MP2490DS-LF

Voltage - Input (Max):	36V
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	700kHz
Current - Output:	1.5A
Voltage - Output (Max):	15V
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:	Tube

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MP2490DS-LF Application Field and Working Principle

The MP2490DS-LF is a DC-DC switching regulator, which is used in many ways. It is an integrated, low quiescent current step-down regulator that provides efficient and stable power conversion from a wide 4.5V to 24V input voltage range to an adjustable voltage output ranging from 0.33V to 20V. The MP2490DS-LF is available as SSOP16 or a die taped in tape and reel or wafer. This product is ideal for many portable device applications, since it offers high efficiency to maximize battery run time, low quiescent current, and a tiny footprint.

FEATURES

The MP2490DS-LF offers excellent features such as high efficiency, low quiescent currents, input voltage of 4.5V to 24V, output voltage range of 0.33v to 20V, adjustable switching frequency of up to 2MHz and programmable soft start. Additionally, the device comes with an internal compensation network, overvoltage protection and overcurrent protection.

WORKING PRINCIPLE OF MP2490DS-LF

The MP2490DS-LF DC-DC switching regulator works in step-down mode to provide efficient and stable power conversion from a wide 4.5V to 24V input voltage range to a programmable output ranging from 0.33V to 20V. It uses Pulse Width Modulation (PWM) or Pulse Frequency Modulation (PFM) to regulate the output voltage.In the PWM mode, the converter ramps up and down the buck output voltage at a rate that is proportional to the voltage difference between the set-point and what is sensed on the output. The maximum output current is maintained until the output voltage reaches the desired level. The MP2490DS-LF has a unique current regulation loop that regulates output voltage ripple. In the PFM mode, the converter enters a low quiescent current state at higher output voltage levels and reduces the switching frequency as the output decreases. This results in better efficiency and higher conversions, which in turn helps save power. The MP2490DS-LF integrates an undervoltage lockout (UVLO) which will disable the device when the output voltage falls below 0.45V. When the UVLO is triggered, the device automatically shuts off and will remain disabled until the output voltage rises above 0.65V.

APPLICATIONS

The MP2490DS-LF DC-DC switching regulator is ideal for many portable device applications that require efficient, stable power conversion. It has a small physical size, so it can integrate into space-constrained systems. Additionally, it allows for adjustable switching frequency of up to 2MHz, which is great for managing noise sensitive circuitry. Some applications the MP2490DS-LF can be used in are: • Digital Video Recorders, • LCD Monitors and Projectors, • Network Equipment, • Servers and Storage, • Notebooks and Tablets, • Industrial Applications.

CONCLUSION

The MP2490DS-LF is a great choice for end products that require regulated power conversion with low input voltage, high efficiency and small size. It offers a wide range of features such as adjustable switching frequency, overvoltage protection, programmable soft-start, low quiescent current and an internal compensation network, which makes it an ideal choice for various applications.

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