04 October 2012
Power management ics offer low quiescent current
Optimised for battery powered devices such as smartphones, tablets and digital cameras, ON Semiconductor's new power management ics are designed to provide multi channel operation and low quiescent current.
The NCP6924 integrates two 800mA, 3MHz step down dc/dc converters and four low dropout voltage regulators for a total quiescent current of just 105µA, while the NCP6914 integrates a single high efficiency 800mA, 3MHz step down dc/dc converter and four low dropout voltage regulators to deliver a quiescent current of just 72µA.
Featuring five and six voltage rails, both devices are sized to supply power to mixed signal modules such as cameras, or to complement power distribution to an application processor under minimum supervision.
"The NCP6924 and NCP6914 offer design engineers flexibility and performance, making them an ideal solution in power distribution for portable applications," said the company's Thibault Kassir. "Both devices save on board real estate by providing multiple strings of power distribution and allowing higher power densities to be distributed across the system, helping to solve thermal challenges."
Programming flexibility is offered through a 400kHz/3.4MHz I²C interface which controls power up sequencing, enables and disables output power and controls individual active output discharges.
Dynamic voltage scaling of the dc/dc converters allows the system to adjust core or IO voltages to load profiles when, for instance, the system goes into sleep mode. In addition, the on board low dropout voltage regulators can be directly supplied by one of the integrated dc/dc converters, reducing overall power losses.
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