Texas Instruments TPS2048DR

Overview

TPS2048DR from Texas Instruments is a quad-channel, active-low enable, current-limited high-side power-distribution switch with 135-mΩ on-resistance (at 5 V), 250 mA continuous per channel, and integrated thermal/short-circuit protection. It operates from 2.7 V to 5.5 V and delivers controlled power switching for USB peripheral ports and hot-plug applications.

For engineers reviewing the TPS2048DR datasheet, TPS2048DR pinout, TPS2048DR application, or TPS2048DR equivalent, this page provides verified functional identity, SOIC-16 package mapping, confirmed 4-channel independent enable/OC logic, thermal trip at ~140°C, and design-meaningful specifications including rise time (2.5 ms), standby current (≤20 µA), and bidirectional switching capability.

Technical Context

The TPS2048DR integrates four independent N-channel MOSFET high-side switches with internal charge-pump gate drive enabling operation down to 2.7 V input. Each channel features dedicated active-low enable (EN1–EN4) and open-drain overcurrent flag (OC1–OC4), supporting fault-isolated power control in multi-rail systems.

Its current-limit architecture uses a sense FET-not external resistors-to detect overload and enter constant-current mode at 440 mA typical (25°C). Thermal protection implements dual-threshold shutdown (~140°C trip, ~120°C recovery) per switch, allowing adjacent channels to remain operational during localized faults.

Key Specifications

Pinout & Package

TPS2048DR is housed in a 16-pin SOIC (D) package, tape-and-reel format (R suffix), with exposed pad not present. Pin functions are validated per TI SLVS192 datasheet Figure 1 (top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2058DR and TPS2068DR, the TPS2048DR offers deterministic active-low enable timing and optimized 250 mA continuous rating-making it ideal for USB-compliant, space-constrained, and firmware-tight designs where precise low-side logic compatibility and predictable fault response are critical.

Availability

TPS2048DR is available at Aetrix Electronics and suitable for USB peripheral protection, hot-insertion power management, and notebook docking station designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS2048DR 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 over 50 years of innovation in high-reliability IC design.

The TPS2048DR belongs to TI's power-distribution switch product line, engineered specifically for robust, fault-tolerant USB and hot-plug applications where independent channel control, low quiescent current, and thermal resilience are mandatory.

FAQ

What is the enable logic polarity of the TPS2048DR?

The TPS2048DR uses active-low enable inputs (EN1–EN4). A logic-low signal on any ENx pin turns on the corresponding power switch (e.g., EN1 low enables IN1→OUT1). This is confirmed in the Terminal Functions table of the SLVS192 datasheet and distinguishes it from the active-high TPS2058DR. The TPS2048DR's enable behavior is fixed and cannot be reconfigured.

Does the TPS2048DR support bidirectional current flow?

No-the TPS2048DR is a unidirectional high-side N-channel MOSFET switch. It blocks reverse current (OUT→IN) when disabled and does not conduct in reverse direction when enabled. Its "bidirectional switch" description in the datasheet refers to its ability to handle forward current and withstand reverse voltage stress-not true bidirectional conduction like a transmission gate.

What is the thermal shutdown behavior of the TPS2048DR during sustained overload?

Under sustained overload, the TPS2048DR enters thermal shutdown at ~140°C junction temperature, turning off the affected channel while others remain active. After cooling ~20°C (to ~120°C), it automatically recovers. If the fault persists, it cycles on/off-confirmed in the Thermal Sense section of SLVS192-and asserts the corresponding OCx pin low throughout the event.

Can the TPS2048DR operate from a 3.3-V supply?

Yes-the TPS2048DR operates across 2.7 V to 5.5 V, and its internal charge pump ensures reliable gate drive even at 3.3 V input. At 3.3 V, rDS(on) rises to 105 mΩ (typ, 25°C), still supporting 250 mA continuous with acceptable power dissipation. This makes the TPS2048DR suitable for mixed-voltage systems and low-power embedded hosts.

How does the TPS2048DR handle inrush current with large output capacitance?

The TPS2048DR controls inrush via its 2.5-ms typical rise time (tr), which limits di/dt and suppresses EMI. For heavy capacitive loads (>100 µF), an RC filter (e.g., 10 kΩ + 50 nF = 500 µs) on the OCx pin is recommended to avoid false overcurrent trips caused by initial charging current-per Application Information Section "OC response" in SLVS192.