Texas Instruments TPS2080D

Overview

TPS2080D from Texas Instruments is a dual-channel high-side power-distribution switch featuring two independent 80-mΩ N-channel MOSFETs, 500 mA continuous current per channel, and integrated thermal/short-circuit protection with open-drain overcurrent outputs. It operates from 2.7 V to 5.5 V, supports CMOS/TTL enable inputs, and delivers controlled 2.5-ms rise time for hot-plug USB peripherals and embedded I/O modules.

For engineers reviewing the TPS2080D datasheet, TPS2080D pinout, TPS2080D application, or TPS2080D equivalent, key selection criteria include per-channel current limiting (1.0 A short-circuit trip), independent enable polarity options (TPS2080D uses active-high EN1/EN2), SOIC-8 thermal performance (377 mW at 85°C), and bidirectional switching capability without body diode conduction path.

Technical Context

The TPS2080D integrates an internal charge pump enabling full gate drive down to 2.7 V input, eliminating external components while maintaining precise output voltage ramp control. Its dual thermal trip architecture (140°C primary, 160°C secondary) isolates faults per channel without affecting adjacent switch operation.

Each channel features independent current-sense FET-based overload detection that forces constant-current mode during overloads, with OCx assertion confirming fault status. Undervoltage lockout (2.0 V threshold, 100 mV hysteresis) ensures reliable power-up sequencing and hot-insertion safety.

Key Specifications

Pinout & Package

TPS2080D is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, JEDEC MS-012AC compliant, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2081D, TPS2080D offers consistent active-high enables across both channels, simplifying control logic; compared with TPS2062D, it delivers superior thermal fault isolation and lower on-resistance, making it preferred for robust industrial hot-swap designs.

Availability

TPS2080D is available at Aetrix Electronics and suitable for USB peripheral power control, industrial I/O module protection, and hot-swap backplane interface applications requiring stable component supply and long-term production continuity.

Supply support for TPS2080D 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs and industrial-grade interface solutions.

The TPS208x family was designed specifically for robust hot-plug power distribution in USB, industrial I/O, and modular computing systems - emphasizing fault containment, low-voltage operation, and EMI-controlled switching.

FAQ

What is the maximum continuous current per channel for the TPS2080D?

The TPS2080D supports 500 mA continuous current per channel under recommended operating conditions (TA ≤ 85°C, VI(IN) = 2.7 V to 5.5 V). This rating is validated with SOIC-8 thermal derating (377 mW at 85°C) and accounts for rDS(on) increase with temperature. Exceeding 500 mA continuously risks thermal shutdown unless board-level heatsinking is implemented.

Does the TPS2080D support bidirectional current flow?

Yes, the TPS2080D supports bidirectional current flow due to its N-channel MOSFET high-side configuration with no intrinsic body diode conduction path from OUT to IN. This allows reverse current blocking - critical for preventing backfeeding between isolated power domains - while still permitting controlled forward conduction when enabled.

How does the overcurrent (OC) pin function on the TPS2080D?

The OC pin on the TPS2080D is an open-drain output asserted low whenever either channel experiences overcurrent or overtemperature. It remains low until the fault condition clears and junction temperature drops below the hysteresis threshold (~120°C). The pin requires an external pull-up resistor (typically 10 kΩ to VI(IN)) to interface with microcontroller GPIOs for system-level fault logging.

What is the enable input logic polarity for the TPS2080D?

The TPS2080D uses active-high logic on both EN1 and EN2 pins: a logic high (≥2.0 V) enables the corresponding channel, while a logic low (<0.4 V) disables it. This matches standard CMOS/TTL levels and differs from TPS2081D (EN1 high / EN2 low) and TPS2082D (both active-low), as confirmed in TI's packaged device table.

Can the TPS2080D operate from a 3.3-V supply?

Yes, the TPS2080D operates reliably from a 3.3-V supply, as its specified input range is 2.7 V to 5.5 V. At 3.3 V, typical rDS(on) is 90–125 mΩ (depending on temperature), supporting full 500 mA continuous current with acceptable power dissipation in SOIC-8. The internal charge pump ensures proper gate drive even at this minimum rail.