LM5002MAX

Voltage - Output (Min/Fixed):	3.1V
Base Part Number:	LM5002
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	50kHz ~ 1.5MHz
Current - Output:	400mA (Switch)
Voltage - Output (Max):	76V (Switch)
Series:	--
Voltage - Input (Max):	75V
Voltage - Input (Min):	3.1V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost, Flyback, Forward Converter, SEPIC
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Up/Step-Down
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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Introduction

LM5002MAX is the latest in a new generation of DC-DC switching regulators from STMicroelectronics. It is the first product to feature ST\'s new MAX technology, and is an ideal solution for applications where high efficiency and excellent transient performance are required.

Application Field

The LM5002MAX is suitable for a wide range of applications, including cellular base stations, networking and telecom equipment, distributed power systems, point-of-load regulation, medical equipment, and automotive systems. With its wide input voltage range (3.3V to 40V) and ultra-low quiescent current, the LM5002MAX is especially well suited for battery-powered or energy-harvesting applications. It is also very easy to use: it includes a simple configurable control loop and can be quickly configured with just one resistor.

Working Principle

The LM5002MAX is a buck switching regulator with a simple control loop. The regulator achieves high efficiency by using pulse-width modulation (PWM) to rapidly switch the output voltage between a high and low level. The output voltage is controlled by a voltage feedback loop.When the feedback voltage is below the reference voltage ( FB < Ref), the PWM output is high, and the regulator draws current from the input. Conversely, when the feedback voltage is above the reference voltage (FB > Ref), the PWM output is low, and the regulator sinks current into the output load.The output voltage is continuously adjusted according to the difference between the feedback voltage and the reference voltage, such that the two remain matched. The output voltage remains stable as long as the input voltage and the load current remain within the specified operating limits of the regulator.

Conclusion

The LM5002MAX is an outstanding choice for a variety of applications requiring a high-efficiency, low-quiescent-current DC-DC switching regulator. Its simple control loop and wide input voltage range make it easy to use, and its excellent transient performance and high efficiency make it an excellent solution for battery-powered or energy-harvesting systems.

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