LM21305SQ/NOPB

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PMIC - Voltage Regulators - DC DC Switching Regulators technology is a crucial component to enabling everyday use of products. Among the many different variants in the market, an example of a widely-applicable one is the LM21305SQ/NOPB.

At its core, the LM21305SQ/NOPB is a two-stage buck-boost regulator controller with a self-contained power switch. It’s comprised of an internal voltage reference, high voltage latch circuitry, a two-channel high-voltage PWM modulator, an over-current protection circuit, an under-voltage lockout circuitry, and other control logic that help fulfill the dynamic needs of a wide range of applications.

The LM21305SQ/NOPB is designed to offer premier performance without sacrificing its low-quiescent current operation capability. It has a 3MHz oscillator that supports fast transient response time and can provide high-accuracy regulation across the extended input range of 2.5V to 22V. It also features internal soft start and allows users to quickly tune control parameters thanks to its pre-bias start-up capability and fast line transient response.

Moreover, the LM21305SQ/NOPB is capable of low output voltage applications, making it suitable of use in battery-powered devices. The controller ensures that its output can remain in regulation with as low as 0.6V of input even with substantial load fluctuation. This eliminates the need of an auxiliary winding and comfortably fits into more hard-to-access cramped circuits.

Most conventional buck-boost devices will suffer from a noticeable decline in performance as the output voltage ramps down toward the minimum input voltage. But with the adaptive millisecond slew rate, the LM21305SQ/NOPB’s output voltage is able to accurately scale linearly down to the lowest power saving level without any sudden bumps or decline. This helps to maximize battery run-time and minimize heat dissipation.

In addition, the LM21305SQ/NOPB features a current limit circuit to protect itself from over-current operation, adjustable hysteresis, independent synchronization on each channel, and a VDD Monitor to shut down the controller when the input voltage falls below the minimum level required to maintain the system reliability.

The LM21305SQ/NOPB has a wide application field and can be used in mobile phones, digital cameras, notebook computers, and tablets. In terms of applications, its largest area of use is in battery-powered handheld devices to produce specific output voltages needed by the internal components. It is also used in automotive and industrial settings where the precise regulation of voltage is necessary.

In short, the LM21305SQ/NOPB is an ideal choice when it comes to PMIC - Voltage Regulators - DC DC Switching Regulators. Its adaptive linear step-down technology, flexibility and low-quiescent current operation make it suitable for power conscious consumer applications as well as industrial settings. With its comprehensive protection features, the LM21305SQ/NOPB ensures the durability and reliability of the entire system even in environments with heavy external noise.

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