STMPS2171TTR

Overview

The STMPS2171TTR is a single-channel high-side power distribution switch from STMicroelectronics, designed for applications involving heavy capacitive loads and short circuits. It incorporates an N-channel MOSFET with a typical on-resistance of 110 mΩ. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports a continuous output current of 1 A. It features fixed current limiting at 1.5 A, thermal shutdown protection, reverse current protection, and undervoltage lockout (UVLO). The component is available in an 8-MSOP package and functions across an ambient temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-side N-channel MOSFET switch controlled by a logic enable input for efficient power distribution.
• Provides comprehensive fault protection including fixed current limiting, thermal shutdown with automatic recovery, and reverse current prevention.
• Features CMOS and TTL compatible inputs with undervoltage lockout to ensure safe operation during low voltage conditions.

Applications

• Power distribution systems requiring protection against heavy capacitive loads
• Short-circuit protection in electronic circuit boards
• Load switching in industrial and consumer electronics

Procurement Notes

Verify the specific suffix TTR corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the 8-MSOP package dimensions align with the target PCB footprint. Ensure the operating temperature range meets the environmental specifications of the final application. Cross-reference the UL file number E354278 if regulatory compliance documentation is necessary for the end product certification.

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 integrated overcurrent and thermal protection without external sensing components. Consider the 110 mΩ on-resistance for efficiency calculations. Verify compatibility with the system's logic voltage levels, as the device supports both CMOS and TTL inputs. Ensure the 2.7 V to 5.5 V supply range matches the available power rails.

Part Context

The STMPS2171 belongs to the STMPS21 series of power distribution switches from STMicroelectronics. This family includes variants such as the STMPS2141, STMPS2151, and STMPS2161, which offer different current ratings. These devices are engineered for robust performance in environments prone to electrical faults, providing reliable load management through integrated safety features.

Replacement Considerations

Check for direct pin-compatible alternatives within the STMPS21 series, such as the STMPS2171STR or STMPS2171MTR, which may differ only in packaging type. Verify that any substitute maintains the same 1 A current rating and 8-MSOP package form factor to ensure mechanical and electrical compatibility.