Skip to main content
Log in
Texas Instruments TPS51125ARGET — Discrete Semiconductors

TPS51125ARGET Texas Instruments D-CAP™ Buck Controller, 28V

MPNTPS51125ARGET
End of Life

Texas Instruments D-CAP™ series, dual-output step-down (buck) controller, TPS51125ARGET, 5.5V-28V supply, 24-VQFN (4x4) package, active.

$4.06Ref. price · indicative, final on quote
Texas Instruments TPS51125ARGET datasheet (PDF)
Packaging24-VFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesD-CAP™
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPS51125ARGET specifications
ParameterValue
SeriesD-CAP™
Output typeTransistor Driver
MountingSurface Mount
Voltage - supply (Vcc (Vdd))5.5V ~ 28V
I/O channels2
Output phases1
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Clock syncNo
Case24-VFQFN Exposed Pad
Control featuresEnable, On Time Control, Power Good
Output configurationPositive
Synchronous rectifierYes

Product details

Dual-output buck controller in a 4x4 QFN

The Texas Instruments TPS51125ARGET is a dual-output step-down (buck) controller from the D-CAP™ series, designed to drive external N-channel MOSFETs in synchronous rectifier configurations. With a supply range of 5.5 V to 28 V on Vcc/Vdd, it handles common intermediate rails from 12 V to 24 V in notebook, desktop, and industrial power systems. The two independent outputs share a single 24-VFQFN exposed-pad package (24-VQFN 4x4 mm), keeping the footprint compact for dense PCB layouts.

Where the D-CAP™ series fits

D-CAP™ is TI's proprietary constant-on-time control architecture that delivers fast transient response without external compensation — the loop stability is built into the on-time generator, so the BOM omits the usual RC network around the error amplifier. Control features include Enable, On Time Control, and Power Good — the Power Good flag can sequence downstream converters or feed a system supervisor without an external comparator.

Frequently asked questions

What is the closest functional second-source to TPS51125ARGET?

The TPS53124RGET is the closest peer in the same D-CAP™ family: also a dual-output buck controller in a 24-VQFN package with synchronous rectification and a 4.5 V minimum supply. The TPS51125ARGET has a higher maximum supply (28 V vs 4.5 V min) and adds Power Good output, so a direct drop-in depends on the supply rail voltage and whether the PG flag is used.

What compliance documentation does Texas Instruments provide for TPS51125ARGET?

The part is RoHS3 compliant (ROHS3 Compliant per). TI provides a material declaration and REACH SVHC disclosure on request through their product page.