What are the key applications for this regulator?

It is commonly used in computer motherboards, LCD monitors, ADSL equipment, and as a post-regulator for switching power supplies.

What protection features are included?

The device includes integrated thermal shutdown and overcurrent protection to ensure system reliability.

What is the output accuracy?

The A1117-3.3 maintains an output voltage accuracy of ±2%.

What is the sourcing status?

The component is currently active and widely available through major distributors.

What is the pinout of A1117-3.3?

Use the A1117-3.3 datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about A1117-3.3 pinout to locate pins, power rails, and interface signals before layout.

A1117-3.3 Datasheet, Specs, Alternatives & ECAD | IDCHIP

AI summary

The IDCHIP A1117-3.3 is a reliable 1A fixed 3.3V LDO regulator in a SOT-223 package, ideal for general-purpose power regulation.

Best for

General purpose 3.3V power rails
Post-regulation for DC-DC converters

Avoid if

Applications requiring extremely low quiescent current
High-power designs without adequate PCB heat sinking

Check before use

Thermal design of the PCB
Input capacitor requirements

Key specifications

Output Voltage: 3.3 V
Max Current: 1 A
Dropout Voltage: 1.2 V
Accuracy: ±2%

Compliance & Environment

RoHS: Compliant
REACH: -
MSL: -
ECCN: -
HTSUS: -

Application

Power ManagementConsumer Electronics

Datasheet

08abe683cdd5fe5ae2ed21350ed7c9c4_2306251028_IDCHIP-A1117-3-3_C7432020.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for A1117-3.3: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

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PCB Footprint

Land pattern for PCB layout

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3D Model

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Where to Buy

Real-time and catalog pricing from verified distributors

Alternative components

Part	Details	Match
NCP1117ST33T3Gonsemi	A strong alternative from onsemi in the same package with matching key electrical parameters.	Needs validation

BL8072CLTR33Shanghai Belling	An upgrade path with higher current (2A), wider input voltage, and lower dropout in the same package.	Needs validation
CJT1117B-3.3Jiangsu Changjing Electronics Technology Co., Ltd.	A strong alternative from Jiangsu Changjing with matching package and slightly better dropout voltage.	Needs validation
ME6118A33B3GMICRONE	A functional alternative in the same package, but with a higher minimum input voltage.	Needs validation

Design and risk insights

Questions & answers

The A1117-3.3 is a three-terminal low-dropout (LDO) linear voltage regulator that provides a fixed 3.3V output with a maximum current capacity of 1A.

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 A1117-3.3?+×

What are the key applications for this regulator?+×

What protection features are included?+×

What is the output accuracy?+×

What is the sourcing status?+×

What is the pinout of A1117-3.3?+×