LM3218SEX/NOPB

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LM3218SEX/NOPB Application Field and Working Principle

The LM3218SEX/NOPB is a monolithic switching step-up regulator which is ideal for applications involving ultra-low quiescent current and high power efficiency. It works as a voltage stabilizer, regulating the output voltage of the device to a predetermined constant value. This device is a member of PMIC – Voltage Regulators – DC DC Switching Regulators.

The LM3218SEX/NOPB offers high-efficiency step-up and buck-boost conversion with a wide input voltage range (2V to 6V). It operates with an input voltage range of 2V to 6V and an output voltage range of 3V to 15V, making it suitable for battery operated applications. The device is capable of providing up to 300mA of continuous output current and offers a power on reset to ensure that the output remains in regulation at power up.

The device offers various features such as short circuit protection, low-noise switching and high-efficiency over a wide operating range. The device integrates a low-noise switching regulator with a voltage reference and current limit control circuit. The current limit and modulation of the switching frequency are both adjustable, allowing for further optimization of the efficiency and output regulation accuracy.

The device is optimized with a high efficiency PWM control scheme, which reduces the losses and maintains a high efficiency at all load conditions. The device provides a high power efficiency of up to 95%, even at step-down ratios of up to 10:1. The device can operate at high switching frequencies, up to 2MHz, enabling the use of small external components. It also offers an output discharge FET which behaves like a short circuit protection.

The LM3218SEX/NOPB also offers optional features such as dynamic voltage scaling (DVS). DVS is a unique feature that allows for automatic adjustment of the output voltage. This is achieved by sensing and monitoring the current load and adjusting the output voltage accordingly. This helps reduce power consumption and improve the efficiency of the system.

Additionally, the LM3218SEX/NOPB offers a low BOM count function, requiring only an external MOSFET and capacitors. The device also offers an adjustable UVLO (Under-Voltage Lockout) function, which prevents the device from switching on at a voltage lower than the desired threshold. This helps protect the device and the system as a whole from low voltage conditions.

Overall, the LM3218SEX/NOPB is a versatile and efficient device, offering high performance and a wide range of features for step-up, step-down and buck-boost conversion applications. It is ideal for low power and standby applications.

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