Phoenix, Ariz.—ON Semiconductor's NCP1526 is a synchronous buck regulator with LDO for powering
"application microprocessors" and associated RF circuitry in higher density multimedia portable devices such as portable media players (PMPs), MP3 players and DMB or DVB-H mobile TV chipsets in cellular phones.
"The NCP1526 is the first integrated converter on the market that is housed in an ultrathin 0.55-mm UDFN package, which is thinner than a flip-chip package and fits nicely into a slim portable design," said Marie Capron, director of Low Voltage Power Management products. "It allows designers to differentiate their products by adding an extra application processor anytime, without waiting for the upgrade of the power management unit. In the fast-turning portable market, this design flexibility helps reduce board re-design time and enables manufacturers to get their new, slim models with extra functions to the market faster than their competitors."
The chip delivers a fixed 1.2 volts at up to 400 mA from a 2.7-5.2 volt input. It touts fast transient response, and thus is suited to powering the microprocessor's digital core. The NCP1526's 3 MHz switching frequency minimizes the size of external components (e.g., 1-to- 4.7 microhenry choke). The low-noise LDO provides 150 mA at 2.8 volts for the portable device's RF stages. Value-added features include soft-start, cycle-by-cycle current limiting, and thermal shutdown protection.
Click here for the device datasheet. The device is priced at 90 cents each in 3k-quantities.
ON Semiconductor, 1-602-244-6600, www.onsemi.com