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STMicroelectronics LDBL20D-33R — DC-DC Power Modules

STMicroelectronics LDBL20D-33R LDO Regulator

MPNLDBL20D-33R
End of Life

STMicroelectronics LDBL20D-33R, LDO Voltage Regulator, Fixed 3.3V Output, 200mA, 40µA Quiescent Current, PSRR 80dB~55dB (1kHz~100kHz), Enable, Over Current/Over Temperature/Soft Start Protection, -40°C~125°C, 4-XFQFN Package, Surface Mount, ROHS3.

$1.14Ref. price · indicative, final on quote
STMicroelectronics LDBL20D-33R datasheet (PDF)
Packaging4-XFQFN
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LDBL20D-33R specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input5.5V
Voltage - output (Min (Fixed))3.3V
Output current200mA
Current - quiescent40 µA
Operating temperature-40°C ~ 125°C (TJ)
PSRR80dB ~ 55dB (1kHz ~ 100kHz)
PackageTape & Reel (TR); Cut Tape (CT)
Case4-XFQFN
Control featuresEnable
Protection featuresOver Current, Over Temperature, Soft Start
Number of regulators1
Output configurationPositive

Product details

Temperature grade and deployment environment

Rated for -40°C to 125°C junction temperature, this LDO is comfortable in automotive cabin or under-hood zones, outdoor telecom enclosures, and factory-floor sensor modules that see thermal cycling. The wide temp range also covers cold-crank and hot-soak conditions in vehicle electronics. No AEC-Q100 qualification is listed in the record, so if an automotive PPAP is required, verify the manufacturer's automotive-grade variant or request the specific qualification report.

Sourcing and lifecycle

ROHS3 compliant. For BOM planning, the active status means no supply discontinuity risk for new designs, and the part can be specified into production without qualification concerns.

Frequently asked questions

What is the quiescent current of LDBL20D-33R?

Quiescent current is 40 µA. This is the current the regulator consumes from the input pin when delivering no load — the key number for battery-powered or always-on applications where standby power matters.

Is LDBL20D-33R suitable for battery-powered applications?

Yes, the 40 µA quiescent current and 200mA output capacity make it a good fit for battery-powered sensor nodes, portable instruments, or any design where the regulator stays on continuously and needs to minimize drain on the battery.

What are the best alternatives to LDBL20D-33R if it is out of stock?

The STMicroelectronics LD39020DTPU33R is a close functional peer — same 3.3V fixed output, 200mA, similar PSRR (80dB to 55dB across 1kHz to 100kHz), same protection features, and same -40°C to 125°C temperature range. It shares the same 5.5V input max and 40 µA quiescent current profile. Pin compatibility should be verified against the respective datasheets, but it's the natural first cross-reference for dual-sourcing.