Modern low voltage DC/DC converters have changed where the advantages of multiphase power conversion and point of load (POL) architectures can not be ignored. Point of load (POL) distributes the power via a high-voltage bus ( typ 12V) , and convert down to a lower voltage ( .6-3.3V) close to the point of use. This is similar to how power is delivered to your house. The voltage is sent over long distances at very high voltage and then converted down to 115v by a transformer close to your house. This reduces the power dissipation in the wire due to the wire resistance. High peak current demands also drives the move towards POL systems. Conventional POL solutions typical require two-stage conversion. The first conversion typically converts 12V input down to the rail voltage (typically 3.3V or 5V). The second POL converter produces the required output voltage (.6-2V). This approach reduces the system efficiency because each converter has power loss. Future POL converters will operate from any input voltage from 4.5V to 32V and will be more efficient since only one conversion will be required.
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