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Power management IC eyes mobile GPS

Posted: 10 Jul 2008 ?? ?Print Version ?Bookmark and Share

Keywords:power management IC? MPIC? mobile GPS designs?


The AAT2603 from Advanced Analogic Technologies, a power management IC targeted at mobile GPS devices, portable media players (PMPs) and other handheld mobile systems operating off a single Li-ion battery, integrates two step-down converters and four independent LDOs in a 4mm x 4mm TDFN package.

"Today's portable GPS devices and PMPs demand an increasingly wide array of power functions as they extend their feature sets," said Siamak Bastami, product line director. "By integrating six channels, featuring two buck converters, one with a two-step dynamic output voltage, with four LDOs and independent enable functions, the AAT2603 provides designers maximum design flexibility and power-up sequencing while offering the opportunity to reduce PCB space, improve reliability and reduce cost."

The AAT2603, working off a 2.7V to 5.5V source, touts high efficiency across the entire load range. One step-down converter supports functions requiring high output current and low-dropout voltage (200mV). The second step-down converter delivers 600mA and includes two-step dynamic output voltage capability to match the needs of common system processors. The converter dynamically shifts between the two output voltages by toggling the SELB2 pin.

Four LDOs supply power to a variety of system functions. Two of the LDOs, designed for noise-sensitive circuits, deliver 200mA. The second pair of LDOs delivers 400mA. Each of the four LDOs draws just 50?A of quiescent current.

The chip features protection against short-circuit, overcurrent, and overtemperature conditions.

The AAT2603, qualified across the -40C to 85C temperature range and available in a Pb-free, 28-pin, 4mm x 4mm TQFN package, is priced at $1.64 in 1,000 quantities.

- Vince Biancomano
Power Management DesignLine

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