STMicroelectronics ST2054BDR

Overview

ST2054BDR from STMicroelectronics is a quad-channel high-side power distribution switch featuring four independent 80mΩ N-channel MOSFETs, 500mA continuous current per channel, thermal and short-circuit protection with active-low OCx outputs, and operation from 2.7V to 5.5V supply. It targets multi-rail power management in systems with heavy capacitive loads or hot-swap requirements, such as industrial I/O modules and embedded computing backplanes.

For engineers reviewing the ST2054BDR datasheet, ST2054BDR pinout, ST2054BDR application, or ST2054BDR equivalent, key selection criteria include per-channel enable control, 10ms fault blanking, 2.5ms typical rise time, under-voltage lockout, and SO-16 package compatibility for space-constrained PCB layouts.

Technical Context

The ST2054BDR integrates an internal charge pump to drive all four high-side N-MOSFETs without external components, enabling full functionality down to 2.7V input while controlling rise/fall times to suppress inrush current. Each channel operates independently with CMOS/TTL-compatible ENx inputs and dedicated OCx fault indicators.

Current limiting is set at 0.9A (typical short-circuit threshold), with automatic transition to constant-current mode during overloads. Thermal shutdown activates above ~125°C junction temperature and recovers autonomously after cooling; UVLO ensures switch remains off until valid input voltage is established.

Key Specifications

Pinout & Package

ST2054BDR is housed in a standard SO-16 (Small Outline, 16-pin) package with 1.27 mm pitch, ECOPACK® compliant, lead-free second-level interconnect, and JEDEC-standard mechanical dimensions (D = 9.8–10.0 mm, E = 5.8–6.2 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2044BD and AP22654WM6-7, ST2054BDR uniquely combines per-channel thermal shutdown, dedicated OCx outputs, and sub-3V operation via integrated charge pump - making it optimal for industrial systems demanding robust, granular, and low-voltage power control.

Availability

ST2054BDR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded computing backplanes, medical diagnostic equipment, and test & measurement instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for ST2054BDR 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 ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

The ST2054 belongs to ST's high-side power switch product line, engineered specifically for reliable, multi-channel power distribution in harsh environments with frequent hot-swap, overload, and thermal stress events.

FAQ

What is the maximum continuous current per channel for ST2054BDR?

The ST2054BDR supports 500 mA continuous current per channel under recommended operating conditions (VI = 2.7V to 5.5V, TA = –40°C to +85°C). Its current-limit threshold is set at 0.9 A typical for short-circuit protection, and thermal shutdown activates if sustained overload causes junction temperature to exceed ~125°C.

Does ST2054BDR require external components for gate drive?

No. ST2054BDR integrates an internal charge pump that generates sufficient gate voltage to fully enhance all four N-channel MOSFETs - enabling full 80mΩ R_DS(on) performance even at 2.7V supply. No external capacitors, inductors, or boost circuitry are needed, simplifying design and reducing BOM count.

How does the 10ms fault-blanking feature work?

The 10ms OC_N fault-blanking window starts at power-up or after each ENx assertion. During this period, transient overcurrent events - such as those caused by hot-insertion or bulk capacitor charging - are ignored, preventing false OCx assertions. After blanking expires, the device resumes real-time current monitoring and pulls OCx low only upon sustained overload or short circuit.

Can ST2054BDR be used in 3.3V-only systems?

Yes. ST2054BDR is fully specified for 2.7V to 5.5V operation. At 3.3V supply, its R_DS(on) is 90–125 mΩ (typ./max), rise time is ~3 ms, and all protections (UVLO, thermal, overcurrent) remain functional. ENx inputs accept 3.3V logic levels directly, and OCx outputs are compatible with 3.3V CMOS receivers.