LM2703EV

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The LM2703EV is a monolithic switching regulator specifically designed for notebook and other low power off-line applications. The device employs a peak current mode regulating pulse-width modulation (PWM) with excellent line/load regulation characteristics. It is specially designed for low power applications which require very small external components.

The LM2703EV belongs to the evaluation boards of DC/DC & AC/DC (Off-Line) SMPS. It allows the device to be used with either DC or AC input sources, and its two separate regulated outputs ensure optimized power and performance. It includes a high-performance, low-noise voltage conversion controller, and the package also contains several external components to enable the user to quickly evaluate the suitability of the device for their design.

The device offers protection features which include over-voltage, short-circuit and temperature protection. It is fully integrated, requiring no additional components or external signals. The core frequency of the output switching can be modified to further optimize the power consumption of the system.

The working principle of the LM2703EV is based on PWM, which requires a feedback loop to control the output voltage. This feedback loop consists of an error amplifier, a power switch, and external components to form a closed loop. The error amplifier compares the reference voltage with the measured output voltage and gives a voltage control for the output stage. The power switch operates at the core frequency, and the output voltage is monitored by the error amplifier.

The output voltage can be set with an external resistive divider, and the LM2703EV has internal circuits that allow the over-voltage and over-temperature protection of the output. The power switch is triggered by a signal from the output voltage sensing circuit, and is disabled when the device reaches its over-voltage or over-temperature thresholds.

The LM2703EV provides a low-cost solution for off-line applications which require multiple regulated outputs. It has a wide operating voltage range, which makes it suitable for applications operating under various AC or DC power sources. It also includes a comprehensive protection feature which is essential for safe and reliable operation.

In summary, the LM2703EV is a monolithic switching regulator specially designed for notebook and other low power applications. It belongs to the evaluation boards of DC/DC & AC/DC (Off-Line) SMPS and offers excellent line/load regulation characteristics. The device is based on PWM, and includes various protection features to provide a safe and reliable operation. It is a low-cost solution for applications which require multiple regulated outputs.

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