STMicroelectronics L5973D013TR Overview

The STMicroelectronics L5973D013TR is a versatile and highly efficient step-down (buck) voltage regulator, designed for use in applications that require stable, low-noise, and energy-efficient power conversion. It is particularly well-suited for applications in industrial electronics, consumer devices, and embedded systems where high efficiency and small form factor are crucial. The device features an integrated 3A step-down DC-DC converter with a wide input voltage range, making it ideal for powering various electronic circuits from high-voltage sources.

The L5973D013TR is designed with an emphasis on low power consumption, compact design, and high performance, ensuring that it provides reliable and consistent power to sensitive systems while keeping the size and energy footprint to a minimum. Its flexibility and high efficiency make it an excellent choice for a wide range of applications that require reliable and stable voltage regulation.

Key Features

* 3A Output Current: The L5973D013TR can provide up to 3A of continuous output current, which makes it suitable for driving a wide range of analog and digital circuits, motors, or other loads requiring high current capabilities.

* Wide Input Voltage Range: The device operates with a wide input voltage range from 4.5V to 40V, which allows it to be used with a variety of power sources, including batteries, power supplies, and other high-voltage inputs, making it versatile in a wide range of applications.

* Adjustable Output Voltage: The L5973D013TR provides an adjustable output voltage that can be set using an external resistor divider, which allows for flexible use in systems requiring specific output voltages. The output voltage range can be set from 0.8V to 15V.

* High Efficiency: With an efficiency of up to 93%, the L5973D013TR is designed to minimize power loss and heat generation, making it highly efficient and suitable for applications where heat dissipation and energy consumption are critical factors.

* Low Quiescent Current: The device features a low quiescent current of 30µA in burst mode, allowing for minimal power consumption when the load is light, which is especially useful in battery-powered or energy-sensitive applications.

* Integrated Protection Features: The L5973D013TR comes with built-in protection features, such as thermal shutdown, current limiting, and over-voltage protection, ensuring that the device operates safely and reliably even under adverse conditions. These features help protect both the regulator and the connected load.

* Small Package: The device is available in a compact, thermally efficient PowerSO-10 package, which is ideal for space-constrained applications. The small size of the package enables efficient integration into compact designs without sacrificing performance.

* Switching Frequency: The L5973D013TR operates at a fixed switching frequency of 340 kHz, which helps to reduce external component count and simplify the design, while ensuring stable operation and low ripple at the output.

Specifications

* Output Voltage: Adjustable from 0.8V to 15V (using external resistors)
* Output Current: Up to 3A (continuous)
* Input Voltage Range: 4.5V to 40V
* Efficiency: Up to 93%
* Quiescent Current: 30µA (typical) in burst mode
* Switching Frequency: 340 kHz (fixed)
* Output Voltage Ripple: Low ripple due to integrated high-frequency operation
* Operating Temperature Range: -40°C to +125°C
* Thermal Shutdown: Yes, integrated
* Current Limiting: Yes, integrated
* Over-Voltage Protection: Yes, integrated
* Package Type: PowerSO-10
* Power Loss: Low power loss due to high efficiency
* Applications: Suitable for both analog and digital load power requirements

Applications

* Power Supplies for Embedded Systems: The L5973D013TR is commonly used in embedded systems, providing stable power to microcontrollers, sensors, and other components. Its high efficiency and low quiescent current make it ideal for battery-powered embedded systems.

* Industrial Power Management: In industrial applications, the L5973D013TR can be used to power devices that require precise voltage regulation, such as industrial sensors, controllers, and motor drivers. The wide input voltage range and integrated protection features make it robust and reliable for industrial environments.

* Automotive Electronics: Due to its wide input voltage range (up to 40V), the L5973D013TR is well-suited for automotive applications where the power supply voltage can fluctuate between 12V to 40V. It is used for powering onboard systems such as GPS, infotainment units, and other automotive electronics.

* Consumer Electronics: The L5973D013TR is used in consumer electronics for powering digital and analog circuits in portable devices, home appliances, and audio equipment. The compact package and energy-efficient operation make it ideal for consumer applications requiring high reliability.

* Battery-Powered Applications: The low quiescent current of the L5973D013TR allows it to be used in battery-powered devices where power consumption is crucial. It can be used to efficiently step down voltage from high voltage sources to power battery-operated devices, reducing battery drain and extending battery life.

* Point-of-Load Regulation: This voltage regulator is also used for point-of-load (POL) applications where precise and efficient power regulation is needed for processors, FPGAs, and ASICs, which require stable and clean power sources.

Advantages

* High Efficiency: The L5973D013TR offers up to 93% efficiency, ensuring minimal heat generation and power loss, which is especially useful in energy-sensitive applications and systems where heat dissipation is a concern.

* Wide Input Voltage Range: With an input range of 4.5V to 40V, the device can be used with various power sources, including batteries, industrial power supplies, and automotive systems. This makes it highly versatile for multiple applications.

* Low Quiescent Current: The low quiescent current ensures that the regulator consumes very little power when the load is light or in standby mode. This is essential for low-power or battery-powered applications.

* Compact Form Factor: The PowerSO-10 package allows for efficient integration into space-constrained designs, making it suitable for applications where board space is limited.

* Integrated Protection Features: Thermal shutdown, current limiting, and over-voltage protection ensure that the device operates reliably and safely under a variety of conditions, providing peace of mind for designers and system integrators.

* Flexible Output Voltage: The ability to adjust the output voltage from 0.8V to 15V allows the L5973D013TR to be used in a wide range of voltage-sensitive applications, making it adaptable for different system requirements.

Conclusion

The STMicroelectronics L5973D013TR is a highly efficient and reliable step-down voltage regulator that offers a wide input voltage range, adjustable output voltage, and integrated protection features. With its low quiescent current, high efficiency, and robust design, it is well-suited for a variety of applications, including embedded systems, industrial power management, automotive electronics, and battery-powered devices. Its compact package and ability to handle high output currents make it an excellent choice for systems requiring stable, low-noise, and efficient power conversion. Whether for consumer electronics, industrial control, or automotive systems, the L5973D013TR provides reliable and energy-efficient power regulation.