MAX5061AUE

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The MAX5061AUE is a monolithic inductor-based DC-DC switching regulator controller from Maxim Integrated. It is an advanced single-output regulator that provides excellent transient response and minimal board area. It is designed to be used with an inductor and two external stage MOSFETs to enable the regulated voltage from power sources of up to 40V. The device can be used for a variety of applications, including point-of-load (POL) DC-DC converters, LED lighting, consumer electronics, automotive, and more.

The MAX5061AUE’s key features and specifications make it ideal for a variety of applications, including:

• Power Input: Up to 40V
• Regulated Output Voltage: Up to 24V
• Output Ripple Size: Less than 50mV
• Dynamic Load Step Response: Less than 20µs
• Switching Frequency: Up to 5MHz
• Current Mode PWM Control
• Integrated Synchronous Rectification
• Integrated Current Limit/Short Circuit Detection
• Integrated Soft-Start/Soft-Stop Control
• Low Component Count Design
• Low Total Solution Cost
• Ultra-Small Size: 1.45mm x 1.45mm (3.0mm²)

The MAX5061AUE’s versatile 7-pin design allows flexibility in configuring the controller to suit any application. It includes a dedicated PGOOD pin to monitor output voltage regulation, providing feedback to the power supply’s digital/analog monitoring features. The controller also features an integrated soft-start and soft-stop control, allowing for easy start-up, shut-down, and resetting of the operating parameters. Other features include an adjustable temperature-dependent current limit, allowing the user to set the current limit in order to protect the system and adjust the power consumption based on the temperature. The device also features a wide operating temperature range of -40 °C to +85 °C, making it suitable for a variety of applications and environments.

The MAX5061AUE’s main components and how they work are as follows.

The input voltage is applied to the input of the controller, where it is converted to a pulse-width modulated (PWM) signal and sent to the external driver stage. The driver stage is connected to two external MOSFETs and an inductor. The MOSFETs switch the current in the inductor at the frequency set by the internal PWM controller in the controller. The input voltage is compared to the voltage present at the feedback node (FB) at predetermined intervals to generate the PWM signal. This signal is used to control the gate drive of the external MOSFETs.

The inductor produces an alternating magnetic field and stores energy in the form of a magnetic field. As the MOSFETs switch and the current changes, energy is stored in the inductor. This energy is then discharged through the MOSFETs to produce the desired output voltage.

The MAX5061AUE also features several protection features to ensure safe and reliable operation. The integrated overvoltage protection (OVP) feature ensures that the output voltage does not exceed a predetermined threshold. The device also includes short-circuit protection in the form of integrated current limit detection, making it possible to set the current limit to protect the system. Additionally, the device includes an integrated thermal protection feature to ensure that the device does not overheat.

The MAX5061AUE’s features and specifications make it an ideal solution for a variety of applications, including point-of-load (POL) DC-DC converters, LED lighting, consumer electronics, automotive, and more. The device provides excellent transient response and minimal board area, making it a perfect fit for any size design. With its low component count, low cost solution, and ultra-small size, the MAX5061AUE is a great choice for any system.

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