Skip to main content
Log in
Texas Instruments TPS65581PWPR — Power Management (PMIC / Gate Driver)

TPS65581PWPR Triple Buck Regulator, D-CAP2, 700 kHz

MPNTPS65581PWPR
Active

Texas Instruments D-CAP2™ triple-output step-down regulator, TPS65581PWPR, buck topology, adjustable output, 1.5 A and 2.5 A channels, 700 kHz switching frequency, 4.5 V to 18 V input, -40°C to 85°C, 20-PowerTSSOP (HTSSOP) package.

$2.1780Ref. price · indicative, final on quote
Texas Instruments TPS65581PWPR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS65581PWPR specifications
ParameterValue
SeriesD-CAP2™
Output typeAdjustable
MountingSurface Mount
Voltage - input4.5V
Voltage - output7V
Voltage - output (Min (Fixed))0.764V
Output current1.5A, 2.5A
Frequency - switching700kHz
I/O channels3
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Case20-PowerTSSOP (0.173\", 4.40mm Width)
Output configurationPositive
Synchronous rectifierYes

Product details

The TPS65581PWPR: Two channels deliver 2.5 A each, and a third delivers 1.5 A, all with synchronous rectification. The 700 kHz switching frequency is a practical middle ground — high enough to keep the output inductor in the 2.2 µH to 4.7 µH range for most designs, yet low enough to avoid excessive switching losses in the integrated FETs. The D-CAP2 architecture gives fast transient response without external compensation, which simplifies the BOM for point-of-load rails in set-top boxes, networking gear, and industrial control boards.

The base product number TPS65581 shares the same die and pinout across the PWP (tube) and PWPR (tape-and-reel) suffix variants — the PWPR is the reel-packaged version for automated assembly.

Frequently asked questions

Can TPS65581PWPR be used in a 5 V input design?

Yes. The minimum input voltage is 4.5 V, so a regulated 5 V bus provides adequate headroom. The 700 kHz switching frequency and D-CAP2 control work well at 5 V input; the output can be set anywhere from 0.764 V to 7 V.

Can TPS65581PWPR replace TPS65581PWP?

Yes — the PWPR suffix indicates tape-and-reel packaging, while the PWP suffix is tube. The die, pinout, and electrical ratings are identical. The PWPR is suited for pick-and-place assembly lines; the PWP is for hand-assembly or low-volume builds. Both share the same base product number TPS65581.