STMicroelectronics

LD1117DTR

LD1117DTR Description

The LD1117DTR is a linear positive adjustable voltage regulator designed by STMicroelectronics, a leading manufacturer in the semiconductor industry. This device offers a wide input voltage range up to 15V and is capable of delivering a maximum output current of 800mA. The regulator features an adjustable output voltage starting from 1.25V, making it highly versatile for various applications. It is housed in a surface-mount 8SOIC package, which is ideal for compact and space-constrained designs.

LD1117DTR Features

• Adjustable Output Voltage: The LD1117DTR provides an adjustable output voltage range from 1.25V to 15V, allowing for flexibility in power supply design.
• High Output Current: With a maximum output current of 800mA, this regulator can efficiently power a wide range of electronic devices.
• Low Dropout Voltage: The maximum dropout voltage of 1.2V at 800mA ensures high efficiency even at low input-to-output voltage differentials.
• Over Current and Over Temperature Protection: These protection features safeguard the regulator and connected components from damage due to excessive current or temperature.
• Low Quiescent Current: The regulator operates with a low quiescent current of 5mA, which is beneficial for battery-powered applications.
• High PSRR: The power supply rejection ratio (PSRR) of 75dB at 120Hz ensures excellent noise filtering, resulting in a stable output voltage.
• Wide Operating Temperature Range: The operating temperature range of 0°C to 125°C makes the LD1117DTR suitable for both commercial and industrial applications.
• Compliance: The regulator is REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory adherence.

LD1117DTR Applications

The LD1117DTR is ideal for a variety of applications due to its adjustable output voltage and high output current capabilities. Some specific use cases include:

• Consumer Electronics: Ideal for powering portable devices, smartphones, and tablets where adjustable voltage and high current are required.
• Industrial Control Systems: Suitable for powering sensors, actuators, and microcontrollers in industrial environments.
• Automotive Electronics: Can be used in automotive applications where a wide input voltage range and high reliability are essential.
• Telecommunications: Effective in powering communication modules and base stations that require stable and adjustable power supplies.
• Medical Devices: Applicable in medical equipment where precise voltage regulation and low noise are critical.

Conclusion of LD1117DTR

The LD1117DTR by STMicroelectronics is a robust and versatile linear voltage regulator that offers adjustable output voltage and high output current capabilities. Its low dropout voltage, over current and over temperature protection, and high PSRR make it an excellent choice for a wide range of applications. Despite being marked as obsolete, the LD1117DTR remains a reliable option for designers seeking a high-performance regulator in a compact surface-mount package.