MAX1760EUB

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Maxim Integrated’s MAX1760EUB is a DC-DC switching regulator designed for notebook computer and other mobile applications. It integrates all the necessary features to provide a complete power solution, enabling board space savings and cost reduction. The regulator offers an adjustable output voltage between +1.4V to +4.4V.

The MAX1760EUB integrates a power MOSFET, gate driver and current sense amplifier, along with the built-in control loop. It operates from a input voltage of +3.3V to +20V and can deliver up to 6A of output current. It features a programmable current limit, open loop voltage feed-forward, overvoltage protection (OVP), soft start and thermal shutdown.

The MAX1760EUB utilizes an advanced current mode control architecture to ensure fast transient response and excellent line and load regulation. The current-mode implementation allows it to accurately regulate the output voltage even in the presence of large output capacitance. This feature makes it ideal for applications where the output capacitance may change on-the-fly such as in power management systems.

The MAX1760EUB is well-suited for a wide variety of applications such as PC power supplies, portable video apparatuses, printers, scanners, and telecommunication equipment. It is available in a 6-pin TSOT-23 package, and operates over a temperature range of -40°C to +85°C.

Working Principle

The MAX1760EUB employs a high frequency, current-mode buck switching regulator topology. It uses an internal power switch to convert the input voltage to an adjustable output voltage. The regulator continuously compares the voltage feedback signal to a reference voltage, and adjusts the duty cycle to the power switch accordingly.

The MAX1760EUB includes an internal gate driver to drive the power switch. The amount of current through the power switch is sensed using an current-sense amplifier, and compared to a programmable maximum peak current limit. This type of current sensing allows the device to provide adequate current limit protection without adding external circuitry.

The device is also equipped with a single loop soft start circuit to limit the inrush current at startup. The current limit is lifted when the output voltage rises above a predetermined threshold. The device includes an external voltage feed-forward input signal which is used to reduce the output voltage ripple. The MAX1760EUB also includes adjustable overvoltage protection circuitry to protect the system from a high output voltage.

Conclusion

The MAX1760EUB is a highly integrated DC-DC switching regulator designed for notebook computer and other mobile applications. It provides a complete power solution, enabling board space savings and cost reduction. The device utilizes an advanced current mode control architecture to ensure fast transient response and excellent line and load regulation, and it can deliver up to 6A of output current. In addition, the device is well-suited for a wide variety of applications such as PC power supplies, portable video apparatuses, printers, scanners, and telecommunication equipment.

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