STMicroelectronics STMPS2141TTR

Overview

STMPS2141TTR 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 operating range, and 135 mΩ typical R_ON at 5 V. It delivers robust power distribution for hot-swap-capable USB peripherals and industrial I/O modules.

For engineers reviewing the STMPS2141TTR datasheet, STMPS2141TTR pinout, STMPS2141TTR application, or STMPS2141TTR equivalent, key selection criteria include current-limit threshold accuracy, fault-blanking timing, UVLO hysteresis, thermal shutdown recovery behavior, and reverse-current blocking capability under disabled conditions.

Technical Context

The STMPS2141TTR integrates an N-channel high-side MOSFET with internal current sensing and thermal foldback. Its protection logic combines 10 ms fault blanking (for transient overloads), immediate FAULT assertion on die overtemperature (>135 °C) or UVLO (<2.2 V rising, <1.9 V falling), and automatic thermal recovery once junction cools below 125 °C.

It operates with CMOS/TTL-compatible EN input (active-low), supports reverse-current blocking when disabled, and maintains <12 µA standby supply current. The device uses internal voltage regulation to sustain stable gate drive across its full 2.7–5.5 V input range, ensuring consistent R_ON and switching performance.

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 junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22965DSGR and AP22653WU-7, the STMPS2141TTR uniquely combines UL recognition, precise 10 ms blanking, and active-low enable in a compact SOT23-5L - making it optimal for safety-compliant, hot-swap-ready industrial interfaces.

Availability

STMPS2141TTR is available at Aetrix Electronics and suitable for USB peripheral power control, industrial digital I/O modules, embedded system power rail management, and medical diagnostic equipment subsystems requiring stable component supply and long-term manufacturability.

Supply support for STMPS2141TTR 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 headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

The STMPS series targets robust, certified power distribution in space-constrained applications - emphasizing fault resilience, safety compliance, and seamless integration into protected load-switching architectures.

FAQ

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

At 500 mA and 5 V input, the STMPS2141TTR dissipates 33.8 mW. With a thermal resistance of 191 °C/W, the junction-to-ambient rise is ~6.5 °C. Given a max junction temperature of 125 °C, the maximum safe ambient temperature is 118.5 °C - confirmed in Table 4 of the datasheet under "SOT23-5L" conditions.

Does the FAULT pin assert during startup when capacitive loads cause inrush current?

No. The device implements a fixed 10 ms fault blanking window that suppresses FAULT assertion during initial power-up and momentary inrush events. Only faults persisting beyond this interval - such as sustained short circuits or thermal overload - trigger the open-drain FAULT output, as detailed in Section 3.1.

Can STMPS2141TTR block reverse current when the output voltage exceeds input voltage?

Yes - but only when the switch is disabled (EN high). In this state, the output presents high impedance, preventing reverse current flow from VOUT to VIN. However, if the switch is enabled and VOUT > VIN, reverse current will flow; this condition is explicitly prohibited per Section 3.4 of the datasheet.

Is the enable input compatible with 1.8 V logic systems?

No. The EN pin is specified for CMOS/TTL compatibility with V_IN = 2.7–5.5 V. Its logic thresholds are referenced to V_IN: VIH ≥ 0.7×V_IN, VIL ≤ 0.3×V_IN. At minimum 2.7 V supply, VIH is ~1.89 V - so 1.8 V logic may not reliably assert enable; level-shifting is required for sub-2 V control interfaces.