LD1117S33C

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LD1117S33C

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LDO Voltage Regulators

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Description

The LD1117S33C is a low-dropout (LDO) linear voltage regulator designed to provide a stable output voltage with a low input-to-output voltage differential. It is manufactured by STMicroelectronics and is part of the LD1117 series. The "33" in its name indicates that it outputs a fixed 3.3V, making it ideal for applications requiring this specific voltage level.
Key features of the LD1117S33C include a maximum output current of 800 mA and a dropout voltage of approximately 1.1V at full load, which is relatively low compared to traditional voltage regulators. This makes it suitable for battery-powered devices where efficiency is critical. It also includes internal current and thermal limiting to protect against overload conditions.
The LD1117S33C comes in various package options, including SOT-223, DPAK, and TO-220, ensuring versatility in different design requirements. Its ease of use, reliability, and performance in maintaining a stable output make it a popular choice in consumer electronics, industrial applications, and embedded systems.

Equivalent

The LD1117S33C is a 3.3V low dropout voltage regulator. Equivalent products include:
1. AMS1117-3.3 from Advanced Monolithic Systems.
2. LM1117-3.3 from Texas Instruments.
3. NCP1117-3.3 from ON Semiconductor.
4. MIC29300-3.3WT from Microchip Technology.
5. AP1117-3.3 from Diodes Incorporated.
These alternatives generally offer similar functionality but may vary in specific features like dropout voltage, package types, and thermal characteristics. Always review datasheets to ensure compatibility.

Features

The LD1117S33C is a low-dropout (LDO) linear voltage regulator. Key features include:
1. Output Voltage: Fixed output voltage of 3.3V.
2. Input Voltage Range: Typically operates with an input voltage range of 4.75V to 15V.
3. Output Current: Can deliver up to 800mA of output current.
4. Dropout Voltage: Low dropout voltage around 1.1V at full load.
5. Thermal Protection: Built-in over-temperature protection ensures the regulator does not overheat.
6. Short-Circuit Protection: Includes a current limiting feature to protect against short circuits.
7. Stability: Requires external capacitors for stability, typically a 10μF tantalum or a 22μF electrolytic capacitor on the output.
8. Package Options: Available in various package options for different applications, including SOT-223.
9. Low Ground Current: Designed to operate with minimal ground current, making it efficient in power-sensitive applications.
10. Applications: Commonly used in battery-powered devices, microcontroller power supplies, and other low-voltage applications.
These features make the LD1117S33C suitable for a wide range of electronic applications requiring stable and reliable voltage regulation.

Pinout

The LD1117S33C is a low-dropout (LDO) linear voltage regulator. It typically comes in a SOT-223 package and has 3 pins. The pin functions are as follows:
1. Pin 1 (GND): This is the ground pin, serving as the reference point and return path for the current.
2. Pin 2 (V_OUT): This pin provides the regulated output voltage, which is 3.3V for the LD1117S33C variant.
3. Pin 3 (V_IN): This is the input pin where the unregulated voltage is supplied. The input voltage must be higher than the output voltage plus the dropout voltage for proper regulation.
Additionally, there may be a tab connected to Pin 2 (V_OUT) for thermal dissipation. The LD1117S33C is commonly used in applications requiring a stable 3.3V supply, with a dropout voltage around 1.2V at full load. It is important to ensure proper heat dissipation and input-output voltage differential for optimal performance.

Manufacturer

The LD1117S33C is manufactured by STMicroelectronics. STMicroelectronics is a multinational electronics and semiconductor company that designs, develops, manufactures, and markets a range of integrated circuits and discrete devices used in microelectronics applications. Headquartered in Geneva, Switzerland, it is one of the largest semiconductor companies in the world, serving various sectors including industrial, automotive, personal electronics, and communications equipment.

Application

The LD1117S33C is a low-dropout (LDO) voltage regulator commonly used in various electronics applications. Its primary application areas include:
1. Consumer Electronics: Provides stable voltage for devices like smartphones, tablets, and laptops.
2. Communication Equipment: Ensures reliable power supply for routers, modems, and other networking devices.
3. Industrial Equipment: Powers sensors and controllers with consistent voltage in industrial automation.
4. Computing: Stabilizes voltage for microcontrollers and processors in computers and servers.
5. Automotive: Supports power management in infotainment systems and control modules.
Its low dropout voltage and high current capability make it suitable for applications requiring efficient power management.

Package

The LD1117S33C is typically available in a SOT-223 package type, which is a surface-mount package used for voltage regulators and similar components.

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