MAX665CWE+T

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MAX665CWE+T is a monolithic integrated circuit that features low dropout linear regulators and high performance DC-to-DC switching regulators. It is designed to provide a robust and cost-effective solution for applications such as battery-powered systems where both low output ripple and low quiescent current are required.

The MAX665CWE+T provides power supply design flexibility through high efficiency step-down DC-to-DC switching regulators and ultra-low-dropout linear regulator. The MAX665CWE+T is rated for input voltages up to 5V and is available in a 6-pin surface mount SOIC or MSOP package. This product is qualified for automotive applications.

MAX665CWE+T Application Field

MAX665CWE+T is suited for a wide range of applications due to its wide input voltage range and high switching frequency. It is ideal for industrial, telecommunications, automotive, and mobile computing applications. Some of specific examples include:

• Battery-operated systems
• Portable instruments
• Automotive systems
• Cell phones, PDAs, and wireless devices
• Low-power gaming consoles
• Set-top boxes
• Breakerless ignition systems

MAX665CWE+T Working Principle

The MAX665CWE+T is designed to combine a low dropout (LDO) linear regulator with a high effeciency stepdown DC-DC switching regulator to help reduce board space and cost. The linear regulator operates with a low quiescent current of 4µA and is capable of providing an output current of up to 200mA. The DC-DC switching regulator is capable of providing an output current of up to 2A and has a high switching frequency of 650kHz.

The regulator consists of two sections, the high-side driver and the low-side driver. The high-side driver is a P-Channel MOSFET that is designed to reduce the input voltage and the low-side driver is an N-Channel MOSFET that is designed to increase the input voltage. When the regulator is not being used, the high-side & low-side MOSFETS are switched off. The regulator will then switch on the high-side & low-side MOSFETS as needed to match the desired input and output voltages.

The regulator also includes an over temperature protection feature that will limit the output voltage when the die temperature exceeds the absolute maximum rating. This feature can be used to prevent damage to the system in the event of an over temperature condition.

The MAX665CWE+T\'s integrated thermal protection feature helps protect the system from thermal damage caused by external components. The protection feature limits the regulator\'s output voltage when ambient temperatures exceed a certain limit. The over-temperature protection also helps prevent nuisance faults due to external events, such as when a vehicle is parked in direct sunlight.

The MAX665CWE+T offers an integrated adjustable soft start circuit to reduce inrush current and voltage overshoot during startup. This feature can be used to reduce the stress on components in the load during power-up, and reduce the risk of system glitches.

The MAX665CWE+T also includes an adjustable output voltage, allowing the user to adjust the output voltage to match the specific requirements of the application. This feature can be used to allow the system to operate at the most efficient point.

In summary, the MAX665CWE+T is an integrated DC-DC switching regulator & ultra-low dropout linear regulator that provides a simple and robust solution for portable power applications. It offers a wide input voltage range, high switching frequency, and integrated over-temperature protection. The adjustable soft start and adjustable output voltage features allow for maximum efficiency and design flexibility.

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