What are the key specifications?

It provides a fixed 3.3V output at up to 1A, with a typical dropout voltage of 1.15V at 1A, 80dB supply voltage rejection, and a 0°C to 125°C operating temperature range.

What should engineers review before using this part?

Engineers should verify the thermal requirements of the SOT-223 package, ensure a minimum 10µF output capacitor is used for stability, and confirm the input voltage is sufficient to maintain regulation.

What is the primary application for this regulator?

It is widely used in power management circuits for industrial, consumer, and general electronic devices requiring a stable 3.3V rail.

What is the pinout of LD1117AS33TR?

Use the LD1117AS33TR datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about LD1117AS33TR pinout to locate pins, power rails, and interface signals before layout.

LD1117AS33TR Datasheet, Specs, Alternatives & ECAD | C&K

AI summary

The LD1117AS33TR is a reliable 3.3V, 1A LDO regulator from STMicroelectronics, ideal for general-purpose power management in space-constrained designs.

Best for

3.3V power rails
General purpose LDO applications

Avoid if

High dropout voltage is unacceptable
Extreme thermal environments exceeding 125°C

Check before use

Thermal dissipation requirements
Output capacitor ESR

Key specifications

Output Voltage: 3.3 V
Max Output Current: 1 A
Dropout Voltage: 1.15 V
Package: SOT-223

Compliance & Environment

RoHS: ROHS3 Compliant
REACH: REACH Affected
MSL: 1 (Unlimited)
ECCN: EAR99
HTSUS: 8538.90.8180

Application

Power ManagementIndustrial

Datasheet

37bdaa42ad763e39040174af13e06c62_2304140030_STMicroelectronics-LD1117AS33TR_C115288.pdf

800 KB

Datasheet AI

CAD Models

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Alternative components

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Design and risk insights

Questions & answers

It is a fixed 3.3V, 1A low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics, housed in a SOT-223 package.

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Where to Buy

Alternative components

Design and risk insights

Questions & answers

What is the LD1117AS33TR?+×

What are the key specifications?+×

What should engineers review before using this part?+×

What is the primary application for this regulator?+×

What is the pinout of LD1117AS33TR?+×