MP2358DQ-LF-Z

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PMIC - Voltage Regulators - DC DC Switching Regulators

The MP2358DQ-LF-Z is a DC DC switching regulator with very low quiescent current, low noise and fast transient response. It is designed to provide a reliable and cost-effective solution for mobile and embedded system applications.

It has a wide input voltage range, from 2.6V to 16V, which allows it to be used in a wide range of applications. It has a low shutdown current of only 10μA, which makes it suitable for battery-powered applications. The output voltage can be adjusted via two control pins, with a high accuracy of ±1.5%.

Application Field

The MP2358DQ-LF-Z can be used in various applications, such as portable audio devices, digital cameras, PDAs, smartphones, software radio systems, and other consumer electronics applications. It is ideal for low noise and low power applications, due to its low quiescent current and fast transient response. It is also suitable for step-up, boost, and buck-boost applications.

Working Principle

The MP2358DQ-LF-Z is a DC DC buck-boost synchronous converter for converting an input voltage to an adjustable output voltage. It consists of an internal voltage regulator, an internal MOSFET, and two feedback control pins for voltage loop compensation and output voltage adjustments. The voltage regulator comprises an operational amplifier and a current-sense amplifier, which are responsible for controlling the duty cycle of the internal MOSFET. The output voltage is generated through the voltage scaling of the output inductor\'s voltage ripple.

When the feedback voltage reaches the predetermined value, the internal MOSFET will be switch off, and the feedback voltage loop will be reset. During this reset period, the output voltage will rise, and the cycle will repeat. This process is known as "burst-mode", which is used to reduce the switching losses and provide a very low no-load power consumption. The MP2358DQ-LF-Z can also be used in discontinuous conduction mode (DCM) operation, which improves the efficiency and reduces power losses in light load conditions.

Conclusion

The MP2358DQ-LF-Z is a low quiescent current DC-DC switching regulator with a high accuracy of ±1.5%. It is suitable for various applications, such as portable audio devices, digital cameras, PDAs, and GSM/CDMA mobile phones. The MP2358DQ-LF-Z has a wide input voltage range, low shutdown current, and fast transient response, making it an ideal solution for embedded and mobile applications.

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