STMPS2161STR

Overview

The STMPS2161STR is an enhanced single-channel power distribution switch from STMicroelectronics, designed for applications involving heavy capacitive loads and short circuits. It incorporates a 90 mΩ N-channel MOSFET high-side power switch controlled by a logic enable input. The device operates within a voltage range of 2.7 V to 5.5 V and supports a continuous current of 1 A. It features built-in protection against transient events, overcurrent, thermal overload, and undervoltage conditions.

Feature Summary

• Integrates a 90 mΩ high-side N-channel MOSFET switch for efficient power distribution.
• Provides automatic current limiting in constant current mode during overloads or short circuits.
• Includes thermal protection that shuts off the switch upon excessive junction temperature rise with automatic recovery upon cooling.
• Features internal circuitry ensuring the switch remains off until valid input voltage is present.

Applications

• Power distribution systems requiring protection against heavy capacitive loads
• Applications prone to short-circuit conditions
• High-side switching control via logic inputs

Procurement Notes

Verify the specific suffix 'STR' corresponds to the SOT-23 package and tape-and-reel configuration as indicated in component databases. Confirm RoHS compliance status and ensure the operating temperature range of -40 °C to 85 °C meets system requirements. Cross-reference the datasheet for exact pinout and electrical characteristics to avoid substitution errors with similar series members like STMPS2141 or STMPS2151.

Selection Notes

Select this component when a single-channel high-side switch with integrated fault protection is required. It is suitable for designs needing 1 A continuous current capability and low on-resistance. Consider the SOT-23 package size constraints and the 2.7 V to 5.5 V supply voltage range. Ensure the application benefits from the automatic thermal shutdown and recovery features for robustness against overload conditions.

Part Context

The STMPS2161STR belongs to the STMPS21xx series of enhanced power distribution switches from STMicroelectronics. This family includes variants such as STMPS2141, STMPS2151, and STMPS2171, which share similar architectural principles but may differ in current ratings or specific protection thresholds. The series is engineered for reliable power management in environments with potential load anomalies.

Replacement Considerations

Direct substitutes within the same series include STMPS2141STR, STMPS2151STR, and STMPS2171STR. Verify if the alternative part number offers compatible current limits and on-resistance values. Ensure the replacement maintains the same SOT-23 package and pinout configuration to facilitate drop-in integration without PCB redesign.