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Texas Instruments TPS621351RGXT — Power Management (PMIC / Gate Driver)

TI TPS621351RGXT Step-Down Regulator, 4 A, 2.5 MHz

MPNTPS621351RGXT
Active

Texas Instruments TPS621351RGXT, Step-Down Buck Regulator, Adjustable Output, 4 A, 2.5 MHz, 3 V to 17 V Input, 11-VQFN (2x3 mm), -40 to 125 °C.

$2.4200Ref. price · indicative, final on quote
Texas Instruments TPS621351RGXT datasheet (PDF)
Packaging11-VFQFN
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPS621351RGXT specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input17V
Voltage - output12V
Voltage - output (Min (Fixed))0.8V
Output current4A
Frequency2.5MHz
I/O channels1
Operating temperature-40°C~125°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Case11-VFQFN
Output configurationPositive
Synchronous rectifierYes

Product details

4 A synchronous buck in a 2×3 mm QFN

The Texas Instruments TPS621351RGXT is a 4 A synchronous step-down (buck) converter with an adjustable output from 0.8 V up to 12 V, supplied from a 3 V to 17 V input rail. It switches at 2.5 MHz, which keeps the inductor and output capacitors small — the whole supply fits in roughly the footprint of a postage stamp when you count the passives. The integrated synchronous rectifier means no external Schottky diode, saving one component and a bit of board area.

Frequently asked questions

What is the output current of TPS621351RGXT?

The TPS621351RGXT delivers a continuous 4 A output current.

Does TPS621351RGXT require external components?

As a buck converter, it requires an external inductor, input and output capacitors, and a feedback resistor divider to set the output voltage. The integrated synchronous rectifier eliminates the need for an external Schottky diode.

Can TPS621351RGXT be replaced by TPS621351RGT?

The TPS621351RGT is the same device in a different packaging option (typically cut tape or tube vs. tape and reel). Electrically identical, but verify the reel quantity and packaging format match your assembly line requirements before substituting.