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500mA step-down dc-dc converter

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article image Reset output warns the system of impending power loss, allowing safe shutdown.

MAXIM Integrated Products, represented in Australia by Arrow Electronics , has released the MAX8620Y, a micro power-management integrated circuit (microPMIC). It integrates a 500mA step-down dc-dc converter, two 300mA low-dropout linear regulators and a 30ms reset into a 9mm x 9mm x 0.8mm TDFN package.

Applications include mobile phones, smartphones and MP3 players. The 4MHz synchronous step-down dc-dc converter provides up to 92% efficiency and uses a low-profile 1μH inductor and tiny ceramic capacitors. Its 100ns transient response fits demanding processor applications like graphics processing, video streaming and gaming. The two LDOs provide a low-noise 45μV rms output and their output voltages are pin-programmable to save size and maintain flexibility. The reset output warns the system of impending power loss, allowing safe shutdown.

The MAX8620Y is available in a 3mm x 3mm, 14-pin TDFN package, screened for the extended-industrial temperature range from -40ºC to 85ºC. The MAX8620YEVKIT evaluation kit is available to speed designs.

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