STMPS2171STR

Overview

The STMPS2171STR is a single-channel high-side power distribution switch from the STMPS21 series, manufactured by STMicroelectronics. It integrates a 90 mΩ N-channel MOSFET for efficient power switching in applications prone to heavy capacitive loads and short circuits. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports a continuous output current of 1000 mA. It features a SOT-23 surface-mount package with five pins. Key electrical parameters include a maximum on-resistance of 140 mΩ and an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates a low on-resistance N-channel MOSFET for efficient high-side power distribution.
• Provides automatic thermal shutdown protection that resumes operation upon cooling.
• Limits output current to safe levels during overloads or short-circuit conditions.
• Includes undervoltage lockout and reverse current protection mechanisms.

Applications

• Power management systems requiring robust load switching
• Applications involving heavy capacitive loads
• Circuits susceptible to short-circuit events

Procurement Notes

Verify the specific suffix STR indicates the SOT-23-5 packaging configuration when sourcing. Confirm compliance with UL recognition standards if required for end-product certification. Ensure the selected variant matches the required continuous current rating and thermal performance specifications for the intended operational environment.

Selection Notes

Select this component for designs needing a single-channel high-side switch with integrated fault protection. Consider the 1000 mA continuous current capability and low on-resistance for efficiency. Evaluate the SOT-23 package size against available PCB real estate. Verify compatibility with CMOS or TTL logic inputs for control signals.

Part Context

This part belongs to the STMPS21 family of enhanced single-channel power switches. The family includes variants like STMPS2141, STMPS2151, and STMPS2161, differentiated primarily by current ratings and package types. The STMPS2171 specifically targets higher current applications compared to lower-rated siblings while maintaining similar protection features.

Replacement Considerations

STMPS2171MTR (SOIC-8 package)

FAQ

How does the device handle short-circuit conditions?

The device limits the output current to a safe level by switching into a constant current mode when a short circuit or overload is detected.

Is the thermal shutdown recovery manual or automatic?

Recovery from thermal shutdown is automatic once the device junction temperature has cooled sufficiently.