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STMicroelectronics L4931CD33-TRY — Power Management (PMIC / Gate Driver)

STMicroelectronics L4931CD33-TRY LDO Regulator, 3.3V Fixed

MPNL4931CD33-TRY
End of Life

STMicroelectronics L4931CD33-TRY, Automotive AEC-Q100 series, positive fixed LDO regulator, 3.3V output, 250mA, 20V max input, dropout 0.82V max @ 250mA, PSRR 73dB ~ 55dB (120Hz ~ 10kHz), -40°C to 125°C, 8-SOIC package.

$1.64Ref. price · indicative, final on quote
STMicroelectronics L4931CD33-TRY datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
SeriesAutomotive, AEC-Q100
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

L4931CD33-TRY specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Output typeFixed
MountingSurface Mount
Voltage - input20V
Voltage dropout0.82V @ 250mA
Voltage - output (Min (Fixed))3.3V
Output current250mA
Current - supply6 mA
Current - quiescent1 mA
Operating temperature-40°C ~ 125°C
PSRR73dB ~ 55dB (120Hz ~ 10kHz)
PackageTape & Reel (TR); Cut Tape (CT)
Case8-SOIC (0.154\", 3.90mm Width)
Protection featuresOver Current, Over Temperature
Number of regulators1
Output configurationPositive

Product details

Fixed 3.3 V rail for automotive and industrial loads

The STMicroelectronics L4931CD33-TRY is a single-output positive fixed LDO regulator delivering 3.3 V at up to 250 mA.

Maximum dropout is 0.82 V at 250 mA.

Protection and quiescent draw

Over-current and over-temperature protection are built in. Quiescent current is 1 mA typical, supply current max 6 mA — the part is not a micropower LDO but the draw is acceptable for always-on modules in a vehicle where the ignition load is already several hundred milliamps.

No LTB or EOL notice on record. No official second-source cross-reference is listed, but the LD39020DTPU33R (200 mA, 5.5 V max input, similar PSRR profile) is a functional alternative if the load budget allows the lower current.

Frequently asked questions

Is L4931CD33-TRY automotive grade?

Yes, it is qualified to AEC-Q100 and belongs to the Automotive series.

What is the recommended replacement for L4931CD33-TRY if obsolete?

No official replacement is listed. For a functional alternative with lower output current, consider the LD39020DTPU33R (200 mA, 5.5 V max input).