MAX17245ETERB+T

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MAX17245ETERB+T Application Field and Working Principle

As a DC-DC switching regulator, the MAX17245ETERB+T is a member of the Power Management and Interface (PMIC) voltage regulator family. This device is a variant of the MAX17245E, which is a step-down, constant-frequency, synchronous switching regulator with integrated power switches. The MAX17245ETERB+T provides a high-accuracy reference voltage of 1.1V and a maximum output current of 0.8A to meet various application requirements.

Fields of Application

The MAX17245ETERB+T is designed to help extending system battery life in battery-operated applications. It is especially suitable for portable computing, datacom, and consumer applications such as digital cameras, portable media players, personal digital assistants, and cellular telephones. It is also used in applications where small size, minimal power dissipation, high efficiency, and simple design are critical factors.

Device Features

The MAX17245ETERB+T includes many features for power-management applications. These features include a low-dropout regulator (LDO) VIN/VOUT tracking regulator, a power-switch output disable, integrated boost diodes, adjustable soft-start, and overcurrent protection. The internal tracking regulator can be set to any voltage between 0.5V and 4.2V. The MAX17245ETERB+T also has four different output switching options: push-pull, synchronous, adjustable-frequency, and spread-spectrum.

Operating Principle

The MAX17245ETERB+T derives its output voltage from two separate circuits. One circuit consists of an input voltage, which is used to generate a reference voltage that is then combined with an adjustable divider to create an output voltage. The other circuit consists of a gate driver that connects the input voltage to the two output switches, which then connect the reference voltage to the output voltage. The MAX17245ETERB+T operates with a synchronous switching rate that is set by the oscillator and is adjustable using the pulse-width modulation control circuit. This allows the regulator to deliver higher output currents than non-synchronous regulators with little power loss.

Advantages of the MAX17245ETERB+T

The MAX17245ETERB+T has several advantages over other switching regulators. The integrated boost diodes reduce the BOM cost and the external components, providing a smaller and more cost-effective solution. The adjustable soft-start and overcurrent protection features help protect against output and short-circuit scenarios. Additionally, the low shutdown current and fast transient response provide added reliability and higher efficiency. All of these features provide an ideal solution for current and future power-management applications.

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