MAX767CAP+

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MAX767CAP+ Application Field and Working Principle

The MAX767CAP+ is part of the DC DC switching controller family of voltage regulators—particularly PolyPhase Pulse Width Modulation (PWM) Controllers—from the MAXIM Integrated company. This solution is a dual-phase PolyPhase PWM step-down DC-DC controller that offers very high efficiency, excellent line and load regulation performance, as well as low output voltage noise.

The MAX767CAP+ is designed to be used in applications requiring multiple power rails with a wide range of operating frequencies. It has two independently controlled, synchronous Pulse Width Modulation (PWM) controllers, each of which has two current-sense inputs, two dedicated comparators, as well as four programmable output pins. Designers can easily configure the MAX767CAP+ to meet the most demanding application requirements.

Application Field

The MAX767CAP+ is ideal for applications requiring multiple power rails, general-purpose computing and networking applications, system power supplies, digital power supplies, and low-voltage point-of-load conversion. It is optimized for use in Li-Ion battery based systems.

• DC-DC switching controllers for low-voltage point of load (POL) conversion
• Digital power supplies
• SATA drives
• Li-Ion battery based systems with maximum efficiency
• High-performance computing and networking applications
• General system power supplies

Working Principle

The MAX767CAP+ integrates two independent PolyPhase PWM controllers, each capable of controlling two synchronous, power MOSFETs. This dual-phase architecture can provide up to 2x the flexibility and current-handling capability of a single-phase design. The core of each PWM controller is a 100MHz oscillator enabling very efficient operation. The two controllers can be independently configured to provide output up to 6-phase power rail solutions.

The MAX767CAP+ also integrates two current-sensing amplifiers, two dedicated comparators, as well as four programmable output pins. These features make the MAX767CAP+ an ideal solution for designers looking to implement multiple power rails with a wide range of operating frequencies. The current-sense amplifiers provide the necessary accuracy and bandwidth to meet the current-limiting requirements of Li-Ion battery switchers.

The MAX767CAP+ also includes an integrated overvoltage immune (OVI) protection that eliminates the need for external N-channel MOSFETs. This integrated OVI protection prevents damage due to overvoltage conditions and improves system reliability. Additionally, the MAX767CAP+ provides integrated Adaptive Negotiation™ (AN) circuitry, enabling several adjacent devices to step-up their voltage levels simultaneously.

The MAX767CAP+ also integrates a digital interface, providing control and monitoring capabilities. The controller includes a digital interface which can be used to select various operating modes, monitor system status, and provide control and monitoring of internal settings. The controller also provides a wide range of safety features, including Overload Protection (OLP), OC Shutdown (OCS), Overvoltage Protection (OVP) and Undervoltage Protection (UVP). These features ensure optimal system performance and maximum system reliability.

The MAX767CAP+ is packaged in a small 8-pin, 4mm x 4mm, 10-pad QFN. It is also available in a 28-pin TSSOP package. This makes it an ideal solution for space-restricted applications.

In summary, the MAX767CAP+ is a versatile and highly efficient PolyPhase PWM step-down DC-DC controller. Its flexibility, current-handling capability, and variety of protection features make it ideal for multiple power rail applications. Its small form factor and low-voltage capabilities ensure that it can be integrated easily into compact designs and will help meet the most demanding application requirements.

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