. Ensure the 8-SOIC package dimensions fit your PCB footprint constraints. Check RoHS compliance status if restricted substances are a concern for your target market.

Power Distribution Switches, Load Drivers Selection Notes

Select this component when a high-side switch with programmable current limiting is required for 3 V or 5 V loads. The ST890BDR is suitable for applications needing thermal protection and fault indication. Consider the 90 mΩ typical on-resistance for efficiency calculations. Verify that the external resistor value correctly sets the desired current limit below the 1.2 A maximum threshold.

Power Distribution Switches, Load Drivers Part Context

The ST890BDR belongs to the ST890 family of intelligent power switches manufactured by STMicroelectronics. These devices utilize BCD technology to provide robust protection features in a compact surface-mount package. The family is designed for general-purpose load switching where overcurrent and overtemperature conditions must be managed efficiently within low-voltage digital systems.

Power Distribution Switches, Load Drivers Replacement Considerations

The ST890CDR is listed as a parameter-equivalent substitute. Verify compatibility regarding the SO-8 package and electrical characteristics before substitution.

Power Distribution Switches, Load Drivers FAQ

How is the current limit adjusted?

The current limit is programmed by connecting a resistor between the SET pin and ground.

What protection features are included?

The device includes programmable current limiting and thermal shutdown protection.