The ST1S40IDR is a highly efficient, monolithic synchronous step-down regulator that is designed to provide a compact and high-performance power solution. Manufactured by STMicroelectronics, a leader in semiconductor solutions, this regulator is capable of delivering up to 3 A of continuous current to loads with an input voltage range of 4 V to 18 V.

Key Features

• High Efficiency: With a synchronous rectification topology, the ST1S40IDR achieves high efficiency, which is critical for energy-saving in portable and industrial applications.
• Adjustable Output Voltage: The output voltage can be adjusted from 0.8 V to the input voltage, allowing for a wide range of applications and flexibility in design.
• High Switching Frequency: The device operates at a 850 kHz switching frequency, which allows for the use of small surface-mount inductors and capacitors, reducing space and cost.
• Thermal Shutdown and Overcurrent Protection: Built-in thermal shutdown and current limiting protect the device and the load from damage due to overheating or overload conditions.
• Power Save Mode: The ST1S40IDR features a power save mode that enhances efficiency at light loads, making it ideal for battery-powered applications.

Applications

The ST1S40IDR is suitable for a wide range of applications, particularly where high efficiency and compact size are required. Typical applications include:

• Portable devices
• Networking and telecom equipment
• Consumer electronics
• Industrial power supplies

Package and Availability

This regulator is available in a compact 8-pin VFDFPN package, which is optimized for space-constrained applications. The ST1S40IDR provides an excellent solution for designers looking to enhance the power efficiency and performance of their systems. It is available through STMicroelectronics' distributors and is supported by comprehensive technical documentation and design resources.