Texas Instruments TPS2048D

Overview

TPS2048D from Texas Instruments is a quad high-side power-distribution switch with independent active-low enable inputs, 135-mΩ max R_DS(on) at 5 V, 250 mA continuous per channel, and integrated thermal/current limiting for USB-compliant hot-plug applications in notebook PCs and peripherals.

For engineers reviewing the TPS2048D datasheet, TPS2048D pinout, TPS2048D application, or TPS2048D equivalent, key selection criteria include its 2.7–5.5 V operating range, 0.44 A short-circuit current limit at 25°C, SOIC-16 package, and dual-threshold thermal protection enabling fault isolation without disrupting adjacent channels.

Technical Context

The TPS2048D integrates four independent N-channel MOSFET high-side switches, each driven by an internal charge pump that enables operation down to 2.7 V while controlling rise/fall times (2.5 ms typical rise) to suppress inrush current and EMI. Each channel features dedicated overcurrent logic output (OCx, open-drain, active low) and undervoltage lockout (~2 V threshold).

Its thermal protection implements a dual-trip architecture: at ~140°C, only the faulted channel shuts off; at ~160°C, all channels disable. The device uses sense-FET current monitoring-not shunt resistors-enabling accurate, low-loss current limiting and automatic recovery after cooling.

Key Specifications

Pinout & Package

TPS2048D is housed in a 16-pin SOIC (D package), surface-mount, with exposed pad not present. Pin numbering follows standard SOIC top-view convention (pin 1 at top-left corner, counterclockwise).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2058D and TPS2068DR, the TPS2048D delivers precise 250-mA channel rating, lowest R_DS(on), and native active-low enable - making it the preferred choice for legacy USB 2.0 hub designs and cost-sensitive embedded systems requiring minimal external components.

Availability

TPS2048D is available at Aetrix Electronics and suitable for USB 2.0 bus-powered hubs, notebook peripheral protection, and industrial docking stations requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS2048D 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 solutions with decades of power management innovation.

The TPS2048D belongs to TI's power-distribution switch product line, engineered specifically for USB-compliant hot-plug applications requiring per-port current limiting, thermal fault isolation, and seamless integration into space-constrained portable electronics.

FAQ

What is the maximum continuous current per channel for the TPS2048D?

The TPS2048D supports 250 mA continuous current per channel across its full operating temperature range (–40°C to 85°C ambient). This rating is validated under recommended conditions (VI(INx) = 2.7 V to 5.5 V) and accounts for thermal derating in the SOIC-16 package. Exceeding this current may trigger current-limit mode or thermal shutdown depending on duration and ambient conditions.

Does the TPS2048D require external components to operate from a 3.3-V supply?

No, the TPS2048D does not require external components to operate from a 3.3-V supply. Its integrated charge pump enables full functionality down to 2.7 V without bootstrap capacitors or auxiliary supplies. Only standard 0.01–0.1 µF ceramic bypass capacitors on IN1 and IN2 are required per the datasheet recommendations.

How does the TPS2048D handle simultaneous short circuits on multiple channels?

The TPS2048D handles simultaneous short circuits using its dual-threshold thermal protection: at ~140°C, only the faulted channel shuts off; if junction temperature rises further to ~160°C due to cumulative dissipation, all four channels disable. This staged response isolates faults while maintaining partial system operation longer than single-threshold devices.

Can the OCx outputs of the TPS2048D be wire-OR'd together for consolidated fault reporting?

Yes, the OCx outputs (open-drain, active-low) of the TPS2048D can be safely wire-OR'd with a single pull-up resistor to report any channel fault on one MCU interrupt line. However, this loses per-channel diagnostic granularity. For full visibility, each OCx should connect to a separate GPIO with individual pull-ups, as confirmed in the functional block diagram and terminal functions table.

What is the purpose of the separate GND1 and GND2 pins on the TPS2048D?

The separate GND1 and GND2 pins on the TPS2048D provide isolated ground return paths for the two independent input domains (IN1/OUT1/OUT2 and IN2/OUT3/OUT4). This separation minimizes ground bounce coupling between channels, improves thermal distribution across the die, and supports dual-rail or redundant power architectures without requiring external ground-plane segmentation.