LM3691TL-1.8/NOPB

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LM3691TL-1.8/NOPB is a device belonging to the DC DC Switching Regulator category of Power Management Integrated Circuits (PMIC). It provides an easy to use solution to achieve precise and efficient DC output regulation by driving an external N-channel MOSFET.

Features

The LM3691TL-1.8/NOPB has several unique features, including:

• Low switching frequency: The switch frequency is 200kHz to 1MHz ,which conserves board space and also increases efficiency.
• Internal compensation: Internal components compensate for the output voltage to ensure accuracy, reducing the cost of external components.
• Voltage feed-forward: This feature reduces output voltage transients and provides improved line regulation.
• Selectable Burst Mode operation: This feature can be enabled or disabled, providing the user with the ability to tailor the part to their application.
• High power density: The small size and low frequency of the device reduce board space, increasing the power density.
• Adaptive on-time control: This feature reduces output ripple, providing for clean and stable outputs.

Applications

The LM3691TL-1.8/NOPB device is well suited for use in a variety of applications, including:

• Notebook and desktop computer power systems
• Industrial and medical power systems
• Telecom power systems
• Embedded controllers
• Portable electronics

The LM3691TL-1.8/NOPB is specifically designed to provide low-cost, accurate and efficient DC output regulation. The device\'s low switching frequency, voltage feed-forward and adaptive on-time control features make it an ideal choice for applications that require a switch mode solution. The integrated compensation eliminates the cost of external components, reducing the overall bill of materials.

Working principle

The LM3691TL-1.8/NOPB consists of an internal voltage regulator, comparator, error amplifier, and an external N-channel MOSFET. During operation, an input voltage is applied to the device. An internal voltage reference is compared to the feedback voltage, and a pulse width modulated signal is generated. This signal is applied to the gate of the MOSFET to regulate the output voltage.

The internal error amplifier adjusts the on time of the MOSFET as necessary to achieve the desired output voltage. The pulse width modulated signal is then applied to the gate of the MOSFET to regulate the output voltage. As the output voltage deviates from the desired set point, the error amplifier adjusts the on time of the MOSFET to maintain the desired output voltage.

The voltage feed-forward feature is enabled when the external synchronization pin is connected to the circuit ground. This feature reduces transition time in response to line transients, providing for cleaner and stable output voltages.

Conclusion

The LM3691TL-1.8/NOPB is an easy to use device for achieving precise and efficient DC output regulation. The device is well suited for applications requiring a low-cost, accurate and efficient switch-mode solution. Its low switching frequency, voltage feed-forward and adaptive on-time control features make it an ideal choice for applications that require a switch mode solution.

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