Texas Instruments TPS2015D

Overview

TPS2015D from Texas Instruments is a high-side, 95-mΩ n-channel MOSFET power distribution switch with integrated overcurrent and thermal protection, designed for USB self-powered and bus-powered hub applications. It delivers 1-A continuous load current (2-A short-circuit limit), features logic-level enable compatible with 3.3-V/5-V systems, and provides fault reporting via open-drain OC pin to meet USB specification requirements for hot-plug safety and host notification.

For engineers reviewing the TPS2015D datasheet, TPS2015D pinout, TPS2015D application, or TPS2015D equivalent, key selection criteria include its 85-mΩ typical on-resistance, 10-µs fast trip time, controlled rise/fall times for inrush limiting, undervoltage lockout, and SOIC-8 package compatibility with USB voltage-drop and transient-droop constraints.

Technical Context

The TPS2015D integrates a charge-pump gate driver enabling operation down to 4 V supply while maintaining precise control of MOSFET switching edges-critical for limiting inrush current during hot-insertion of USB peripherals. Its internal current-limiting circuitry transitions into constant-current mode above 2 A, sustaining safe power delivery without latch-off until fault removal or disable.

Thermal shutdown activates at junction temperatures exceeding 150 °C, providing fail-safe protection during sustained overload or short-circuit conditions. The OC output asserts low upon overcurrent detection, directly interfacing with USB hub controllers for real-time fault reporting-eliminating need for external sensing or signal conditioning circuitry.

Key Specifications

Pinout & Package

TPS2015D is housed in an 8-pin SOIC (Small-Outline Integrated Circuit) package with standard 1.27-mm pitch, optimized for compact USB hub PCB layouts and thermal dissipation via exposed pad (if variant DGN/DGQ exists; SOIC-D per TI documentation uses standard SOIC-8 footprint).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2014D, the TPS2015D supports higher continuous current for ganged-port configurations; compared with TPD3S014, it offers dedicated OC signaling for USB-compliant fault management but requires external ESD protection on data lines.

Availability

TPS2015D is available at Aetrix Electronics and suitable for USB self-powered hubs, bus-powered hubs, industrial host controllers, and embedded docking stations requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS2015D 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 connectivity technologies, with decades of leadership in USB interface solutions and power management ICs.

The TPS20xx family was engineered specifically for USB power distribution-delivering integrated overcurrent protection, inrush control, and fault reporting in compact SOIC packages to simplify compliance with USB 1.0/2.0 power architecture requirements.

FAQ

What is the maximum continuous current rating for the TPS2015D?

TPS2015D is rated for 1 A continuous load current at junction temperatures from 0 °C to 125 °C. This rating enables reliable operation in ganged two-port USB hub configurations where each port draws up to 500 mA. The device also features a 2-A typical short-circuit current limit that activates within ~10 µs to protect upstream power sources. Derating is recommended above 85 °C ambient to maintain thermal safety margin.

Does the TPS2015D require external components to operate?

TPS2015D operates autonomously with only two mandatory external components: a 0.1-µF ceramic bypass capacitor between IN and GND, and a pull-up resistor on the OC pin. Its internal charge pump eliminates need for external boost circuitry, and undervoltage lockout ensures clean startup. No external current-sense resistors, timing capacitors, or gate drivers are required-reducing BOM count and layout complexity versus discrete MOSFET solutions.

How does the TPS2015D meet USB voltage-drop requirements?

TPS2015D meets USB voltage-drop requirements primarily through its 85-mΩ typical on-resistance, which limits voltage loss to ≤42.5 mV at 500 mA-well within the 100-mV total budget allocated for overcurrent protection devices and PCB traces. When used in ganged two-port designs, its 1-A rating ensures compliance even with worst-case 120-mΩ max R_DS(on) at high temperature, leaving margin for trace resistance and connector losses while preserving ≥4.75 V at the port.

Can the TPS2015D be used in bus-powered hub designs?

Yes, TPS2015D is explicitly validated for bus-powered hub applications. Its controlled rise time limits inrush current into the mandatory 120-µF port capacitance, preventing 5-V rail droop during hot insertion. With a 4-V minimum operating voltage and 120-mΩ max R_DS(on), it satisfies USB voltage regulation even when ganging all four downstream ports (400 mA total), allowing design flexibility without compromising transient performance or safety margins.

What thermal protection mechanisms does the TPS2015D include?

TPS2015D incorporates dual thermal safeguards: first, thermal shutdown disables the switch when junction temperature exceeds 150 °C; second, thermal foldback progressively reduces the current limit as temperature rises-maintaining safe power dissipation without abrupt cutoff. Both features are fully internal and require no external components. After shutdown, the device automatically recovers once junction temperature falls below the hysteresis threshold (~140 °C), restoring power without manual reset.