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Texas Instruments TPS2549RTER — Power Management (PMIC / Gate Driver)

TPS2549RTER USB Power Switch, 47 mOhm, 3 A, 16-WQFN

MPNTPS2549RTER
Active

Texas Instruments TPS2549RTER USB power switch, 1:1 high-side N-channel, 47 mOhm typical Rds(on), 3 A continuous, 4.5 V to 6.5 V load, 16-WQFN (3x3 mm), -40°C to 125°C.

$2.2300Ref. price · indicative, final on quote
Texas Instruments TPS2549RTER datasheet (PDF)
Packaging16-WFQFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPS2549RTER specifications
ParameterValue
Input typeNon-Inverting
Output typeN-Channel
TypeUSB Switch
MountingSurface Mount
Voltage - load4.5V ~ 6.5V
Voltage - supply (Vcc (Vdd))Not Required
Output current3A
I/O channels1
InterfaceOn/Off
Operating temperature-40°C~125°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesLoad Discharge, Status Flag
Rds on47mOhm
Case16-WFQFN Exposed Pad
Fault protectionCurrent Limiting (Adjustable), Over Temperature, Over Voltage, UVLO
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

USB power switch with adjustable current limit and overvoltage protection

The Texas Instruments TPS2549RTER is a single-channel, high-side N-channel USB power switch in a 16-WQFN (3x3 mm) package. It delivers up to 3 A continuous from a 4.5 V to 6.5 V load supply. The switch integrates adjustable current limiting, overvoltage protection (OVP), overtemperature shutdown, and undervoltage lockout (UVLO). A status flag output reports fault conditions. The load-discharge feature pulls the output low when the switch is off, preventing a floating VBUS that could confuse a connected device.

What the 47 mOhm Rds(on) and 3 A rating mean for the BOM

At 3 A, the 47 mOhm typical Rds(on) produces dissipation inside the 3x3 mm QFN. Heat exits through the exposed pad to the PCB copper. The adjustable current limit (set by an external resistor) lets you tailor the trip point below 3 A for smaller loads or cable protection. The overvoltage clamp protects downstream circuitry if the VBUS rail gets hit with a transient above 6.5 V — a real risk on long USB cables in industrial noise environments.

The ROHS3 compliance covers current EU and global solderability requirements.

Frequently asked questions

Does TPS2549RTER have overvoltage protection?

Yes, the TPS2549RTER includes overvoltage protection (OVP) as part of its fault-protection set, along with adjustable current limiting, overtemperature shutdown, and undervoltage lockout.

What is the TPS2549RTER used for?

It is a USB power switch designed for USB VBUS power distribution — typical applications include USB charging ports (BC1.2, Type-C), downstream USB hubs, and industrial or automotive USB ports requiring adjustable current limiting and overvoltage protection.

What is the closest pin-compatible alternative to TPS2549RTER?

The TPS2549RTER is part of the TPS2549 family (base number TPS2549). Within the same family, the TPS2549RTET (same die in a different reel quantity) is functionally identical. For a different feature set — such as integrated cable compensation or a different fault-response scheme — the TPS2546 or TPS2547 series are worth evaluating, but verify pin compatibility against the datasheet before substituting.