MAX16977SATE/V+T

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Today, power management integrated systems(PMIC) play an essential role in various types of equipment, including automotive, industrial and consumer electronics. In particular, the DC-DC switch mode voltage regulators are used to change voltage levels in different types of applications. The MAX16977SATE/V+T is a low quiescent current, 4.2V to 32V voltage regulator that is specifically designed for automotive and industrial applications. This application note will explain the features of the MAX16977SATE/V+T, its application field and the underlying working principle.

Features of MAX16977SATE/V+T

The MAX16977SATE/V+T is a member of the MAX16977 family of devices which are low quiescent current (1.45mA) DC-DC voltage regulator. It is designed to be used in a variety of applications such as bidirectional AC-DC buck/boost converters, adjustable DC-DC power supplies and automotive power systems. Designed for automotive and industrial applications, the MAX16977SATE/V+T features an integrated synchronous switch, allowing it to offer a peak efficiency of up to 95% over a wide range of input and output voltages. It also offers an adjustable output voltage range from 4.2V to 32V, which makes it suitable for a variety of applications. Moreover, the device features an integrated output voltage slew-rate control circuit that maintains output voltage accuracy over a wide temperature range and load conditions. This feature makes the MAX16977SATE/V+T ideal for a wide range of input and output voltages.

Application Field of MAX16977SATE/V+T

The MAX16977SATE/V+T DC-DC switching regulators are suitable for a wide range of applications, notably automotive and industrial. It is particularly well-suited for powering Power over Ethernet (PoE) devices, which often require multiple voltage rails, as the regulator\'s adjustable output voltage allows it to power a wide variety of devices. Additionally, the device is ideal for use in batteries, as the integrated low quiescent current allows it to conserve power. Finally, its high efficiency makes it suitable for powering portable electronic devices such as laptops and tablets, where power and space considerations are paramount.

Working Principle of MAX16977SATE/V+T

The MAX16977SATE/V+T is a low-quiescent current DC-DC switching regulator. It operates in the buck/boost topology, allowing it to accept both AC and DC input voltages from 3.1V to 32V. The device uses an external switching MOSFET as a power switch, along with an internal PWM comparator that controls the MOSFET switch turn-on and turn-off cycles. The regulator operates in a quasi-continuous conduction mode (QCCM) to maintain a constant frequency and maximum efficiency during light and heavy loads. The MAX16977SATE/V+T also features an adjustable output voltage range of 4.2V to 32V, which is set by an external resistor divider.

In summary, the MAX16977SATE/V+T is an ideal DC-DC switching regulator for automotive and industrial applications. It is a low quiescent current device that offers an adjustable output voltage range of 4.2V to 32V, peak efficiency of up to 95% and an integrated output voltage slew-rate control circuit for output voltage accuracy over a wide temperature range and load conditions. The device operates in the buck/boost topology, using an external switching MOSFET for power switching and an internal PWM comparator for control, and operates in a quasi-continuous conduction mode (QCCM) to maintain a constant frequency and maximum efficiency during light and heavy loads.

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