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STMicroelectronics LD1117DT18TR — Power Management (PMIC / Gate Driver)

STMicroelectronics LD1117DT18TR LDO Regulator, 1.8V Fixed

MPNLD1117DT18TR
Active

STMicroelectronics LD1117 series, LD1117DT18TR, Positive Fixed 1.8V LDO Regulator, 800mA Output, 15V Input Max, 1.2V Dropout Max, 75dB PSRR at 120Hz, DPAK, 0°C to 125°C.

$0.8100Ref. price · indicative, final on quote
STMicroelectronics LD1117DT18TR 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

LD1117DT18TR specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input15V
Voltage dropout1.2V @ 800mA
Voltage - output (Min (Fixed))1.8V
Output current800mA
Current - quiescent10 mA
Operating temperature0°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

Fixed 1.8V rail, 800mA capacity

The STMicroelectronics LD1117DT18TR is a positive fixed-output LDO regulator delivering a regulated 1.8V rail at up to 800mA. Maximum dropout sits at 1.2V at full load, so the input needs to stay above roughly 3.0V to maintain regulation — plan the upstream rail accordingly. The 75dB PSRR at 120Hz provides decent ripple rejection from rectified mains, useful when feeding analog or mixed-signal loads from an unregulated bulk supply.

The DPAK package with exposed tab conducts heat to the PCB copper.

Frequently asked questions

Is LD1117DT18TR in stock?

Buyers need immediate availability to avoid project delays or emergency sourcing.

What is the price of LD1117DT18TR?

Price determines budget fit and can influence supplier choice.

What is the output voltage of LD1117DT18TR?

Output voltage is the primary spec for matching circuit requirements.

What is the dropout voltage of LD1117DT18TR?

Dropout voltage affects headroom and efficiency in low-voltage designs.

Is LD1117DT18TR obsolete or active?

Lifecycle status determines long-term availability and risk of redesign.

What are the equivalent or alternative parts for LD1117DT18TR?

Alternatives provide backup options if the original is unavailable or too costly.