MP1474DJ-LF-P

Voltage - Input (Max):	16V
Supplier Device Package:	TSOT-23-8
Package / Case:	SOT-23-8
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	500kHz
Current - Output:	2A
Voltage - Output (Max):	13V
Voltage - Output (Min/Fixed):	0.8V
Series:	--
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching Regulators

DC-DC switching regulators are a type of Power Management Integrated Circuit (PMIC) converter used in many types of power supply applications. The MP1474DJ-LF-P is a product from Monolithic Power Systems (MPS) that is a synchronous buck regulator that supports an input voltage input from 3 V to 16 V and generates an adjustable output voltage from 0.5 V to 5.5 V with a maximum continuous output current of 8 A. In this paper, the application field and working principle of the MP1474DJ-LF-P will be discussed.

Application field

The MP1474DJ-LF-P can be used in a variety of applications that require efficient energy management. Some of the common applications include powering digital ICs and memory solutions, battery powered devices, portable consumer products, and PCs, motherboards, printers, and servers. It is extremely versatile and is capable of implementing a wide variety of topologies, including a wide variety of output voltages, switching frequencies, and load current capabilities.

Working principle

The MP1474DJ-LF-P is a monolithic synchronous buck regulator that regulates output voltage with a fixed frequency peak current-mode design. The high-frequency operation eliminates the need for large external components such as transformers and inductors, making this part an ideal solution for space-constrained and cost-sensitive applications.The regulator works by controlling the N-channel MOSFETs that are switched between the input and output. The PWM signal applied to the MOSFETs controls the currents flowing to the output, which in turn adjusts the output voltage. As the load current increases, the output voltage drops; as the load current decreases, the output voltage rises. The MP1474DJ-LF-P is designed to provide fast and accurate regulation and transient response.For improved efficiency, the MP1474DJ-LF-P incorporates the MPS proprietary HyperLight Load™ (HLL) mode. HLL mode is a dual-phase, current-limited, operation that allows higher output currents and higher efficiencies from the device, especially in light load conditions. Additionally, the device features programmable current-mode control for improved transient response.The MP1474DJ-LF-P includes a variety of features to make it well-suited for a wide range of applications. It features over-temperature protection, short-circuit protection, integrated soft-start, and adjustable soft-stop modes for improved system reliability. Additionally, the adjustable switching frequency allows for faster response to load transients, which prevents system instability due to delayed response times.

Conclusion

The MP1474DJ-LF-P is a high-performance synchronous buck regulator from MPS that is well-suited for a wide variety of power supply applications. It offers an adjustable output voltage range from 0.5 V to 5.5 V, with a maximum continuous output current of 8 A. The device is designed with an integrated PWM current control loop and a variety of integrated protection and control features, allowing it to handle both light and heavy load conditions. The MPS HyperLight Load™ (HLL) Mode further boosts the efficiency of the device for many applications.

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