MAX5035CUPA

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The MAX5035CUPA is a DC/DC step-Up/step-Down Synchronous Switching Regulator from Maxim Integrated. It is a multi-mode, wide input voltage range, constant frequency, PWM control step-up/step-down DC/DC switching regulator. Its wide input voltage range, combined with its ultra-low quiescent current and highACPR-to-performance ratio, makes the MAX5035CUPA uniquely suited for a variety of applications.

The MAX5035CUPA has a wide input voltage range from 3.2V to 17V, making it suitable for a wide range of input sources. It provides an ultra-low quiescent current of 92uA in boost mode, and 35uA in buck mode, allowing for efficient operation. Its wide input voltage range combined with its ultra-low quiescent current provide an ideal solution for battery-powered applications, allowing the device to be used in portable sensing and data gathering systems where power efficiency is critical.

The MAX5035CUPA’s constant-frequency, pulse-width modulation (PWM) control topology enables high-efficiency and improved transient response with fast-loop response. The device includes foldback over-current protection, preventing over-current stress on the power supply, eliminating external over-current protection components.

The MAX5035CUPA is a 6-A, high-efficiency, PWM, DC/DC step-up/step-down switching regulator that is ideal for applications such as portable electronics and industrial control systems, as well as automotive, communications, medical and avionics equipment.

In a typical application, the MAX5035CUPA is used to provide the necessary supply voltage for the DC/DC buck-boost converter. It is configured to operate as a synchronous buck-boost converter from an unregulated DC voltage source. The device switches between boostand buck-mode dependent on the input voltage level and the output voltage set point.

The MAX5035CUPA controls the PWM duty cycle based on feedback voltage of the converter, by comparing it to the external feedback reference voltage. The MAX5035CUPA provides the logic to the gate drivers of the external power switches.Two power MOSFETs—an NohmFET and a P-channelFET—are used in the MAX5035CUPA configuration.

The device features an adjustable Soft-Start, which can be programmed with an external capacitor, adjusting the current ramp-up to avoid inrush current. An under-voltage lockout (UVLO) circuit also makes sure that the input voltage does not sag below the required operating level.

The MAX5035CUPA is available in a compact 5mmx5mm, 24-pinQFN package, making it ideal for applications where space is at a premium. The devicehas an operating temperature range of -40°C to +85°C.

In summary, the MAX5035CUPA is a high-efficiency, DC/DC switchingRegulator that provides a wide input voltage range, ultra-low quiescent current, constant frequency PWM control, and highACPR-to-performance ratio. It is ideal for applications that require a wide range input voltage, high efficiency, and fast transient response.

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