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Texas Instruments TPS2540ARTER — Power Management (PMIC / Gate Driver)

Texas Instruments TPS2540ARTER USB Switch, 73 mOhm, 2.5 A

MPNTPS2540ARTER
Active

Texas Instruments TPS2540ARTER USB high-side power switch, single output, 73 mOhm Rds(on), 2.5 A max, adjustable current limit, over-temperature and UVLO protection, 16-WQFN (3x3 mm), -40°C to 125°C.

$0.9030Ref. price · indicative, final on quote
Texas Instruments TPS2540ARTER datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS2540ARTER specifications
ParameterValue
Input typeNon-Inverting
Output typeN-Channel
TypeUSB Switch
MountingSurface Mount
Voltage - load4.5V ~ 5.5V
Voltage - supply (Vcc (Vdd))Not Required
Output current2.5A
I/O channels1
InterfaceOn/Off
Operating temperature-40°C~125°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesStatus Flag
Rds on73mOhm
Case16-WFQFN Exposed Pad
Fault protectionCurrent Limiting (Adjustable), Over Temperature, UVLO
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

The TPS2540ARTER is a single-channel USB high-side switch from Texas Instruments, built to power a USB host port or a dedicated charging port with a continuous 2.5 A output. The 73 mOhm typical on-resistance is the number that sets the voltage drop from input to output at full load — at 2.5 A that drop is about 180 mV, so the load side still sees a solid 4.8 V from a 5 V rail.

Fault protection set — adjustable current limit, over-temperature, UVLO

The fault-protection stack covers the three failure modes that kill a USB port: a shorted cable (adjustable current limit), a stalled fan or hot-plug surge (over-temperature shutdown), and a sagging 5 V rail (UVLO). The current limit is adjustable with a single resistor, so the same board can be configured for a 500 mA legacy port or a 2.5 A charging port by changing one BOM value. The Status Flag output (open-drain, active low) tells the host controller that the switch has hit the limit or shut down — no polling, no software loop.

That means no last-time-buy window to chase, no surplus-market scramble.

Frequently asked questions

What is the Rds(on) of TPS2540ARTER?

The typical Rds(on) is 73 mOhm. That is the on-resistance at 25°C with a 5 V gate drive — the number you use to calculate the voltage drop and the I²R heating at your load current.

What fault protection does TPS2540ARTER provide?

It provides adjustable current limiting, over-temperature shutdown, and under-voltage lockout (UVLO). The current limit is set with a single external resistor, so you can configure the port for 500 mA or 2.5 A without changing the switch itself.

Is TPS2540ARTER a direct replacement for TPS2540?

The TPS2540ARTER shares the same base product number (TPS2540) and the same function — single USB high-side switch with adjustable current limit. The 'RTER' suffix indicates the tape-and-reel packaging variant. Electrically and pin-for-pin it is the same die in the same 16-WQFN package.

Is the TPS2540ARTER compatible with USB 2.0?

Yes. The switch is a power-path device — it handles the VBUS rail. The data lines (D+ and D-) are not switched by this part; they pass through the host controller or a separate data switch. The 73 mOhm Rds(on) and 2.5 A current rating meet the USB 2.0 power delivery requirements for a standard downstream port or a dedicated charging port.