MAX5974DETE+G3U

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The MAX5974DETE+G3U is a high-efficiency dc-to-dc switching controller that provides a constant output voltage or current, regardless of what is supplied to the input. This controller is suitable for applications in power management, automotive electronics, and consumer electronics:

Specifications

The MAX5974DETE+G3U features:

• Low VIN Operating range from 2 V to 6 V
• Quiescent current of 7.5 mA
• Output voltage range from 0.6 V to 5.5 V, adjustable with external resistors
• High step-up ratio of 1.5
• Plastic and ceramic packaging-options for varied thermal performance

Applications

The MAX5974DETE+G3U is suitable for a wide range of applications in power management, automotive electronics, and consumer electronics. These applications include:

• Mobile phones and smart phones
• Tablets, handheld computers, and other portable electronic devices
• Automotive electronics, such as adjustable power steering systems and GPS systems
• Wireless data communication systems
• Robotic applications

Working Principle

The MAX5974DETE+G3U converts incoming power into a precise, adjustable output voltage or current using the buck-boost switching concept. This switching concept operates like a type of step-up transformer, where the input voltage is boosted and then regulated to the desired output voltage or current. This controller employs the high-frequency synchronous rectification technique to convert power at low losses and high efficiency.

To control the output voltage or current, this controller uses a high-efficiency, fixed-frequency pulse-width modulator (PWM). This PWM regulates the transfer of power from the input to the output and can be easily adjusted using external resistors. To ensure reliable operation, the controller also has a built-in soft start and over-current protection, as well as an under-voltage lockout (UVLO) circuit.

The MAX5974DETE+G3U is an ideal choice for applications requiring precise control of output voltage or current in a wide range of conditions. Its high efficiency and small footprint make it a great fit for portable electronic devices and other space-constrained designs.

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