S-8355Q51MC-OXKT2G

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This article will explore the PMIC – Voltage Regulators – DC DC Switching Controllers application field and working principle of S-8355Q51MC-OXKT2G.

Overview

The S-8355Q51MC-OXKT2G is a compact, high-efficiency, precision DC-DC switching controller, with a wide voltage range covering up to 50V. It provides accurate output voltage regulation, controlling voltage feedback independently and ensuring fast transient response. The device has excellent low-noise characteristics, providing ultra-low switching noise, minimizing switching distortion, and allowing for noise-sensitive applications. The device also has a wide range of operating temperatures, offering greater flexibility in operating temperature ranges and improving device durability in a wide variety of applications.

Applications

The S-8355Q51MC-OXKT2G is ideal for a range of power management applications. It is often used for Point-of-Load (PoL) and Universal Serial Bus (USB) power adapter designs, power inverters, power converters and other DC/DC converters. It is also suitable for automotive applications, with its built-in warm-startover-voltage protection, thermal protection and integrated transient-overvoltage protection.

The device is designed for low-noise, high-efficiency applications, providing precise voltage regulation and helping to reduce system-level EMI generated by switching converters. This makes the device suitable for high-speed data communications, industrial, and process control applications.

Key features

• Wide voltage range, up to 50V
• Accurate output voltage regulation
• Fast transient response
• Low-noise characteristics
• Wide operating temperature range
• Built-in over-voltage protection
• Thermal protection
• Integrated transient-overvoltage protection

Working principle

The S-8355Q51MC-OXKT2G is a DC-DC switching controller with a pulse width modulation (PWM) control scheme. The device uses a single control loop to regulate the output voltage of the switch-mode power converter. The voltage feedback loop uses signals from a resistor ladder network to get the actively derived output voltage. At the same time, a correction term is applied to the calculation of the current set-point.

The voltage output is determined by the external components, such as the feedback resistor, resistor divider, compensation capacitor and inductor. The device offers up to eight output pins, including the FB pin, which is used to measure the output voltage by the voltage divider, and the CS pin, which is used to control the output voltage. Different pins can also be used for pulse skipping and system load protection.

The S-8355Q51MC-OXKT2G device is designed to be safe, efficient and compatible with a wide range of power supplies. The device has an over-temperature protection feature, which will automatically shut down the device if it reaches an over-temperature threshold. The device also has built-in voltage protection, allowing it to prevent over-voltage conditions. The device also includes integrated transient-overvoltage protection, which prevents transient voltages from causing damage to the system.

Conclusion

The S-8355Q51MC-OXKT2G DC-DC switching controller is a precise, high-efficiency, low-noise power management device. It is suitable for a wide range of applications, including automotive, industrial and communications, providing precise voltage regulation and precise transient response. The device also offers enhanced safety features and is compatible with a wide range of power supplies. The device is ideal for point-of-load, universal serial bus power adapter and power inverter designs.

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