LM3691TL-1.0/NOPB Integrated Circuits (ICs)

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The LM3691TL-1.0/NOPB is a monolithic, step-down DC-to-DC switching regulator that offers an ideal additional circuit or substitution for existing DC/DC applications. This device operates in the range of 3V up to 25V and is designed to operate in either step-down or voltage-inverting modes. It also offers a wide input range, low quiescent current and low output ripple with a minimum of external parts. The LM3691TL-1.0/NOPB is a highly accurate and efficient combination of integrated digital control, PMOS switching transistors and programmable feedback loop parameters. This device is able to provide automatic frequency folding, undervoltage lockout, current limit, and edge/skip mode features.

The application field for LM3691TL-1.0/NOPB can be classified broadly from any non-isolated switch mode operation in the DC-to-DC voltage conversion process. It is suitable for both point-of-load and distributed power and can be used to deliver stable power supply in different types of microcontroller and processor applications, including PCs, embedded systems, telecom and portable devices. Moreover, it can be used in a variety of other DC/DC applications and applications requiring high efficiency, which may need multiple supply rails, in-rush current control, and/or controlling high power LED arrays.

The finely tuned working principle of the LM3691TL-1.0/NOPB is based on the power MOSFET switch and control circuitry combination, in a single package. The integrated MOSFET switch is used to select the desired output voltage and the control circuitry provided, together with the LM3691TL-1.0/NOPB digital core, adapts the feedback loop for required system performance. The device operates in a feedback-controlled buck mode, which enables maximum load current and loop stability to be achieved with a minimum of external components. The device utilizes an advanced voltage-mode control topology, allowing for support of fast transient responses, as well as adaptive features such as automatic frequency-folding, under-voltage lockout, and hysteretic current T/C.

The advanced architecture of LM3691TL-1.0/NOPB allows for adjustable switching frequency up to 2MHz and an adjustable current-limit threshold that can be set to match the maximum current consumption of the load. The device also offers a low-noise option, which enables the use of an external filter capacitor to reduce the effects of high-frequency switching noise. An additional standby feature allows the device to enter a low-current sleep mode when the load current is reduced, further reducing power consumption.

In conclusion, the LM3691TL-1.0/NOPB is a highly efficient and feature-rich DC-to-DC voltage regulator with a wide input range, low quiescent current, and low output ripple. Its advanced architecture allows for versatile operation, fast transient responses, and adaptive features that improve system performance. Additionally, its standby option allows it to conserve power when it is not required. The versatile nature of the LM3691TL-1.0/NOPB makes it a suitable solution for many DC/DC applications, and its competitive pricing makes it a cost-effective choice.

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