PMIC - Voltage Regulators - DC DC Switching Regulators

The SC4524ESETRT is a monolithic, step-down dc-to-dc power converter. It is a highly efficient, integrated, high-powered switch-mode voltage regulator. The device has an input voltage range of 4.5V to 18V and can provide regulated outputs of 1.5V to 15V with up to 2.5A. This regulator is designed for applications where a low-noise supply is required, but does not require ultra low dropout. The feature rich SC4524ESETRT offers a full range of safety protection features to protect the device from hazardous conditions. It is designed to be highly efficient switching regulators, capable of delivering up to 90% efficiency with low quiescent current.

Application Fields

The SC4524ESETRT is most commonly found in high-level switch-mode power applications. Thanks to its high efficiency, it can be used in low-noise power designs that require an extremely low output voltage ripple. Its wide input voltage range makes it suitable for use in automotive, industrial and home applications, where high voltage input is required. Furthermore, its current limit protection and over-temperature protection makes it suitable for safety-critical applications, where the device is exposed to potentially hazardous conditions. Furthermore, its high switching frequency and soft-start feature make it suitable for applications that require low-noise, low-profile package, such as mobile and wearable electronics.

Working Principle

The SC4524ESETRT voltage regulator uses a synchronous switching technique. It has two main components, an internal P-channel MOSFET (internal switch) and a driver circuit. The driver circuit switches the internal switch on and off according to the input voltage and output voltage, providing optimum control over the output voltage. This enables the device to offer high efficiency, low output ripple, and fast transient response. The minimum on time of the internal switch is designed to provide smooth current flow, reducing output voltage ringing. Furthermore, the device also has an on-chip thermal protection feature, allowing it to shutoff in case of over-temperature.

In addition to the above features, the SC4524ESETRT also provides an adjustable soft-start, current limit, and over-voltage protection. The adjustable soft-start eliminates inrush current surges, helping to reduce overall system power consumption. The current limit feature helps to prevent over-current conditions, while the over-voltage protection prevents the device from outputting too high of voltages.

Conclusion

The SC4524ESETRT is a highly versatile, high-efficiency dc-to-dc power converter. It is suitable for a wide-range of applications due to its wide input voltage range, adjustable soft-start, current limit, and over-voltage protection features. Furthermore, it provides excellent performance with high efficiency and low output ripple, making it suitable for applications that require low-noise power designs.