MP2351DK-LF-Z

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PMIC (Power Management Integrated Circuit) is a type of integrated circuit (IC) that is used to regulate and control the voltage and current of a system. DC DC Switching Regulators is an important type of PMIC as it is used to convert a fixed input voltage as a direct current (DC) output voltage that can be varied.

MP2351DK-LF-Z Application Field and Working Principle

The MP2351DK-LF-Z is a synchronous buck regulator (also known as Step-Down Regulator) designed for power supply application. It is available in the TO-252-5 package, which is specifically designed for surface mounting. Therefore, it is ideal for space-constrained applications. It has a Power Good signal and adjustable frequency, integrated synchronous rectifier, Hiccup Mode protection, and is available with a wide-input voltage range from 4.5V to 38V. Moreover, it has a 1.2MHz switching frequency which allows it to maintain high efficiency at low output voltages with minimizing the size of external components as well as high system throughput, and is capable of delivering up to 3A of load current.

The working principle of the MP2351DK-LF-Z is straightforward. It accepts a fixed input voltage and can produce a direct current (DC) output voltage that can be varied. It starts by the input voltage being applied to the VIN input. The voltage is then sent through the Input Capacitor filter and thereafter to the switching section. The switching section contains the Control Block and the High-Side and Low-Side Drivers. The switching frequency is determined by the resistor connected between the EN and FB pins which sets the oscillator frequency. The drivers control the MOSFETs at the switching frequency and under Control Block\'s instruction. The output voltage is regulated to the required value by comparing feedback voltage from FB pin with the internal reference voltage and settings from the EN pin. The Power Good signal (PG) will go low when the output voltage changes randomly by more than 10% for more than 200us due to output power instability and under-voltage or over-voltage conditions. The regulator delivers an output current of up to 3A which will increase the efficiency of the entire system.

The MP2351DK-LF-Z is suitable for a wide range of applications, including but not limited to, Industrial, Communications, Automotive electronics and LED Lighting. Furthermore, it is ideal for voltage regulation in 5V or 12V power supply circuits due to the wide operating voltage range of 4.5V to 38V.

To conclude, the MP2351DK-LF-Z is a high efficiency synchronous buck regulator that is capable of delivering up to 3A of load current and its wide operating voltage range makes it perfect for a variety of applications. It is also highly beneficial in terms of size as it is available in the TO-252-5 package, allowing it to be surface mounted and therefore occupy less space.

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