STMicroelectronics STMPS2141MTR

Overview

STMPS2141MTR from STMicroelectronics is a 500 mA rated, active-low 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 operation, and 12 µA standby current. It delivers robust power distribution for capacitive-load hot-swap applications in USB peripherals and industrial I/O modules.

For engineers reviewing the STMPS2141MTR datasheet, STMPS2141MTR pinout, STMPS2141MTR application, or STMPS2141MTR equivalent, this page provides verified specifications, real-world use cases, validated alternatives, and supply-chain support for production-grade design-in.

Technical Context

The STMPS2141MTR integrates a 135 mΩ (typ.) high-side N-MOSFET with integrated current-limiting logic that activates at ~600 mA (120% of 500 mA rating), entering constant-current mode during overloads. Its fault management includes 10 ms blanking for transient short-circuits and immediate FAULT assertion for UVLO or die overtemperature (>135 °C).

It implements undervoltage lockout (UVLO) with ~2.3 V turn-on threshold and 150 mV hysteresis, reverse current blocking when disabled, and CMOS/TTL-compatible EN input. The FAULT pin is open-drain, requiring external pull-up for system-level fault reporting.

Key Specifications

Pinout & Package

SOT23-5L package: 5-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.45 mm height, thermal resistance 191 °C/W (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 TCK107AG and TPS22965DSGR, the STMPS2141MTR offers balanced trade-offs: lower R_ON than Toshiba's part with built-in FAULT reporting, and smaller SOT23-5L footprint versus TI's SO-8, making it optimal for space-constrained industrial and USB designs requiring diagnostic visibility.

Availability

STMPS2141MTR is available at Aetrix Electronics and suitable for USB peripheral power management, industrial I/O module protection, and embedded system power sequencing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STMPS2141MTR 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 manufacturing ISO/TS 16949-certified facilities and broad automotive qualification coverage.

The STMPS series targets robust, cost-effective power distribution in harsh environments; designed specifically for hot-swap-capable, fault-resilient applications where reliability outweighs ultra-low R_ON optimization.

FAQ

What is the maximum allowable ambient temperature for continuous 500 mA operation in SOT23-5L?

At 500 mA and 5 V input, the STMPS2141MTR dissipates 33.8 mW. With SOT23-5L thermal resistance of 191 °C/W, junction-to-ambient rise is 6.5 °C. Given a 125 °C max junction temperature, the maximum ambient temperature is 118.5 °C - well above the rated −40 to +85 °C operating range, confirming ample thermal margin under nominal conditions.

Does the FAULT pin require an external pull-up resistor, and what value is recommended?

Yes, the FAULT pin is open-drain and requires an external pull-up. STMicroelectronics recommends 10 kΩ to V_CC (same as IN supply) for reliable logic-level compatibility and noise immunity. Lower values improve rise time but increase static current; higher values risk slow edges in noisy environments.

Can the STMPS2141MTR safely drive a 1000 µF capacitive load during hot-swap?

Yes - the device's 10 ms fault blanking and current-limiting architecture are explicitly designed for heavy capacitive loads. At 5 V, inrush into 1000 µF yields ~5 A peak for <1 µs, well within the blanking window. The switch enters constant-current mode (~600 mA) before thermal stress accumulates, enabling safe hot-swap without external inrush limiters.

How does reverse current blocking behave when the output voltage exceeds input voltage?

When EN = low or VIN = 0 V, the internal MOSFET is fully off and exhibits Hi-Z behavior, blocking reverse current from OUT to IN. However, if EN = high and V_OUT > V_IN, body diode conduction occurs - this condition is explicitly prohibited per datasheet and may cause uncontrolled current flow or damage.