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Texas Instruments LP2950CZ-3.3/LFT1 — Analog & Data Acquisition

LP2950CZ-3.3/LFT1 LDO Regulator, 3.3V Fixed, 100mA, TO-92-3

MPNLP2950CZ-3.3/LFT1
Obsolete

Texas Instruments LP2950 series, Positive Fixed LDO Regulator, 3.3V output, 100mA, 0.6V dropout at full load, TO-226-3 / TO-92-3 through-hole package, -40°C to 125°C operating range.

Texas Instruments LP2950CZ-3.3/LFT1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LP2950CZ-3.3/LFT1 specifications
ParameterValue
Output typeFixed
MountingThrough Hole
Voltage - input30V
Voltage dropout0.6V @ 100mA
Voltage - output (Min (Fixed))3.3V
Output current100mA
Current - supply14 mA
Current - quiescent120 µA
Operating temperature-40°C~125°C
PackageBulk
CaseTO-226-3, TO-92-3 (TO-226AA)
Protection featuresOver Current, Over Temperature
Number of regulators1
Output configurationPositive

Product details

3.3V fixed rail for industrial and automotive boards

The LP2950CZ-3.3/LFT1 is a positive fixed-output LDO regulator delivering 3.3V at up to 100 mA. It's built for through-hole assembly in the TO-92-3 package, with a maximum dropout voltage of 0.6V at full load — enough headroom for a 5V rail to regulate cleanly down to 3.3V.

Dropout and quiescent current — sizing the rail

At 100 mA output the dropout is 0.6V max, so the input must stay above 3.9V to maintain regulation. Quiescent current is 120 µA typical, rising to 14 mA max under fault — the part includes over-current and over-temperature protection, so the supply budget should cover that peak. Input voltage can go up to 30V, which gives plenty of margin for a 12V or 24V industrial bus. The fixed 3.3V output means no external resistor divider — just the input cap and an output cap per the datasheet recommendation.

Obsolete — sourcing for repair and last-time buy

This part is listed as obsolete.

Frequently asked questions

Is LP2950CZ-3.3/LFT1 obsolete?

Yes, the LP2950CZ-3.3/LFT1 carries an obsolete lifecycle status. For repair or production continuity, we can source it to order through independent channels.

What is the replacement for LP2950CZ-3.3/LFT1?

No official replacement is listed by the manufacturer. A pin-compatible LDO in the same TO-92-3 package with a fixed 3.3V output and 100 mA rating would be the closest functional substitute — confirm the dropout and quiescent current match your design margin.