LD1117-3.3

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LD1117-3.3

+BOM

IC REG LINEAR 3.3V 1A SOT-223-3L

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Specifications

Attribute Value
Part Status Active
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 12V
Voltage - Output (Min / Fixed) 3.3V
Voltage Dropout (Max) 1.3V @ 1A
Current - Output 1A
Current - Quiescent (Iq) 10 mA
PSRR 75dB (120Hz)
Control Features Current Limit
Protection Features Over Current, Over Temperature
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Supplier Device Package SOT-223-3L

Overview

Description

The LD1117-3.3 is a low-dropout (LDO) linear voltage regulator designed to provide a fixed 3.3V output from a higher voltage input, typically used in electronic circuits where precise voltage regulation is needed. It is part of the LD1117 family, which is known for its low dropout voltage, meaning it can maintain the output voltage close to the input voltage, minimizing power loss. The LD1117-3.3 can deliver up to 800mA of output current and features thermal and short-circuit protection, making it robust and reliable for various applications. It is commonly used in consumer electronics, communication devices, and computing equipment. The device is available in different package types, such as TO-220, SOT-223, and DPAK, making it versatile for various design requirements. Its simplicity, efficiency, and reliability make it a popular choice for powering microcontrollers, sensors, and other low-power digital circuits.

Equivalent

The LD1117-3.3 is a 3.3V low dropout voltage regulator. Equivalent products include:
1. LM1117-3.3 by Texas Instruments
2. MIC29302-3.3 by Microchip Technology
3. AMS1117-3.3 by Advanced Monolithic Systems
4. NCP1117-3.3 by ON Semiconductor
5. TLV1117-3.3 by Texas Instruments
These components offer similar voltage output and performance characteristics, suitable for applications requiring a 3.3V linear regulator. Always verify datasheet specifications for compatibility.

Features

The LD1117-3.3 is a voltage regulator, specifically a low-dropout (LDO) linear regulator, which provides a fixed output voltage of 3.3V. Here are its key features:
1. Output Voltage: 3.3V fixed output, suitable for powering 3.3V logic circuits and microcontrollers.
2. Input Voltage Range: Generally requires an input voltage of at least 4.3V to maintain proper regulation.
3. Low Dropout Voltage: Typically around 1.1V at maximum output current, allowing for efficient operation with closer input-output voltage levels.
4. Output Current: Capable of supplying up to 800mA of output current, sufficient for a wide range of applications.
5. Thermal Protection: Built-in thermal shutdown feature prevents damage from overheating.
6. Short-Circuit Protection: Protects against damage when the output is shorted.
7. Stability: Requires external capacitors for stability, typically a 10µF capacitor on the output.
8. Package Options: Available in various package types, such as TO-220, SOT-223, and DPAK, to suit different assembly needs.
9. Applications: Commonly used in consumer electronics, microprocessor power supply, and battery-powered devices.

Pinout

The LD1117-3.3 is a three-terminal linear voltage regulator. It has a pin count of three. The typical pin configuration is as follows:
1. Input (Vin): This pin is where the input voltage is supplied. It should be higher than the desired output voltage, typically a few volts more to ensure proper regulation.
2. Output (Vout): This pin provides the regulated output voltage, which is fixed at 3.3V for the LD1117-3.3 variant.
3. Ground (GND): This pin is connected to the ground of the circuit. It acts as a reference point for the input and output voltages.
The LD1117-3.3 is commonly used to regulate and provide a stable 3.3V output from a higher input voltage source, and it is often used in applications where a simple and reliable power supply is required.

Manufacturer

The LD1117-3.3 is manufactured by STMicroelectronics. STMicroelectronics is a multinational corporation and a leading semiconductor company, known for designing and manufacturing a wide range of semiconductor products and solutions. Headquartered in Geneva, Switzerland, the company operates globally, providing components and technologies for a variety of applications, including automotive, industrial, personal electronics, and communication equipment. Its product portfolio includes microcontrollers, sensors, power management devices, and more, catering to diverse market needs.

Application

The LD1117-3.3 is a low-dropout linear voltage regulator that provides a stable 3.3V output. Its application areas include:
1. Consumer Electronics: Powering microcontrollers and digital circuits in devices like smartphones and tablets.
2. Communication Devices: Ensuring stable voltage supply in modems, routers, and other networking equipment.
3. Embedded Systems: Used in development boards and IoT devices for reliable power.
4. Industrial Applications: Powering sensors and control units in automation systems.
5. Computer Peripherals: Powering components such as USB hubs, printers, and external storage devices.
6. Automotive: Used in infotainment systems and other electronics that require stable voltage.

Package

The LD1117-3.3 is typically available in a TO-220, SOT-223, or DPAK package type. These packages are designed for efficient heat dissipation and are commonly used for voltage regulators like the LD1117 series.

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