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STMicroelectronics L4931ABDT33-TR — DC-DC Power Modules

STMicroelectronics L4931ABDT33-TR LDO, 3.3V fixed, 250mA

MPNL4931ABDT33-TR
End of Life

STMicroelectronics L4931ABDT33-TR, linear voltage regulator, fixed 3.3V output, 250mA, 0.8V dropout max, PSRR 73dB~55dB (120Hz~10kHz), -40°C to 125°C, DPAK package, surface mount.

$1.7Ref. price · indicative, final on quote
STMicroelectronics L4931ABDT33-TR datasheet (PDF)
PackagingTO-252-3, DPak (2 Leads + Tab), SC-63
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

L4931ABDT33-TR specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input20V
Voltage dropout0.8V @ 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)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Protection featuresOver Current, Over Temperature
Number of regulators1
Output configurationPositive

Product details

This is moderate — acceptable for always-on automotive modules where the load current dominates, but not the lowest-Iq choice for battery-powered sensors that spend most of their time in sleep.

Protection and packaging for production

Built-in over-current and over-temperature protection allow the LDO to survive output shorts and thermal overload without external clamp diodes.

No official second-source alternate is recorded, but the 250mA fixed-3.3V LDO space includes parts such as the LD39020DTPU33R and LDFPVR, which differ in package, dropout, or feature set and should be evaluated for fit rather than assumed pin-compatible.

Frequently asked questions

Can L4931ABDT33-TR replace L4931ABDT33?

The L4931ABDT33-TR is the tape-and-reel variant of the same base device. Electrically it is identical to the L4931ABDT33; the only difference is the packaging format for automated assembly.