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Texas Instruments TPS2546QRTERQ1 — Power Management (PMIC / Gate Driver)

TPS2546QRTERQ1 USB Power Switch, 73mOhm, AEC-Q100, NRND

MPNTPS2546QRTERQ1
NRND

Texas Instruments TPS2546QRTERQ1, Automotive AEC-Q100 USB Power Switch, 1 output, High Side, N-Channel, 73mOhm Rds(on) typ, 2.5A max, 4.5V~5.5V, 16-WFQFN Exposed Pad, -40°C~125°C.

$1.8400Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS2546QRTERQ1 specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Input typeNon-Inverting
Output typeN-Channel
TypeUSB Switch
MountingSurface Mount
Voltage - load4.5V ~ 5.5V
Output current2.5A
I/O channels1
InterfaceOn/Off
Operating temperature-40°C~125°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesLoad Discharge
Rds on73mOhm
Case16-WFQFN Exposed Pad
Fault protectionCurrent Limiting (Adjustable), Over Temperature, UVLO
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

Its typical on-resistance of 73 mOhm sets the conduction loss at 2.5 A output — roughly 0.46 W dissipation before you factor in the package thermal resistance.

Adjustable current limit and fault protection

The switch integrates adjustable current limiting, over-temperature shutdown, and UVLO. The current-limit threshold is set with an external resistor, giving the designer control over the trip point rather than a fixed factory trim. Output is an N-channel MOSFET with a non-inverting On/Off interface and a load-discharge feature that pulls the output low when disabled — useful for preventing floating VBUS in USB applications.

That means TI is not actively promoting it for new projects, though it remains available through existing distribution channels for ongoing production.

Frequently asked questions

Is TPS2546QRTERQ1 obsolete or NRND?

It is not yet discontinued, but TI recommends evaluating current-production alternatives for new designs.

What is the Rds(on) of TPS2546QRTERQ1?

The typical on-resistance is 73 mOhm. This is the resistance between drain and source when the switch is enabled at the rated input voltage.

Does TPS2546QRTERQ1 have adjustable current limiting?

Yes, the current limit is adjustable via an external resistor, giving flexibility to set the trip point for different load requirements.