TPS54218RTER Integrated Circuits (ICs)

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TPS54218RTER is a synchronous step-down Converter, SOT23 Staggered Current-Mode (SCM), which is designed for low-power applications. The TPS54218RTER is a 3A rated device for 5 volt DC and up to 8A current. It helps to reduce the power consumption in a wide range of products, and its switching frequency is adjustable up to 2.2MHz.

The TPS54218RTER application field covers portable equipment such as laptop, phones, tablet and etc. It operates at a wide input voltage range from 4.50V to 16V and output voltage range from 0.6V to 5.5V. The TPS54218RTER\'s high switching frequency and ripple current (CL= 1µF) are particularly advantageous when used in the high current applications, such as an auxiliary power supply for larger ASICs and processors.

Working Principle

TPS54218RTER works with the principle of voltage conversion. The device has an input section that receives a voltage from the load. This voltage is then fed through a transformer and converted into a lower voltage level, depending on the desired output. The output section of the device then takes that converted voltage and processes it with a synchronous rectifier and a low-pass filter before delivering it out. By using an adjustable soft-start and a cycle-skipping function, the TPS54218RTER provides system management efficiency and easy optimization.

The basic topology of the TPS54218RTER consists of a pulsed switching controller and a power switch section. The switching controller is designed to sense the output load current and provide feedback loop voltage control in order to maintain the output voltage. During the transition from the high voltage input to the low voltage output, the switching controller will adjust its switching frequency to ensure stable power delivery. The power switch section helps to condition the current and output voltage by controlling the switches in the inverting mode, as well as providing overcurrent and short circuit protection functionality.

The TPS54218RTER also features undervoltage protection to ensure that the input voltage stays within the specified range. When the input voltage falls below this range, the device will be shut off to prevent further damage. Additionally, the TPS54218RTER also offers output disable and enable features as well as thermal protection.

Overall, the TPS54218RTER is a powerful and efficient 3A step-down converter, offering excellent current and reliability to products requiring high switching frequency and ripple current.

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