The ST1S31PUR is a highly efficient, monolithic synchronous step-down switching regulator produced by STMicroelectronics. This compact and robust integrated circuit is designed to deliver a constant, stable output voltage with high power efficiency, making it an ideal solution for a wide range of applications, including consumer electronics, telecommunications, and industrial systems.

Key Features

• Input Voltage Range: The device supports a wide input voltage range from 4.0V to 18V, accommodating various power supply requirements.
• Adjustable Output Voltage: Users can set the output voltage from 0.8V to VIN, ensuring flexibility across different applications.
• High Efficiency: The ST1S31PUR offers high efficiency, typically up to 95%, which minimizes energy loss and heat generation.
• High Switching Frequency: With a 1.5MHz fixed switching frequency, the regulator allows the use of small surface-mount inductors and capacitors, reducing the overall solution size.
• Current Mode Control: This feature provides fast transient response and excellent line and load regulation.
• Protection Features: The device includes thermal shutdown and current limiting to protect the circuit under extreme conditions.
• Low Dropout Operation: It is capable of 100% duty cycle operation, providing low dropout performance.

Applications

The ST1S31PUR is versatile and can be used in a variety of applications, such as:

• Portable and battery-powered devices
• Networking and telecom equipment
• Consumer electronics like set-top boxes and LCD TVs
• Industrial and medical equipment

Package and Availability

The ST1S31PUR is available in a small 3x3 mm DFN6 (Dual Flat No-lead) package, which is ideal for space-constrained applications. The product is available for order from STMicroelectronics and its authorized distributors, ensuring easy accessibility for designers and manufacturers.

With its advanced features, the ST1S31PUR provides a reliable and efficient power supply solution that meets the demands of modern electronic devices.