Buck-boost regulator manages power for mobile applications

For the power supplies used in smartphones, tablets and other battery-powered mobile devices, Fairchild offers the FAN49103, buck-boost regulator, as part of the FAN49100 family.

It is 84 per cent smaller than its closest competitor, says the company, to save board space in any smartphone, tablet or mobile device. It can also solve the excessive heat and brownout issues that designers of mobile devices strive to overcome, says the company.

The regulator can reduce thermal issues by providing a system power rail at the lowest possible voltage. This thermal performance prevents the excessive heat that can impact a device’s ability to function normally. This is a key advantage for smartphones as their small size makes them particularly vulnerable to excess heat. It can also reduce or eliminate the need for heat sinks, which reduces bill of materials costs, simplifies the design and saves board space, says the company.

The fast transient response counters brownouts by enabling larger pulsed loads to be supported, which reduces the effect of battery droop. It supports large loads up to 2.5A DC and can maintain a constant regulated output over the entire battery range so the system will operate normally despite battery sags.

The regulator is available today in a 20-bump WLCSP that measure 1.6 x 2.0mm.



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