MAX16943EGEE/V+T

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Power management integrated circuits, or PMICs, are critical for the reliable operation of many products and systems. They are used to manage power, typically by controlling different electrical subsystems such as voltage regulators, power converters, and battery chargers. The MAX16943EGEE/V+T is a PMIC from Maxim Integrated that is specifically designed for use in space constrained applications. This article will discuss the application field and working principle of the MAX16943EGEE/V+T.

Features and Benefits

The MAX16943EGEE/V+T is a highly integrated single-chip solution that combines an array of power system features. It provides eight step-down regulators, a multi-phase controller with four differential outputs, an 8-channel ADC, and a wide range of monitoring and protection features. It also supports various modes of operation, including burst mode (BM) and discontinuous conduction mode (DCM), to increase efficiency. Additionally, the chip can operate over a wide input supply range of 2.7 V to 10 V, and it has an adjustable output voltage range of 0.6 V to 5.25 V with a maximum current of 10 A.

The chip also provides power-saving features such as low quiescent current and ultra-low power mode operation. It also supports I2C and programmable over-current protection (OCP) and thermal protection (TEMP) functions. There is also an optional 48-MHz, 8-bit microcontroller unit (MCU) integrated into the package.

Functional Blocks

The MAX16943EEV+T consists of the following major functional blocks:

• Voltage Regulators: This feature provides power regulation for the entire system. It consists of 8 integrated regulators with adjustable output voltage range from 0.6 V to 5.25 V with a maximum current of 10 A.
• Multi-phase Controller: This feature allows the user to configure up to four differentials to control the current in multiple output channels. The current in each channel can be regulated accurately for high efficiency.
• 8-channel ADC: This feature allows the chip to measure the input voltage, output voltage, and the current in each channel. This information can be used to optimize the system performance and reduce power consumption.
• Programmable Over-Current Protection and Thermal Protection: These features protect the system from damage caused by over-current or excessive temperatures.
• Low Quiescent Current Mode: This feature allows the chip to operate in a low-power mode to save energy when the system is idle.
• 48-MHz integrated microcontroller: This feature allows the user to program the performance of the chip to optimize the system performance. It also integrates other features such as I2C.

Applications

The MAX16943EGEE/V+T is mainly used for space-constrained applications that require reliable power supply and management, such power management for mobile phones, personal media players, and other portable devices as well as industrial, medical, and automotive systems.

Working Principle

The chip works by taking input power and storing it in an on-chip DC/DC converter (bi-directional buck-boost converter). The stored energy is then used to supply power to the system. The chip\'s 8 step-down regulators provide the necessary stability and adjustability to each system while the multi-phase controller distributes the current to the various output channels. The 8-channel ADC provides feedback to the chip to measure the input and output voltage, current, and temperature, which can then be used to optimize the system performance.

The chip\'s low quiescent current mode and ultra-low power shut-down mode helps to reduce power consumption during idle times. Additionally, the programmable OCP and TEMP features help to protect the system from damage caused by over-current or excessive temperatures. Finally, the integrated 48-MHz, 8-bit MCU allows the user to customize the performance of the chip to optimize the system performance.

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