ST890DTR

Overview

The ST890DTR 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, making it suitable for both 3 V and 5 V systems. The device features internal current limiting circuitry to protect the input supply against overload conditions. Thermal overload protection limits power dissipation and junction temperatures to ensure reliability. The maximum current limit is 1.2 A, which can be programmed using a resistor connected from the SET pin to ground. The part is available in SO-8 and DFN8L (3 x 3 mm) packages.

Feature Summary

• Operates within a 2.7 V to 5.5 V input range
• Features programmable current limit up to 1.2 A
• Includes thermal shutdown protection
• Provides an active-low FAULT indicator output

Applications

• High-side load switching in 3 V systems
• High-side load switching in 5 V systems
• Overload protection for input supplies

Procurement Notes

Verify the specific package variant when ordering, as the ST890 is available in both SO-8 and DFN8L (3 x 3 mm) configurations. Confirm that the suffix 'DTR' corresponds to the intended tape-and-reel packaging format if applicable. Ensure the design accounts for the external resistor required to program the current limit between the SET pin and ground. Check for compatibility with the 2.7 V to 5.5 V operating voltage range of the target application.

Selection Notes

Select this component for applications requiring a P-channel high-side switch with integrated protection. It is suitable for systems operating at 3 V or 5 V where thermal and current overload protection are necessary. Consider the need for an external resistor to set the current limit. Evaluate the available package options, specifically SO-8 and DFN8L, based on space constraints and thermal requirements. Ensure the application benefits from the active-low fault indication feature.

Part Context

The ST890 belongs to a family of low-voltage power switches from STMicroelectronics. These devices are engineered for efficient load management in portable and industrial electronics. The series provides reliable switching capabilities with built-in safeguards against electrical faults. The ST890DTR specifically denotes a variant within this lineup, focusing on high-side control for standard logic-level voltage domains.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.