Texas Instruments TPS2043AD

Overview

TPS2043AD from Texas Instruments is a triple-channel, current-limited, high-side N-channel MOSFET power-distribution switch with independent enable control per channel and integrated thermal/short-circuit protection. It features 80-mΩ on-resistance (at 5 V), 500 mA continuous current per channel, 2.7–5.5 V input range, and active-low enable inputs. It is used in USB-powered hubs, peripheral docking stations, and multi-rail embedded systems requiring fault-tolerant power sequencing.

For engineers reviewing the TPS2043AD datasheet, TPS2043AD pinout, TPS2043AD application, or TPS2043AD equivalent, key selection criteria include per-channel current limiting (0.5 A), independent OCx fault reporting, SOIC-16 package footprint, and compatibility with 2.7-V minimum supply rails in space-constrained industrial and computing applications.

Technical Context

The TPS2043AD integrates three independent high-side switches, each driven by an internal charge pump enabling operation down to 2.7 V without external components. Each channel includes dedicated overcurrent sensing via sense-FET architecture and thermal shutdown with ~20°C hysteresis for autonomous recovery.

It implements undervoltage lockout (~2 V trip) and supports bidirectional current flow blocking when disabled. The device uses separate ground pins (GNDA/GNDB) to isolate IN1/OUT1/OUT2 and IN2/OUT3 domains, minimizing ground bounce between channels during switching transients.

Key Specifications

Pinout & Package

TPS2043AD is housed in a 16-pin SOIC (D) package with exposed pad (not thermally enhanced). Pin functions are validated per TI SLVS247 datasheet Figure 4 and Terminal Functions table for TPS2043A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2053AD and TPS2043BD, the TPS2043AD offers optimal cost-performance balance for commercial-temperature applications requiring active-low enable control and strict USB-compliant current limiting without layout changes.

Availability

TPS2043AD is available at Aetrix Electronics and suitable for USB peripheral hubs, industrial I/O modules, and embedded docking stations requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS2043AD 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 specializing in analog, embedded processing, and power management technologies with decades of expertise in high-reliability power-switch ICs.

The TPS204x family was designed specifically for USB-compliant, fault-tolerant power distribution in portable and embedded systems - emphasizing per-channel protection, low quiescent current, and robust thermal management.

FAQ

What is the maximum continuous current rating per channel of the TPS2043AD?

The TPS2043AD supports 500 mA continuous current per channel under recommended operating conditions (TA = 0°C to 85°C, VI(IN) = 2.7 V to 5.5 V). This rating is validated across all three channels simultaneously, with thermal derating applied per the SOIC-16 dissipation rating table (377 mW at 85°C ambient).

Does the TPS2043AD require external components for charge pump operation?

No, the TPS2043AD integrates a fully self-contained charge pump that operates from input voltages as low as 2.7 V and requires no external capacitors or inductors. This internal pump ensures proper gate drive for the N-channel MOSFETs across the full input range, eliminating board space and BOM cost associated with external boost circuitry.

How does the TPS2043AD handle overcurrent and thermal faults?

The TPS2043AD responds to overcurrent by entering constant-current mode (typically 0.9 A short-circuit limit), then asserts the corresponding OCx pin low. If sustained, thermal buildup triggers channel-specific shutdown at ~140°C junction temperature. Recovery is automatic after cooling ~20°C - all without host intervention. OCx outputs remain asserted until the fault clears.

Can the TPS2043AD be used with 3.3-V logic enable signals?

Yes, the TPS2043AD's enable inputs are CMOS- and TTL-compatible. With VI(ENx) = 0 V (active-low), the switch turns on; a logic high ≥2 V disables it. At 3.3-V logic levels, the input threshold (VIL ≤ 0.4 V at 2.7–4.5 V VIN) ensures reliable recognition of low-state signals, making it interoperable with standard 3.3-V MCUs and FPGAs.

What is the purpose of separate GNDA and GNDB pins on the TPS2043AD?

GNDA and GNDB provide isolated ground return paths for the two independent input domains: GNDA serves IN1, OUT1, and OUT2; GNDB serves IN2 and OUT3. This separation prevents ground-bounce coupling between channels - critical for noise-sensitive applications like mixed-signal I/O modules or USB hubs where signal integrity must be preserved across power domains.