MAX16938ATERB/V+

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MAX16938ATERB/V+ is a device that provides a simple, yet robust design solution for different DC to DC conversion applications, including Power Distribution (PD), Automotive, Industrial and Medical systems. This device offers high efficiency, low quiescent current, and fast transient response with high output accuracy and reliability for applications where small size and low power consumption are needed. This article will describe the application field and working principle of this DC to DC converter.

Applications

The MAX16938ATERB/V+ is ideal for automotive, industrial, and medical systems and fulfills the stringent requirements like low quiescent current, extreme temperature operation and fast transient response. It provides flexible wide input and output voltage range of 2.7V to 5.5V and 0.8V to 5.5V respectively, allowing it to support both 12V and 24V automotive applications, as well as other industrial and medical systems.

Due to their small size and high efficiency, the MAX16938ATERB/V+ DC-DC converters are perfect for applications like personal multimedia players, digital cameras, cell phones and other portable products. The ultra-low input current in no load state and standby mode makes the converter ideally suited for battery-powered applications and helps to increase battery life. It also features a programmable synchronous buck topology, which significantly improves power efficiency and reduces power losses.

The MAX16938ATERB/V+ converter also includes many key features that make it an ideal device in many applications. These features include an external synchronization option, a fast transient response, a programmable over voltage protection, and a variety of output voltage settings. This device also provides an integrated switching regulator circuit that uses a fixed frequency, a current mode control and a single stage feedback, in order to ensure that the desired output voltage is accurately regulated and maintained even under transient and dynamic conditions.

Working Principle

The MAX16938ATERB/V+device includes a high performance synchronous buck converter that takes a wide input voltage from 2.7V to 5.5V and converts it down to a low output voltage from 0.8V to 5.5V. It is a switching type DC-DC converter with a fixed frequency of 500kHz, current mode control, and single stage feedback.

The MAX16938ATERB/V+ converter’s operation can be divided into two parts: the input stage and the output stage. The input stage consists of an inductor and two switches, a low side switch and a high side switch. These switches are driven by a current mode control.

During the normal operation, the high side switch is on and the low side switch is off. The inductor stores energy and current as magnetic field between the switches. As the current grows, the inductor’s magnetic field increases until the current reaches the upper limit, and it is forced to saturate.

When the inductor is saturated, the high side switch is turned off and the low side switch is turned on. As the low side switch is on, the energy stored in the inductor is released, reducing the magnetic field and the current. This energy is lost as heat.

The output stage of the MAX16938ATERB/V+ converter contains a feedback loop that controls the voltage accuracy. It includes a voltage divider, a reference voltage, and a voltage error amplifier (VEA). The VEA compares the output voltage from the divider to the reference voltage, so that the output voltage remains accurate.

The MAX16938ATERB/V+ device also provides several programmable features such as a programmable maximum duty cycle that adjusts the output current limit, and a programmable over voltage protection. It also supports an external synchronization option, which can be used to synchronize multiple MAX16938ATERB/V+ converters in order to reduce EMI/RFI and improve efficiency.

Conclusion

The MAX16938ATERB/V+ DC-DC converter is a device that is ideal for automotive, industrial, and medical systems, as it meets their stringent requirements and allows for a flexible input and output voltage range. It features a programmable synchronous buck topology, an external synchronization option, fast transient response, and several features to improve power efficiency and reduce power losses. With its ease of use, wide input/output voltage range and integrated regulator topology, the MAX16938ATERB/V+ is the perfect device for a variety of applications.

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