MAX17244ETERB+T

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PMIC - Voltage Regulators - DC DC Switching Regulators

MAX17244ETERB+T application field and working principle

The MAX17244ETERB+T is an adjustable step-down voltage regulator from Maxim Integrated which integrates five current-–mode step-down voltage converters and one LDO for an applications processor or a digital power use case. The step-down controllers use a current-mode, variable-frequency control scheme. Five independent converters and one LDO regulator offer total supply current range of integrated solution and it is optimized for handling various applications.

The MAX17244ETERB+T on-chip voltage and temperature monitoring and motor control capabilities that enable it to support the latest applications such as smartphones, tablet computers, and gaming consoles. It offers a wide input voltage range of 2.7V to 5.5V, and a wide output voltage range of 0.8V to 5.5V making it suitable for both high-voltage and low-voltage applications. It has a wide switching frequency range from 100kHz to 2.2MHz, and can deliver a maximum continuous output current of 500mA.

The MAX17244ETERB+T is a complete, compact and highly efficient voltage regulator that is designed for use in a variety of applications such as PCs, servers, mobile phones, tablets, and gaming consoles. It supports a wide range of processor and digital power architectures, and offers a high integration level, low output noise, high efficiency and low standby currents.

Working Principle

The MAX17244ETERB+T utilizes a current-mode, variable-frequency control scheme to control the output voltage in step-down applications. The integrated controller drives two external MOSFETs, one high-side and one low-side. When the output is low, the low-side MOSFET is a P-channel device, and when the output is high, the high-side MOSFET is an N-channel device. This switchable topology results in higher efficiency, lower EMI and simpler control circuitry. The flexible operating frequency allows for faster switching at high duty cycle, which further improves the efficiency.

The current-mode control scheme is based on measuring the current flowing through the inductor. A regulated current source is used to regulate the inductor current and the error amplifier is used to control the duty cycle of the switches to maintain the output voltage. The current source ensures that the inductor current is maintained even when the output voltage is changing drastically. The output voltage can be controlled using either the internal reference or an external reference.

The MAX17244ETERB+T is designed to provide high efficiency with very low outputs while maintaining stable switching frequency. The integrated feedback loop allows for wide regulation range and fast transient response. The MAX17244ETERB+T also includes low noise LDO regulator for providing low noise supply for low power. For added protection against damage due to high temperatures or overcurrent, the MAX17244ETERB+T provides over-temperature, short-circuit and overcurrent protections.

Applications

The MAX17244ETERB+T is well suited for a variety of applications including PCs, servers, mobile phones, tablets, and gaming consoles. Its wide range of operating voltages and high efficiency make it ideal for any power conditioning or voltage regulator application. Additionally, its adjustable switching frequency allows for faster switching at high duty cycle and improved system performance. The wide range of protection features makes it highly reliable and safe to use.

In addition, the MAX17244ETERB+T can be used in digital power, storage, and motor control applications. Its flexible configuration options, integrated voltage and temperature monitoring capabilities and support for a wide range of processor and digital power architectures enable optimum performance and scalability. In one application, the MAX17244ETERB+T could be used as an adjustable voltage regulator for providing power to a processor, while in another application it could be used as a motor controller for providing precise control of speed and torque.

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