S-8521B31MC-ATQT2G

The S-8521B31MC-ATQT2G application field and working principle is part of the DC DC Switching Controllers branch on PMIC Voltage Regulators. DC DC Switching Controllers allow for smooth, low noise transfer of power from sources such as batteries, AC adapters, and other input sources. It also allows for usage with various power management integrated circuit (PMIC) applications, such as voltage regulation, power sequencers, protection circuitry, and system monitoring.

The S-8521B31MC-ATQT2G is a DC DC Switching Controller developed by Ricoh, a Japanese electronics company. It features a logic compatible circuit and is equipped with overvoltage, short-circuit, overcurrent, thermal shutdown and overheat protection circuitry. It is designed for low on-state resistance applications with an output current of 2 amps and an input range of 4V-32V. It also features 2 selectable feedback resistors to enable both single and dual step output voltage operation.

Working Principle

The S-8521B31MC-ATQT2G DC DC Switching Controller operates using a fixed-frequency, pulse-width modulation (PWM) topology. Its core control functions include frequency setting, peak current control, and output voltage regulation. The circuit controller utilizes a voltage feedback and current loop to regulate its output voltage. When the voltage feedback value rises above the voltage set reference value, the proportional–integral–derivative (PID) current loop adjusts its output current to keep the output voltage within a desired range. Providing a stable PWM switching current, it utilizes the same current source for both the low and high-side switches, allowing for better current balance.

Application Areas

The S-8521B31MC-ATQT2G DC DC Switching Controller can be utilized in a variety of different applications. It is designed to support PMIC applications such as general power supplies, automotive power supplies, and industrial circuits. It can be used to power system monitor circuits, voltage regulators, power sequencers, protection circuits, and more. Its ability to provide low on-state resistance with a stable current output makes it an ideal solution to provide power to electronics with powerful and reliable performance.

In addition, it can also be used for the development and manufacturing of various power supplies for transport mount, handheld and portable devices. Its high-efficiency switching controller can provide a lower total-cost solution for reduced power consumption, longer life cycling and more power-suitable performance.

Conclusion

The S-8521B31MC-ATQT2G DC DC Switching Controller is a high-performance, low on-state resistance switch controller suitable for PMIC applications. It utilizes a fixed-frequency, pulse-width modulation (PWM) topology and features a variety of protective circuitry, such as overvoltage, short-circuit, overcurrent, thermal shutdown and overheat protection. It can be used to provide power to a number of different system applications, such as general power supplies, automotive power supplies, and industrial circuits. This makes it a great choice for further development and manufacturing of power supplies for portable, transportable, handheld and other suitable devices.