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A buck converter (step-down converter) is a DC-to-DC power converter that reduces voltage from its input (supply) to its output while increasing current (load).
It belongs to a subcategory of switched-mode power supplies (SMPS) that typically includes at least two semiconductors (a diode and a transistor, though modern buck converters frequently replace the diode with a second transistor used for synchronous rectification) and at least one energy storage component, such as a capacitor, inductor, or the two separately or together.
In order to reduce voltage ripple, filters built of capacitors are typically attached to such a converter’s input (load-side filter) and output (occasionally in conjunction with inductors) (supply-side filter).The inductor that “bucks” or opposes the supply voltage gave it its name.
In comparison to linear regulators, which are more straightforward circuits that lower voltages by dissipating power as heat but do not step up output current, switching converters (such as buck converters) offer a far greater level of power efficiency as DC-to-DC converters.
Buck converters are useful for jobs like converting a computer’s primary supply voltage, which is often 12 V, down to lower voltages needed by USB, DRAM, and the CPU, which are typically 5, 3.3, or 1.8 V. Buck converters’ efficiency can be quite high, frequently exceeding 90%.
The Global Buck Regulator market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
A large selection of high-performance buck regulators with integrated FETs are available from Renesas. A DC/DC power converter called a buck converter, also referred to as a step-down converter, delivers voltage step-down and current step-up.
When the power source’s voltage exceeds Vin, the converter lowers the voltage. Typically, a buck converter offers the best option with the fewest external components.
For high-efficiency point-of-load DC-DC regulation, PI33/PI34/PI35xx ZVS Buck switching regulators provide board-level designers with maximum power density and flexibility.
With best-in-class power efficiency of up to 98%, the inclusion of a high-performance zero-voltage switching (ZVS) topology improves point-of-load performance. In a high-density System-in-Package, the ZVS regulators are tightly integrated with control circuitry, power semiconductors, and support components (SiP). Additionally, the gadget can be set up to run in constant current mode.