MAX749CPA

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MAX749CPA Application Field and Working Principle

The MAX749CPA is an ultra-high-skilled, low-power, improvement voltage supervisor (VSU) with a built-in precision voltage reference that operates from 1.2V to 5.5V. Offered in the 10-lead, tiny micro SMD package, it allows to minimize board area without sacrificing performance. The MAX749CPA VSU monitors typically 4.75V by adding 1.25V to the built-in VREF. Although its sturdy voltage supervisor, the device also oversampling and refreshes the reference window that creates higher accuracy than traditional monitoring approaches.

Application Field

The MAX749CPA has a broad range networking and industrial/medical applications include:

• Portable devices
• Battery powered systems
• USB gadgets
• PCI cards
• Telecommunications
• Industrial equipment
• Power supplies

Working Principle

The MAX749CPA trigger desire is 1.25V more than the VREF regulate range from 1.2V to 5.5V. When the device is in working process, it will auto monitor the power supply voltage. When the voltage is in the guaranteeing range, a valid final is indicated. In the event of a power failure, the reset final assertion would hold for a minimal duration of 140ms when the working voltage moves away from the appropriate array.

The MAX749CPA is accessible in both thermally reversed and open-drain form factors. The MAX749CPA open-drain VSU can determine outcomes of circuit failures and short circuits to ground, enabling it to offer very long-term protection with a cold fault current limiter. The MAX749CPA thermally reversed segment characteristics integrated “positive task clamping” with a current limitation of 10mA.

The MAX749CPA is a reliable voltage supervisor with adjustable voltage range maintaining low quiescent current, fast reset response time and extremely accurate reset voltage precision. It can provide a reliable system protection that benefits from its enhanced power demand and automatic reset sequences.

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