STMicroelectronics STMPS2252TTR

Overview

STMPS2252TTR from STMicroelectronics is a dual-channel high-side power distribution switch with 100 mΩ R_DS(on), 500 mA continuous current per channel, active-high enable logic, and independent overcurrent fault reporting via open-drain OC1/OC2 outputs. It operates from 2.7 V to 5.5 V and integrates thermal shutdown, undervoltage lockout (2.5 V threshold), and 10 ms fault blanking-designed for hot-swap-capable USB peripheral ports and industrial I/O modules.

For engineers reviewing the STMPS2252TTR datasheet, STMPS2252TTR pinout, STMPS2252TTR application, or STMPS2252TTR equivalent, key selection criteria include channel enable polarity (active-high), per-channel 500 mA current limit, SO-8 package thermal resistance (160 °C/W), and reverse-current blocking behavior during OFF-state operation.

Technical Context

The STMPS2252TTR implements two independent high-side MOSFET switches controlled by CMOS/TTL-compatible EN1 and EN2 inputs. Each channel features dedicated current-sense circuitry that triggers constant-current limiting at ~800 mA short-circuit level and asserts its respective OCx output low after 10 ms fault blanking if overload persists.

Thermal protection activates at 135 °C junction temperature with 10 °C hysteresis, forcing automatic shutdown; recovery occurs only after die cools below 125 °C. UVLO disables both channels when input voltage falls below 2.5 V (±0.5 V), preventing erratic switching during brown-out conditions.

Key Specifications

Pinout & Package

STMPS2252TTR is housed in an SO-8 package (5.0 mm × 4.0 mm, 1.27 mm pitch) with standard gull-wing leads and exposed pad for thermal enhancement. Pin 1 is marked with a dot; device orientation follows JEDEC MS-012AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL92012RGER and TPS2051BDR, STMPS2252TTR uniquely delivers dual independent channels with integrated fault blanking, thermal shutdown, and per-channel OC reporting in a single SO-8 package-making it optimal for space-constrained, safety-aware multi-peripheral systems.

Availability

STMPS2252TTR is available at Aetrix Electronics and suitable for USB peripheral hubs, industrial I/O modules, automotive body control units, and point-of-load server PSUs requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for STMPS2252TTR 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, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

The STMPS series targets robust power distribution in harsh environments-designed specifically for applications demanding fault resilience, hot-swap capability, and compact dual-rail control without external protection circuitry.

FAQ

What is the enable logic polarity for STMPS2252TTR?

The STMPS2252TTR uses active-high enable inputs on EN1 and EN2 pins. When either ENx rises above 2.0 V (min), its corresponding channel turns ON; below 0.4 V (max), the channel remains OFF. This differs from the STMPS2242TTR, which uses active-low enables.

Does STMPS2252TTR support reverse current blocking when powered down?

Yes. When IN = 0 V (unpowered) or ENx = low, the internal high-side MOSFET blocks reverse current flow from OUTx to IN-even if OUTx is biased to 5.5 V. Measured reverse leakage is ≤2 µA at 25 °C and ≤10 µA at 125 °C, per datasheet Table 7.

How does fault blanking interact with thermal shutdown?

Fault blanking applies only to overcurrent events-not thermal faults. If junction temperature exceeds 135 °C, the device shuts down immediately and pulls OCx low without delay. The 10 ms blanking timer runs only during current-limit conditions and resets upon each new overcurrent event.

Can STMPS2252TTR drive capacitive loads up to 470 µF safely?

Yes. Datasheet Figures 4 and 5 confirm controlled turn-on with C_LOAD = 470 µF at 3 V and 5 V inputs. Rise time remains within 2 ms (typical), and fault blanking prevents false OC assertion during inrush. Layout best practice: place 10 µF ceramic capacitor within 5 mm of IN and GND pins.