Texas Instruments TPS2048AD

Overview

TPS2048AD from Texas Instruments is a quad-channel, high-side N-channel MOSFET power-distribution switch with independent enable control per channel, 80-mΩ typical r_DS(on) at 5 V, 250 mA continuous current per channel, and integrated thermal/short-circuit protection. It operates from 2.7 V to 5.5 V and is used in USB peripheral hubs, portable docking stations, and multi-rail embedded power management systems.

For engineers reviewing the TPS2048AD datasheet, TPS2048AD pinout, TPS2048AD application, or TPS2048AD equivalent, key selection considerations include per-channel enable logic polarity (active-high for TPS2048A), quad-channel OCx open-drain fault signaling, SOIC-16 package thermal derating, and 2.5-ms typical output rise time under 1-µF load conditions.

Technical Context

The TPS2048AD integrates four independent high-side power switches, each driven by an internal charge pump enabling operation down to 2.7 V input while maintaining gate overdrive. Each channel features dedicated ENx inputs (active-high), GNDA/GNDB dual ground domains, and separate OCx open-drain outputs for fault reporting.

Current limiting is implemented via sense-FET architecture with 0.5 A short-circuit trip threshold and constant-current mode clamping; thermal protection uses dual-threshold shutdown (≈140°C trip, ≈120°C recovery) per switch to isolate faults without affecting adjacent channels.

Key Specifications

Pinout & Package

TPS2048AD is housed in a 16-pin SOIC (D) package with exposed pad (not thermally enhanced), 1.27 mm pitch, and standard JEDEC MS-012AC footprint. Pin numbering follows top-view orientation with Pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2048AD, TPS2048A offers identical performance in the same SOIC-16 package but lacks the 'D' suffix denoting tape-and-reel packaging; TPS2058AD provides double the current rating at the cost of higher on-resistance and reduced efficiency at 250 mA loads.

Availability

TPS2048AD is available at Aetrix Electronics and suitable for USB peripheral hubs, portable docking stations, and industrial HMI systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS2048AD 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies.

The TPS204xA family was designed specifically for robust, current-limited power distribution in USB-compliant and portable electronics applications where heavy capacitive loads and short circuits are common.

FAQ

What is the enable logic polarity for TPS2048AD?

The TPS2048AD uses active-high enable inputs (EN1–EN4). A logic high voltage ≥2 V on any ENx pin turns on the corresponding channel. This matches TTL/CMOS logic levels directly and eliminates the need for inverters in most microcontroller interface designs. The TPS2048AD datasheet confirms this behavior in the Terminal Functions table and Functional Block Diagram.

Does TPS2048AD support independent input rails for its four channels?

Yes, TPS2048AD supports two independent input domains: IN1 powers OUT1 and OUT2 (with GNDA), and IN2 powers OUT3 and OUT4 (with GNDB). This dual-input architecture allows connection to separate 5 V and 3.3 V sources or isolated power domains, improving system flexibility and noise isolation. The pinout diagram and Terminal Functions section explicitly define these segregated paths.

What is the maximum continuous current per channel for TPS2048AD?

The TPS2048AD is rated for 250 mA continuous current per channel under recommended operating conditions (T_A ≤ 85°C, SOIC-16 package). This value is specified in the Recommended Operating Conditions table and confirmed in the Electrical Characteristics section. Exceeding this limit risks triggering current-limit mode or thermal shutdown depending on ambient and PCB layout conditions.

How does the overcurrent (OCx) output behave during a fault condition?

Each OCx pin on the TPS2048AD is an open-drain output that pulls low during overcurrent or thermal fault conditions on its associated channel. It remains asserted until the fault is cleared and the device recovers. External pull-up resistors are required to generate a logic-high signal in normal operation. This behavior is documented in the Terminal Functions and Detailed Description sections of the datasheet.

Can TPS2048AD operate from a 3.3 V supply?

Yes, TPS2048AD operates from 2.7 V to 5.5 V, making it fully compatible with 3.3 V systems. At 3.3 V input, the typical r_DS(on) is 90 mΩ (25°C), resulting in <24 mV dropout at 250 mA. The internal charge pump ensures reliable gate drive even at minimum input voltage, as verified in the Electrical Characteristics tables and Figure 18 (r_DS(on) vs. T_J).