LMZ20501EVM

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The LMZ20501EVM, available from Texas Instruments, is an evaluation module (EVM) for evaluation of the LMZ20501 3-V to 10-V ultra-high efficiency step-down DC/DC converter. This device is used in a wide variety of electronic applications, from low-power IoT (Internet of Things) devices to high-power industrial systems. It is designed to provide a high degree of efficiency, with efficiencies reaching over 90%. This makes it an ideal choice for applications where power consumption and thermal issues are of concern. Additionally, the device is available in both surface-mount and through-hole packages, making it a versatile component that can be used in a variety of different designs.

The LMZ20501EVM is designed for use with a wide variety of DC/DC power supplies, ranging from 3-V to 10-V output. The output voltage is set using the onboard voltage adjust resistors. The output voltage can also be adjusted using external resistors to fine-tune the output voltage level. The output voltage range is adjustable from the onboard connectors, allowing for both high and low voltage applications to be safely used with the device. Additionally, the output voltage swing is also adjustable with a range of 0.95V to 1.6V. This allows the device to be used as a direct replacement for a wide variety of legacy devices.

The LMZ20501EVM also comes with an onboard voltage supervisor. This provides overvoltage protection for the power supply and ensures that it is only delivering the intended voltage to the load. This feature adds an additional layer of protection to the power supply, protecting both the load and the power supply itself. Additionally, the LMZ20501EVM also comes with current limit protection, ensuring that the power supply never delivers more current than it can safely handle.

In terms of the working principle of the LMZ20501EVM, it utilizes a synchronous rectification topology. This topology utilizes a positive and negative side to the power supply, each of which contains a MOSFET. This combination of MOSFETs allows for extremely efficient power conversion. The synchronous rectification power supply also provides a significantly reduced output current ripple, allowing for more precise and stable power delivery to the load.

When the negative side of the power supply is powered, the associated MOSFETs are enabled and the power supply starts to run. The MOSFETs will continually switch between conducting and dissipating, allowing the power supply to produce a steady output voltage level. This switching also allows for cooling of the power supply, as the MOSFETs will dissipate any excess heat generated by the converter. Additionally, this topology allows the LMZ20501EVM to run at extremely low output voltages, down to 0.5V, making it an ideal choice for low voltage applications.

In conclusion, the LMZ20501EVM is a high-performance DC/DC converter, with a wide output voltage range and high efficiency. The onboard voltage supervisor and current limit protection make this device a reliable component for many industrial and IoT applications. Additionally, the use of synchronous rectification in the LMZ20501EVM ensures high efficiency with reduced output current ripple, making it an ideal choice for a wide variety of power conversion needs.

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