RT5047AGSP Integrated Circuits (ICs)

RT5047AGSP Application Field and Working Principle

PMIC (Power Management IC) Voltage Regulators - Special Purpose devices are increasingly used in consumer electronics and computing platforms. The RT5047AGSP is a powerful, unique solution that combines the functions of a power supply controller, a linear regulator, and a battery charger in one package. This paper will discuss the application field and working principles of the RT5047AGSP, as well as its features, benefits, and use cases.

Applications and Application Fields

The RT5047AGSP is a PMIC, providing high performance power management solutions in power sensitive applications such as portable electronics, automotive/industrial applications, and consumer electronics. Its features make it ideal for a broad range of higher voltage point of load (POL) applications, such as Notebook and PC CPUs and GPUs (graphics processing units). It also has features of interest for ultra-low power OLED display applications.

Features of the RT5047AGSP

The RT5047AGSP provides a wide input voltage range of 2.2V to 20V and a DC-DC output voltage range from 0.6V to 19V. It has integrated linear regulators, with adjustable output voltage range to support a multitude of different power and bias requirements. It also boasts a current fold-back capability and an integrated soft start control to reduce inrush current.

The RT5047AGSP also includes a power supply controller that provides a multi-phase solution that can increase power supply efficiency while providing faster transient response and current sharing capability. This enables support for higher current CPU power supplies and GPUS that have higher switching frequency requirements. In addition, it has an integrated boost controller to support common-mode noise suppression and transient switching.

Finally, the RT5047AGSP has an integrated battery charger that supports multiple charge profiles for various battery chemistries and two input power sources (AC or DC). The battery charger also tracks inputs from external charging sources which provides system designers with flexibility in managing power sources. This helps extend the lifetime of the battery by balancing charging with lower or higher input voltage.

Working Principles

The RT5047AGSP works by taking a source of power, such as a battery, and delivering it to the desired application over a range of voltages. To do this, it integrates several different components into one package.

The first component is a power supply controller that functions as the main controller of the RT5047AGSP. It converts input DC power into several intermediate DC voltages that can be used to power the different components of the system. Additionally, the power supply controller can be used to adjust the output voltage to fit the requirements of the device, as well as to provide current sharing and transient protection.

The second component is a linear regulator that takes the intermediate DC voltages and reduces them to the required voltage level. This provides stable output voltage over a range of changes in load conditions. The RT5047AGSP includes several different regulator stages that can be used to provide a range of different output voltages. It also includes a soft start control to reduce inrush current during power up.

Finally, the RT5047AGSP includes a battery charger to charge any externally connected battery using either AC or DC sources. It includes several charging profiles that can be used to support different battery chemistries, and also includes tracking of external charging sources, allowing the system to adjust charging accordingly.

Benefits and Use Cases

The RT5047AGSP provides an easy-to-implement solution for high current POL applications that previously used discrete solutions or inefficient multi-chip solutions. Its wide input voltage range and high output current capabilities are suitable for a variety of portable devices, automotive/industrial applications, and consumer electronics. It helps to reduce board size and power consumption in rugged or industrial applications, or in applications where weight and space restrictions are important.

It is also suitable for OLED display applications, as it provides a range of output voltages, a current fold-back feature, and an integrated boost controller to suppress noise and improve current transient speeds. This makes it an ideal choice for use in smartphones, tablets, and other portable electronics.