ST1S09PUR

PMIC - Voltage Regulators - DC DC Switching Regulators

The ST1S09PUR is a high-performance integrated DC-DC switching regulator that is ideal for applications that require a current of up to 3 amps and a wide input voltage range. It has an integrated synchronous rectifier and is capable of delivering high efficiency with minimal power dissipation. The ST1S09PUR is able to maintain tight load and line regulation, while providing excellent protection and noise suppression.

Application Field

The ST1S09PUR is designed to meet a wide variety of applications in power conversion and management. It is suitable for use in automotive, industrial, and consumer applications that require high performance and reliability. Some of the applications where the ST1S09PUR is used include aircraft systems, industrial automation, automotive, medical equipment, motor control, power tools, and robotics. It is also suitable for use in applications that require low noise and ripple, such as battery-charging, power amplifier supply, communication systems, and switching power supplies.

Working Principle

The ST1S09PUR is a switching regulator that uses Pulse Width Modulated (PWM) control to provide highly efficient power conversion. The regulator operates in PWM mode as long as the output voltage is higher than the reference voltage. When the output voltage drops below the reference voltage, the regulator switches to Pulse Frequency Modulated (PFM) mode. By switching between PWM and PFM modes, the ST1S09PUR is able to deliver stable output voltages with minimal power dissipation. In addition, the regulator is able to maintain tight load regulation and line regulation over the entire load range.

The ST1S09PUR uses a synchronous rectifier design to ensure high efficiency and low power dissipation. This is accomplished by synchronizing the converter\'s switching circuitry with the electrically isolated converter. The synchronous rectifier is able to provide minimal switch voltage drop and low on-state resistance, resulting in reduced power dissipation. In addition, the ST1S09PUR has built-in over current protection and thermal shutdown, which provide excellent protection. The device also includes low-noise EMI suppression circuitry for excellent noise performance.

The ST1S09PUR also includes built-in features to improve the performance and reliability of the system. It includes a voltage output tracking feature that keeps the output voltage stable by continuously adjusting the overload voltage as the load current varies. The regulator also comes with a built-in current limit that is adjustable from 0.5A to 3.25A. This feature helps protect the system from overloads, and it can also be used to prevent high-inrush currents.

Overall, the ST1S09PUR provides high performance and is suitable for a wide range of applications. With its high efficiency and low power dissipation, it is capable of producing high performance and reliable output voltages. The device\'s built-in current limit and over current protection features provide excellent protection and make the ST1S09PUR an ideal choice for applications that require high performance and reliability.