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Dual-output LDOs target portable devices

Posted: 26 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:portable devices? dual-output LDO? low dropout?


ON Semiconductor has released the NCP590 family of a high precision, dual-output CMOS LDOs designed for battery-powered consumer and microprocessor-controlled portable applications such as cellphones, PDAs, GPS and portable media players.

The NCP590 family is capable of delivering up to 300mA per output. A special combination of process and architecture is employed to offer fast customer response and outstanding flexibility. Voltages from 0.8V to 5V are available to accommodate the varied needs of customers.

The LDOs are stable with any type of capacitor and under no-load conditions and the set point output voltage is accurate to within 0.9 percent with an operating voltage input up to 5.5V meeting very tight overall error budget requirements of high-performance applications. With its low dropout characteristics (150mV@Iout=300mA) and low ground current consumption, the devices retain regulation longer and extend battery usage.

In addition, two independent ENABLE pins with sub-1V thresholds allow increased flexibility, supporting the latest ASIC chipset and power management unit platforms. Protected against short circuit, undervoltage lockout and thermal overload conditions, the NCP590 is a robust solution that helps maintain high system level performance. During transient events, the NCP590 maintains accurate regulation due to its internally compensated regulator. When disabled, the internal active discharge circuitry accelerates desired output response.

The NCP590 is offered in a 2mm x 2mm x 0.9mm DFN-8 package and priced at 37 cents per unit in 10,000-unit quantities.

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