MAX17557ATP+T

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The MAX17557ATP+T is a versatile DC-DC switching controller that is part of the power management integrated circuit (PMIC) family. The MAX17557ATP+T supports an adjustable output voltage, output current limit, and input voltage range, making it ideal for a variety of applications. This application field and working principle note provides an overview of the MAX17557ATP+T and discusses key features, application examples, and the step-by-step process for configuring the controller.

Features and Benefits

The MAX17557ATP+T provides various features and benefits, such as:

• Adjustable output voltage of 0.6 V to 2.9 V
• Adjustable input voltage range of 5 V to 48 V
• 3A adjustable current limit
• Wide operating temperature range (–40°C to +125°C)
• I2C compatible digital interface:programmable parameters, including output voltage and current limit.
• Low supply current at low output power (<1 mA)
• Operation in fixed frequency, or adjustable through external capacitor.

Working Principles

The MAX17557ATP+T is a DC-DC switching controller, meaning it uses a power switch to control the energy transfer from the input to the output. The MAX17557ATP+T switches at a variable frequency, which is set by an external capacitor. This variable switching frequency allows for efficient operation across a wide input voltage range. The output voltage is programmed by varying the duty cycle of the power switch.

Applications

The MAX17557ATP+T is an ideal choice for applications that require a wide input voltage range, adjustable output voltage, and adjustable output current such as:

• Adaptive charges for USB, battery, and AC adapter
• Low power microprocessor applications
• Voltage step-down converters
• Voltage translation up or down for applications with large voltage differences

Step-by-Step Configuration

Before designing an application circuit, it is essential to configure the MAX17557ATP+T for your specific needs. The configuration process is as follows:

1. Program the output voltage by connecting DAC pins to external voltage references, or by programming the voltage over the I2C interface.
2. Program the current limit by connecting an external resistor or by programming the current limit over the I2C interface.
3. Program the input voltage range by connecting DAC pins to external voltage references, or programming the input voltage range over the I2C interface.

Conclusion

The MAX17557ATP+T is a versatile DC-DC switching controller that is part of the PMIC family. It is ideal for a variety of applications that require an adjustable output voltage, output current limit, and input voltage range. With its adjustable frequency, adjustable current limit, and adjustable input voltage range, the MAX17557ATP+T is the perfect choice for adaptive charger applications, low power microprocessor applications, voltage step-down converters, and voltage translation up or down for logic level shifting.

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