MAX6313UK45D3-T

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PMIC - Supervisors are one of the most important components for ensuring the reliable operation of today\'s electronic devices, such as cell phones, handheld and portable devices. The MAX6313UK45D3-T are a type of supervisor ICs which are designed to monitor the power down and power up signals in the systems and provide a state of safe operation. Its application field and working principle will be discussed in this article.

Application Field

The MAX6313UK45D3-T are supervisors in the industry-standard space saving 8-pin µMAX package. They feature a supervisory circuit to monitor power-down events that cause an output reset. It has an operating supply voltage range of 1.6V to 5.5V, a fixed-voltage reset threshold of 4.40V, an active-low reset output, and a low-voltage reset delay (LVRD) time of 80 ms. The MAX6313UK45D3-T are optimized for use in battery-powered applications and other space-constrained systems. It is suitable for hand-held, mobile, and consumer, applications such as personal digital assistants (PDAs), cellular phones, portable medical devices, wireless LAN OSD, or any reliable power-control application.

The MAX6313UK45D3-T are most useful in applications where an orderly shut down of the supply is required before disconnection from the power source. This can range from the power up sequencing of critical components to the reset of the system powering down in order to prevent data corruption. The MAX6313UK45D3-T are ideal devices to provide accurate and consistent control of the desired power-down timing.

Working Principle

The MAX6313UK45D3-T monitor power down and power up signals of the system to provide reset. Its reset output remains low until the device is powered up and the supply voltage rises above the fixed-voltage reset threshold (VTH). The device also has a low-voltage reset delay (LVRD) of 80ms, which provides the user with an adjustable time interval for de-asserting the reset. The MAX6313UK45D3-T feature an active-low reset output and an open-drain reset output which ensures that the reset output remains low during a power transition and asserted only after the supply voltage rises above VTH.

The MAX6313UK45D3-T are designed with multiple options for monitoring the power down and power up signals. It has an active-high power-good (PG) pin, which can be used to monitor the power-down and power-up signals provided by an external power supply. It also has an active-low power-down (PWD) pin, which can be used to monitor the power-down events. The PWD pin can be connected to an external switch and can be used to generate an interrupt signal indicating an on/off event.

The MAX6313UK45D3-T also provide an advanced output enable (OE) feature, which enables the reset output only if the OE pin is asserted. This ensures that the reset output is disabled if the OE input is de-asserted. This feature is useful for preventing unintended resetting in the event of a power transition.

In summary, the MAX6313UK45D3-T are 8-pin supervisors designed to monitor the power down and power up signals in the systems and provide a state of safe operation. It is suitable for hand-held and portable applications, such as personal digital assistants, cellular phones, and portable medical devices. The device features a supervisory circuit to monitor power-down events that cause an output reset, an active-low reset output, an open-drain reset output, an active-high power-good (PG) pin, an active-low power-down (PWD) pin and an advanced output enable (OE) pin. It has an operating supply voltage range of 1.6V to 5.5V, a fixed-voltage reset threshold of 4.40V, and a low-voltage reset delay (LVRD) time of 80 ms.

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