MAX8640ZELT12+T

Voltage - Output (Min/Fixed):	1.2V
Base Part Number:	MAX8640
Supplier Device Package:	6-uDFN (1.5x1.0)
Package / Case:	6-WFDFN
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	3.6MHz
Current - Output:	500mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Strip

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Introduction

The MAX8640ZELT12+T DC-DC switching regulator is a synchronous buck regulator featuring a 0.6-V to 5.5-V input voltage range, up to 12A continuous output current and up to 55V output voltage capacity. It provides both high efficiency and flexibility, allowing users to set the switching frequency, soft start and overcurrent thresholds and is ideal for battery-operated, industrial and automotive applications, such as LED displays, computer auxiliary circuits, and multiple other power conversion applications.

Application Field

The MAX8640ZELT12+T is specifically designed to be robust and has high efficiency to provide a wide range of electrical power conversion applications. It is suitable for a variety of designs with the application circuit configuration.

The MAX8640ZELT12+T advantages include short circuit protection, over-temperature protection, and excellent thermal performance. It is optimized for low quiescent current and a maximum switching frequency of 2.2MHz, making it suitable for high frequency and long life applications.

The MAX8640ZELT12+T is commonly used in computer auxiliary circuits, LED displays and multiple other power conversion applications. It is often used in highly demanding automotive applications such as body electronics, battery management and powertrain applications.

Working Principle

The MAX8640ZELT12+T works using a dual synchronous buck regulator type, with outputs for both positive and negative voltage. This design enables the switching regulator to efficiently transfer energy from the input to the output.

It utilizes a current-mode control topology with an internal oscillator, allowing for greater design flexibility. In current-mode control, the output voltage is controlled by manipulating the magnitude of the switching current. This current-mode design enables fast transient response and reduced output voltage ripple, increasing efficiency and stability.

When the input voltage approaches the input overload limit, the current in the converter is forced down to a safe level, thus protecting the system. The MAX8640ZELT12+T is capable of handling transient voltage loads up to 12A, delivering maximum power conversion and dynamic performance.

The MAX8640ZELT12+T also features integrated power filters, which enhance the efficiency of the regulator, by minimising the noise produced as the power stage switches. It also includes an over-temperature protection that shuts down the output if the temperature exceeds a certain threshold for extended periods.

Conclusion

The MAX8640ZELT12+T is an exceptional DC-DC switching regulator, with a 0.6-V to 5.5-V input voltage range, up to 12A continuous output current and up to 55V output voltage capacity. It has a range of protection features including over-current and over-temperature protection, as well as integrated power filters which minimise noise. It is ideal for various applications, including but not limited to computer auxiliary circuits, LED displays and multiple other power conversion applications.

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