STMPS2171MTR

Overview

The STMPS2171MTR is an enhanced single-channel high-side power distribution switch from STMicroelectronics, designed for applications involving heavy capacitive loads and short-circuits. It incorporates a 90 mΩ N-channel MOSFET with a continuous output current of 1 A and a fixed current limit of 1.5 A. The device operates within a supply voltage range of 2.7 V to 5.5 V and features a maximum on-resistance of 130 mΩ. It supports CMOS and TTL compatible enable inputs, includes undervoltage lockout (UVLO), and provides thermal and short-circuit protection with overcurrent logic output.

Feature Summary

• Integrates a 90 mΩ high-side N-channel MOSFET for efficient power distribution.
• Provides comprehensive protection against thermal overload, short-circuits, and reverse current.
• Features automatic recovery from thermal shutdown and fault blanking capabilities.
• Includes undervoltage lockout (UVLO) and a low standby supply current of 12 μA.

Applications

• Power distribution in automotive electronics
• Industrial load switching systems
• Consumer appliance control circuits

Procurement Notes

Verify the specific suffix 'MTR' corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the component meets the necessary industrial temperature specifications and RoHS compliance standards for your target application environment. Cross-reference the datasheet revision to ensure all electrical parameters align with your design requirements before finalizing procurement.

Selection Notes

Select this component when a single-channel high-side switch with 1 A continuous current capability is required. It is suitable for designs needing robust protection against short-circuits and heavy capacitive loads. Consider the SO-8 package for surface mount applications where space efficiency and thermal performance are critical factors in the system architecture.

Part Context

The STMPS2171MTR belongs to the STMPS21x1 family of enhanced single-channel power switches. This series is engineered to handle demanding conditions such as short-circuits and large capacitive loads. The family shares common protection features like thermal shutdown and current limiting, ensuring reliable operation across various industrial and automotive power distribution scenarios.

Replacement Considerations

Compatible substitutes within the same family include the STMPS2141, STMPS2151, and STMPS2161. Verify that the alternative part number matches the required current rating and package type. Ensure that the pinout and electrical characteristics are identical to maintain circuit compatibility without redesign.

FAQ

How does the STMPS2171MTR handle short-circuit conditions?

The device limits the output current to a safe level by switching into a constant current mode. If the junction temperature rises due to continuous overload, the thermal protection circuit shuts the switch off automatically until it cools sufficiently.

What is the maximum standby supply current?

The maximum standby supply current is 12 μA, which helps minimize power consumption when the switch is not actively driving a load.