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STMicroelectronics LD1117DT18CTR — Analog & Data Acquisition

LD1117DT18CTR – STMicro 1.8V Fixed 800mA LDO, DPAK, Active

MPNLD1117DT18CTR
Active

STMicroelectronics LD1117 series, positive fixed 1.8V output LDO, 800mA, surface-mount DPAK (TO-252-3), active production.

$0.7700Ref. price · indicative, final on quote
STMicroelectronics LD1117DT18CTR datasheet (PDF)
PackagingTO-252-3, DPak (2 Leads + Tab), SC-63
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LD1117DT18CTR specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input15V
Voltage dropout1.3V @ 800mA
Voltage - output (Min (Fixed))1.8V
Output current800mA
Current - quiescent10 mA
Operating temperature-40°C ~ 125°C
PSRR75dB (120Hz)
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

Active production — 1.8V fixed LDO in DPAK

The LD1117DT18CTR is an STMicroelectronics positive fixed-output LDO delivering 1.8V at up to 800mA in a DPAK (TO-252-3) package. It carries an active lifecycle status, so no near-term EOL risk for production BOMs.

Maximum dropout is 1.3V at 800mA load — the input rail must stay above 3.1V to hold 1.8V regulation at full current. PSRR is 75dB at 120Hz, which attenuates 120Hz rectifier ripple by a factor of ~5600; useful for powering analog or RF stages from a lightly filtered supply.

Industrial temperature range and protection

Built-in over-current and over-temperature protection reduce the risk of failure under fault conditions.

ROHS3 compliant.

Frequently asked questions

Is LD1117DT18CTR pin compatible with LM1117?

The LD1117DT18CTR uses the standard DPAK (TO-252-3) pinout common to many 1117-family regulators. Pin compatibility with the LM1117 depends on the specific LM1117 variant — verify the pin assignment (GND, VOUT, VIN) against the LM1117 datasheet for your package.