LM1117DTX-ADJ

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LM1117DTX-ADJ

IC REG LINEAR ADJ POS LDO REG

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Vue d'ensemble

Description

The LM1117DTX-ADJ is a voltage regulator from Texas Instruments, designed to provide a stable output voltage for various electronic applications. This device is an adjustable version of the LM1117 series and can deliver up to 800 mA of output current. It offers a wide input voltage range and allows the output voltage to be set using two external resistors, making it highly versatile for different applications.
Key features include a dropout voltage of approximately 1.2V at full load, which makes it suitable for low-voltage applications, and a typical output voltage tolerance of ±1%. The LM1117DTX-ADJ also includes internal current limiting, thermal shutdown, and safe area compensation to ensure reliability and protection against overcurrent conditions.
In terms of packaging, the LM1117DTX-ADJ is typically available in a DPAK/TO-252 package, providing a compact footprint suitable for space-constrained designs. Its ease of use, reliability, and precise voltage regulation make it a popular choice for powering microcontrollers, sensors, and other components in consumer electronics, industrial controls, and telecommunications equipment.

Features

The LM1117DTX-ADJ is a versatile low dropout voltage regulator designed to provide a steady output voltage. Key features include:
1. Adjustable Output Voltage: The output voltage can be set to any desired level between 1.25V and 13.8V using external resistors.

2. Low Dropout Voltage: It has a dropout voltage of approximately 1.2V at 800mA of load current, allowing efficient voltage regulation.
3. Maximum Output Current: Capable of providing up to 800mA of output current, suitable for various applications.
4. Thermal Protection: Includes built-in thermal shutdown to prevent overheating and ensure safe operation.
5. Overcurrent Protection: Equipped with current limiting to safeguard against excessive load conditions.
6. Accuracy: Ensures an output voltage accuracy of ±1% (typical) across load and temperature variations.
7. Package Options: Available in a TO-252 surface-mount package, offering a compact form factor for modern designs.
These features make the LM1117DTX-ADJ suitable for applications requiring stable voltage under varying load conditions, such as in microprocessor supplies, battery chargers, and other electronic devices.

Package

The LM1117DTX-ADJ is a low-dropout voltage regulator provided in a TO-252 package, also known as DPAK. This package type is designed for surface mounting, offering efficient heat dissipation and compact size, making it suitable for various applications in electronics where space is limited.

Pinout

The LM1117DTX-ADJ is a low-dropout linear voltage regulator with an adjustable output. It typically comes in a surface-mount package like the SOT-223, which has a total of 4 pins:
1. Adjust (Adj): This pin is used to set the output voltage by connecting it to a resistor divider network. The resistor values determine the output voltage according to the formula \( V_{out} = V_{ref} \times (1 + \frac{R2}{R1}) + I_{adj} \times R2 \), where \( V_{ref} \) is typically 1.25V.
2. Output (Out): This pin delivers the regulated output voltage. The output voltage can be adjusted using the Adj pin.
3. Input (In): This pin is connected to the unregulated input voltage source. It should be higher than the desired output voltage to maintain regulation.
4. Tab/Ground (Tab/GND): The tab on the SOT-223 package functions as a ground connection and is crucial for heat dissipation. It should be connected to the ground plane of the circuit.
The LM1117DTX-ADJ is widely used in applications that require a stable and adjustable voltage supply with low dropout characteristics.

Manufacturer

The LM1117DTX-ADJ is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of electronic components, including integrated circuits and analog technologies. It serves a variety of industries, such as automotive, industrial, personal electronics, and communications, providing solutions that enable electronics to be smarter and more efficient.

Application

The LM1117DTX-ADJ is a versatile adjustable voltage regulator used primarily in applications requiring a stable and adjustable power supply. Its application areas include powering microcontrollers, microprocessors, and other digital circuits, providing a stable output for communication devices, powering sensors and analog circuits, and being used in battery-powered devices for voltage regulation. It's also commonly utilized in consumer electronics, industrial equipment, and embedded systems requiring efficient voltage conversion and regulation.

Equivalent

The LM1117DTX-ADJ is a low-dropout linear voltage regulator. Equivalent products include:
1. AMS1117-ADJ
2. MIC39100-1.2BU
3. LD1117-ADJ
4. NCP1117-ADJ
5. TLV1117-33CDCY
Ensure pin configurations and electrical characteristics match your application before substituting.

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