S-8353D20MC-IUFT2U

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Introduction

S-8353D20MC-IUFT2U is a highly integrated Direct-Current (DC) DC switching regulator designed for high performance computing, networking, and storage applications. This part is designed to provide efficient, reliable power solutions for systems needing a range of voltages with low ripple and good transient response. This device provides a wide range of operating voltages, with an output current of up to 60A, a maximum output power of 120W, and an efficiency of up to 90%.

Application Field

S-8353D20MC-IUFT2U is suitable for power applications ranging from a few watts up to 120W requiring supplies of 1.8V to 3.3V or 2.5V to 6V. It is an ideal choice for applications that require a wide range of voltages, high efficiency, fast transient response, and low output ripple and noise. With its low-profile, 20-pin QFN package, the part features low-output voltage drop and allows for smaller, lighter and more thermally-efficient power solutions for the latest generation of mobile devices and small-form-factor products.

The part is suitable for various applications such as network equipment, embedded systems, digital signal processors, mobile devices and industrial/ automotive systems. It can also be used in computing platforms, as well as a power controller in battery-powered equipment, on-board chargers, and auxiliary power supplies. S-8353D20MC-IUFT2U supports a wide variety of protocols, including PMBus, I2C, and Serial Interface.

Working Principle

The S-8353D20MC-IUFT2U is based on a DC-DC buck topology, with a synchronous rectifier to improve efficiency and minimize switching loss. The device regulates the output voltage using a voltage mode control scheme utilizing a voltage reference.

When the power switch (MOSFET) is turned on, the coil current increases linearly. The negative feedback loop monitors the output voltage, and terminates the on-time when the voltage reaches the desired value. The duty ratio is set dynamically by the error amplifier, in response to the load current and input voltage variations. The device supports two operating modes, pulse frequency modulation (PFM) and pulse width modulation (PWM).

In PWM mode, the output voltage can be adjusted over a wide range of voltages. The PFM mode is optimized for light loads, allowing greater efficiencies in these conditions. Furthermore, this device can be shut down by external control, allowing the system to enter a low-power mode and conserve energy.

Conclusion

S-8353D20MC-IUFT2U is an advanced DC-DC switching regulator designed for a wide range of applications. It provides a wide range of voltages with low ripple and good transient response, and is suitable for power applications ranging from a few watts to 120W. It features an integrated synchronous rectifier for improved efficiency and minimal switching losses, as well as two operating modes for optimal performance. Finally, with its low-profile, 20-pin QFN package, the device can provide smaller, lighter and more thermally-efficient power solutions for the latest generation of mobile devices and small-form-factor products.

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