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Texas Instruments LM2940T-10.0 — Analog & Data Acquisition

Texas Instruments LM2940T-10.0 LDO Regulator, 10V Fixed, 1A

MPNLM2940T-10.0
NRND

Texas Instruments LM2940T-10.0, 10V fixed-output LDO regulator, 1A output, 1V dropout at 1A, PSRR 63dB at 120Hz, -40°C to 125°C, TO-220-3 through-hole package, NRND lifecycle.

$2.7000Ref. price · indicative, final on quote
Texas Instruments LM2940T-10.0 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM2940T-10.0 specifications
ParameterValue
Output typeFixed
MountingThrough Hole
Voltage - input26V
Voltage dropout1V @ 1A
Voltage - output (Min (Fixed))10V
Output current1A
Current - supply15 mA
Current - quiescent10 mA
Operating temperature-40°C~125°C
PSRR63dB (120Hz)
PackageTube
CaseTO-220-3
Protection featuresOver Current, Over Temperature, Reverse Polarity, Short Circuit
Number of regulators1
Output configurationPositive

Product details

It delivers 1 A continuous output with a maximum dropout of 1 V at full load, meaning the input rail must stay above 11 V to maintain regulation.

PSRR and ripple rejection — why 63 dB at 120 Hz matters

The PSRR is 63 dB at 120 Hz, which is the fundamental ripple frequency from a full-wave rectified AC line. This rating tells you the regulator attenuates 120 Hz ripple by a factor of roughly 1400, making it a good fit for post-rectifier linear regulation in audio preamps, analog sensor supplies, or any rail that needs clean DC from a raw rectified source.

Built-in protection covers over-current, over-temperature, reverse polarity, and short-circuit conditions.

This means TI is not actively supporting new design-ins, though the part may still be available through distribution and independent channels for existing production runs. For new designs, TI's official recommendation is to evaluate a current-production alternative within the LM2940 family or a different TI LDO series.

Frequently asked questions

Is the LM2940T-10.0 obsolete or still available for purchase?

It is not formally discontinued, but TI advises against using it in new designs. It remains available through independent distribution channels for existing production and repair needs.

What can replace the LM2940T-10.0 for new designs?

Texas Instruments does not list an official direct successor for the LM2940T-10.0. For new designs, evaluate current-production fixed-output LDOs from TI's portfolio that match the 10 V output, 1 A capability, and TO-220 package. The LM2940 family includes other voltage options that may be pin-compatible, but no drop-in replacement is specified.