Texas Instruments TPS2057DR

Overview

TPS2057DR from Texas Instruments is a triple-channel, current-limited, high-side N-channel MOSFET power-distribution switch with 135 mΩ on-resistance (at 5 V), 250 mA continuous per channel, and active-high enable logic. It integrates independent overcurrent and thermal protection with open-drain OCx outputs, operates from 2.7 V to 5.5 V, and is used in USB-powered hubs and hot-plug peripheral power rails.

For engineers reviewing the TPS2057DR datasheet, TPS2057DR pinout, TPS2057DR application, or TPS2057DR equivalent, this device is selected for robust, fault-tolerant 5-V/3.3-V power rail switching in space-constrained SOIC-16 designs requiring precise current limiting, automatic thermal recovery, and ESD-hardened (2-kV HBM) operation across –40°C to 85°C ambient.

Technical Context

The TPS2057DR implements three independent high-side switches driven by an internal charge pump that enables full enhancement of the N-channel MOSFETs down to 2.7 V input - eliminating external gate-drive components. Each channel features dedicated current-sense FETs for accurate 440 mA short-circuit limit and thermal shutdown at ~140°C with 20°C hysteresis.

Its enable inputs are active-high (EN1–EN3), and overcurrent outputs (OC1–OC3) are open-drain, active-low signals tied to each channel's fault status. Undervoltage lockout disables all switches below ~2 V input, while rise/fall times (2.5 ms / 4.4 ms typical at 5.5 V) are internally controlled to suppress inrush current and EMI during hot-insertion events.

Key Specifications

Pinout & Package

TPS2057DR is housed in a 16-pin SOIC (D package), tape-and-reel format (R suffix), with exposed pad not present. Pin functions are validated per TI SLVS194 datasheet Figure 1 (top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2057DR, TPS2047DR offers identical protection and performance but requires active-low control, while TPD3S014RGER trades channel count and independent fault reporting for integrated USB data-line ESD protection in smaller footprint - neither is pin-compatible, but both serve adjacent USB power management roles.

Availability

TPS2057DR is available at Aetrix Electronics and suitable for USB bus-powered hubs, hot-plug peripheral ports, and notebook docking stations requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS2057DR 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

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The TPS20xx family was designed specifically for USB-compliant, hot-pluggable power distribution - emphasizing fault isolation, controlled inrush, and wide-input-voltage operation in compact SOIC packages.

FAQ

What is the enable logic polarity of the TPS2057DR?

The TPS2057DR uses active-high enable inputs (EN1, EN2, EN3). A logic high (≥2 V) turns on the corresponding channel; a logic low disables it. This differs from the TPS2047DR, which uses active-low enables. The TPS2057DR's enable behavior simplifies interface with most microcontrollers and FPGA I/O banks without requiring inverters or pull-down resistors.

Does the TPS2057DR support 3.3-V input operation?

Yes, the TPS2057DR operates across 2.7 V to 5.5 V input voltage. At 3.3 V, its typical rDS(on) is 105 mΩ (25°C), rising to 150 mΩ at 125°C junction temperature. The internal charge pump ensures reliable gate drive even at minimum input, maintaining 250 mA continuous current capability and stable current-limit accuracy down to 2.7 V.

How does the TPS2057DR respond to a short-circuit event?

Upon detecting an overcurrent (e.g., short at OUTx), the TPS2057DR immediately enters constant-current mode at ~440 mA, reducing output voltage while sustaining current. If the fault persists, junction temperature rises; at ~140°C, the affected channel shuts off independently. OCx pulls low and remains asserted until the fault clears and temperature drops ~20°C, enabling automatic recovery without host intervention.

Can the TPS2057DR drive capacitive loads typical of USB ports?

Yes - the TPS2057DR's controlled 2.5-ms rise time (5.5 V, 1 µF load) and internal charge pump minimize inrush current into large output capacitances. For heavy capacitive loads (>100 µF), adding a 500-µs RC filter to OCx prevents false overcurrent triggering during hot-plug events, as documented in TI SLVS194 Figure 30.

What is the thermal resistance (θJA) of the TPS2057DR in SOIC-16 package?

The TPS2057DR in 16-pin SOIC (D package) has a junction-to-ambient thermal resistance (θJA) of 172°C/W, per TI SLVS194. At maximum 250 mA per channel and 135 mΩ rDS(on), worst-case power dissipation per switch is ~8.4 mW - well within safe operating limits at 85°C ambient. Full thermal analysis should use Figure 21 for rDS(on) vs. temperature and Equation PD = rDS(on) × I².