STMicroelectronics STMPS2171MTR

Overview

STMPS2171MTR from STMicroelectronics is a 1000 mA rated, active-high enable, high-side N-channel MOSFET power switch in SOT23-5L package, featuring thermal and short-circuit protection with open-drain FAULT output, 2.7–5.5 V operating range, and 12 µA standby current. It delivers robust power distribution for capacitive-load hot-swap applications in USB peripherals, industrial I/O modules, and embedded system rails.

For engineers reviewing the STMPS2171MTR datasheet, STMPS2171MTR pinout, STMPS2171MTR application, or STMPS2171MTR equivalent, key selection criteria include its 1000 mA continuous current rating, active-high EN logic compatibility, fault-blanking timing, R_ON of 135 mΩ at 5 V, and thermal shutdown behavior at 135 °C junction temperature.

Technical Context

The STMPS2171MTR integrates a low-R_ON (135 mΩ typ. at 5 V) N-channel high-side MOSFET with integrated current-limiting and thermal foldback. Its protection architecture combines 10 ms fault blanking for transient overloads, immediate FAULT assertion for UVLO and die overtemperature events, and reverse-current blocking when disabled.

Control logic accepts CMOS/TTL-compatible active-high EN input; FAULT is an open-drain output asserting low after blanking timeout during overcurrent or immediately during undervoltage or overheating. The device operates across –40 to +85 °C ambient and supports stable switching into heavy capacitive loads without external components.

Key Specifications

Pinout & Package

SOT23-5L package: 5-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.45 mm height, 191 °C/W thermal resistance (junction-to-ambient).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Compared with TPS2051BDBVR and AP22653AW5-7, the STMPS2171MTR uniquely balances 1000 mA capacity, integrated FAULT signaling with blanking, UL recognition, and SOT23-5L footprint-making it optimal for safety-aware, hot-swap-capable industrial and medical subsystems.

Availability

STMPS2171MTR is available at Aetrix Electronics and suitable for USB peripheral power management, industrial digital I/O modules, embedded system power sequencing, and portable medical device subsystems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STMPS2171MTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in power management, microcontrollers, and analog ICs, with strong focus on industrial, automotive, and embedded applications.

The STMPS21xx family is designed specifically for robust, single-channel power distribution in environments prone to capacitive inrush and short-circuit faults - targeting space-constrained, safety-conscious systems.

FAQ

What is the maximum allowable output voltage relative to input?

The STMPS2171MTR specifies V_OUT ≤ V_IN + 0.3 V under all conditions. Exceeding this violates absolute maximum ratings and risks reverse conduction or latch-up. When disabled, the device blocks reverse current up to this limit; however, applying V_OUT > V_IN while enabled is strictly prohibited and may cause permanent damage.

How does fault blanking interact with thermal shutdown?

Fault blanking applies only to overcurrent events - it delays FAULT assertion for up to 10 ms. Thermal shutdown and UVLO faults bypass blanking entirely and assert FAULT immediately upon detection. This ensures rapid response to potentially destructive conditions while tolerating benign inrush transients.

Can the FAULT pin drive an LED directly?

Yes - the FAULT pin is open-drain with 20 mA sink capability. A typical configuration uses a 1–10 kΩ pull-up to V_CC and a series resistor (e.g., 1 kΩ) to an LED anode, with cathode grounded. Ensure total sink current stays within datasheet limits and that pull-up voltage matches system logic levels.

Is the SOT23-5L package RoHS and REACH compliant?

Yes - STMPS2171MTR is manufactured per STMicroelectronics' standard environmental compliance program, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, including SVHC screening. Full compliance documentation is available via ST's Quality & Reliability portal using order code STMPS2171MTR.