MAX641ACSA+

Voltage - Output (Min/Fixed):	1.31V (5V)
Base Part Number:	MAX641
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	45kHz
Current - Output:	450mA (Switch)
Voltage - Output (Max):	18V (Switch)
Series:	--
Voltage - Input (Max):	16.5V
Voltage - Input (Min):	2V
Number of Outputs:	1
Output Type:	Adjustable (Fixed)
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tube

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Introduction

The MAX641ACSA+ voltage regulator is a DC-DC switching regulator from Maxim Integrated that provides a highly efficient output voltage regulation solution for demanding applications that require a combination of stability and accuracy in the face of wide changes in load current and input voltage. The MAX641ACSA+ is specifically designed to accept and regulate a wide range of input voltage levels, providing reliable output voltage regulation while exhibiting excellent transient response and high efficiency.

Applications

The MAX641ACSA+ is suitable for a wide range of applications, in particular those that require reliable and accurate output voltage regulation in the face of varying load current and input voltage ranges. Such applications include power supply designs for microprocessors and DSP cores, memory and system boards, graphics cards, and embedded control systems. The MAX641ACSA+ can also be used to power voltage-sensitive logic gates and FPGAs, in addition to providing connected components with the required power to function. Furthermore, the MAX641ACSA+ can be used to power digital signal processors, microcontrollers, and energy-hungry components such as LCD and plasma displays.

Working Principle

The MAX641ACSA+ is a buck-boost converter with a control system that allows it to accurately track the changing input voltage. It is able to regulate and maintain the output voltage by varying the duty cycle of the pulses that are applied to the power switch, thus modulating the output voltage.An external inductor is used to store energy, which is transferred to the output capacitor to maintain the output voltage when the load current transient changes. The MAX641ACSA+ also has a low-dropout protection feature that prevents output overvoltage during overload.The control loop also ensures that the input voltage remains within its specified safety limits by sensing changes in the input voltage and adjusting its duty cycle accordingly. This ensures that the output voltage remains regulated and is able to continue to power downstream components.

Key Features and Benefits

The key features of the MAX641ACSA+ include its wide input voltage range (1.8V - 5.5V), current limit with cycle-by-cycle foldback and adjustable soft-start, and its low noise architecture. The MAX641ACSA+ also has a wide output voltage range (0.8V - 5.5V) and provides a regulated output voltage with a fast transient response time. The MAX641ACSA+ offers an industry-leading efficiency of up to 93%, which helps to reduce the power loss in the power conversion process and also reduces thermal dissipation in the system. This means that the MAX641ACSA+ can achieve higher output power from a given input power, resulting in a more efficient power supply system.The unique combination of features provided by the MAX641ACSA+ makes it an ideal choice for a wide range of demanding applications. It provides accurate output voltage regulation even in the face of wide load current and input voltage ranges and its excellent efficiency ensures that the power supply system remains cool and reliable.

Conclusion

The MAX641ACSA+ is an advanced DC-DC switching regulator from Maxim Integrated that offers excellent output voltage regulation and efficient power conversion, making it suitable for a wide range of applications. The MAX641ACSA+ features a wide input voltage range, an adjustable soft-start, and current limit with cycle-by-cycle foldback. With its wide output voltage range and fast transient response, the MAX641ACSA+ is an ideal choice for powering sensitive logic gates and other components that require reliable and accurate power. Additionally, the MAX641ACSA+ offers an industry-leading efficiency of up to 93%, helping to reduce power loss and thermal dissipation in the power supply system.

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