MAX770CPA+

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The MAX770CPA+ is an integrated pulse-width modulation switching regulator/controller designed to drive an external N-channel MOSFET. The device operates from a standard 5V input and utilizes an adaptive on-time regulation technique to maintain excellent output voltage regulation over a wide load range. The device is optimized for use with buck and buck-boost switching regulators and is able to reduce the size, parts count, and cost of the power supply design.

The MAX770CPA+ includes many features to ensure reliable and performance:

• An analog compensation circuit reduces the need to adjust loop components outside the initial design
• Maximum load current and output voltage protection
• Optional output voltage tracking/sequencing functions
• Automatic multiple output output voltage levels
• Internal soft-start circuit to limit inrush current during start-up.
• A wide range of operating frequencies allows the use of smaller components
• Integrated 3-state output enable function

The MAX770CPA+ is best suited for applications such as DC-DC efficient Converters, Adaptive Power Supplies, VRMs, and Battery Chargers.

The MAX770CPA+ utilizes an adaptive on-time regulation technique which allows the device to maintain excellent regulation over a wide load range. The on-time regulation loop will adjust the output voltage to compensate for changes in the load current. The device also includes an input voltage hold-off circuit, a maximum current protection circuit, an output voltage cycle skip protection circuit, and optional output voltage tracking/sequencing functions.

The MAX770CPA+ includes an internal soft-start circuit which allows the system to limit the inrush current during start-up. This helps prevent supply current droops during start-up, as well as any overshoot/undershoot at the output voltage.

The MAX770CPA+ also features a wide range of operating frequencies which allows the use of smaller components. This makes the device more cost effective and reduces the overall parts count. The device also includes an integrated 3-state output enable function which allows the device to be disabled without shutting down the main supply voltage.

The MAX770CPA+ is a versatile and cost-effective solution for applications such as DC-DC efficient Converters, Adaptive Power Supplies, VRMs, and Battery Chargers.

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