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Texas Instruments REG104FA-2.5KTTTG3 — Power Management (PMIC / Gate Driver)

REG104FA-2.5KTTTG3 LDO Regulator, 2.5V Fixed Output, 1A

MPNREG104FA-2.5KTTTG3
End of Life

Texas Instruments REG104FA-2.5KTTTG3, LDO Voltage Regulator, Fixed 2.5V Output, 1A, 15V Input Max, 0.48V Dropout at 1A, 65dB PSRR at 120Hz, -40°C to 85°C, DDPAK/TO-263-5, Active, ROHS3 Compliant.

$7.03Ref. price · indicative, final on quote
Texas Instruments REG104FA-2.5KTTTG3 datasheet (PDF)
PackagingTO-263-6, D²Pak (5 Leads + Tab), TO-263BA
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

REG104FA-2.5KTTTG3 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input15V
Voltage dropout0.48V @ 1A
Voltage - output (Min (Fixed))2.5V
Output current1A
Current - supply1.8 mA
Current - quiescent0.7 mA
Operating temperature-40°C ~ 85°C
PSRR65dB (120Hz)
PackageTape & Reel (TR); Cut Tape (CT)
CaseTO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Control featuresEnable
Protection featuresOver Current, Over Temperature
Number of regulators1
Output configurationPositive

Product details

Fixed 2.5 V rail for noise-sensitive loads

Enable control (active-high, referenced to the output) lets the system power-cycle the rail without a series FET. Protection features include over-current and over-temperature shutdown. Quiescent current sits at 0.7 mA typical, rising to 1.8 mA max under heavy load — reasonable for a 1 A linear part in always-on industrial or telecom equipment.

Housed in a TO-263-6 / D²Pak (5 leads plus tab) surface-mount package, the REG104FA-2.5KTTTG3 is the DDPAK/TO-263-5 variant. The exposed tab is the output (VOUT) and provides the primary thermal path.

No LTB window or PCN risk is flagged.

Frequently asked questions

Is REG104FA-2.5KTTTG3 a drop-in replacement for REG104FA-2.5?

The REG104FA-2.5KTTTG3 is the Tape & Reel packaged variant of the same die. The base part number REG104FA-2.5 in a tube or tray package is functionally identical — same fixed 2.5 V output, same 1 A rating, same PSRR. Verify the package code (KTTT = DDPAK/TO-263-5) matches your board footprint and the reel quantity suits your pick-and-place setup.

What is REG104FA-2.5KTTTG3's PSRR?

The PSRR is 65 dB at 120 Hz. That is the line-frequency rejection figure — adequate for a clean 2.5 V rail feeding analog or mixed-signal loads from a rectified supply.

What package does REG104FA-2.5KTTTG3 come in?

It ships in Tape & Reel (TR) or Cut Tape (CT) format. The device package is TO-263-6 / D²Pak (5 leads plus tab), also designated DDPAK/TO-263-5. The exposed tab is the output and must be soldered for thermal management at 1 A.