Multi-channel PMICs

6 February 2013 Power Electronics / Power Management

ON Semiconductor has introduced two new power management integrated circuits (PMICs) optimised for battery powered systems such as smartphones, tablets, digital cameras, GPS systems and other portable electronics. Utilising the latest power management techniques, the NCP6924 and NCP6914 are designed to optimise system efficiency and save battery life.

The NCP6924 integrates two 800 mA, 3 MHz step-down DC-DC converters and four low-dropout (LDO) voltage regulators for a total quiescent current of just 105 μA. The NCP6914 integrates a single 800 mA, 3 MHz step down converter and four LDO regulators to deliver a low quiescent current of just 72 μA.

Featuring five and six voltage rails, both of these devices are ideally sized to supply power to mixed-signal modules such as cameras, or to complement power distribution to an application processor under minimum supervision.

Programming flexibility is offered through a 400 kHz/3,4 MHz 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 I/O voltages to load profiles when, for instance, the system goes into sleep mode. In addition, the onboard LDO regulators can be directly supplied by one of the integrated DC-DC converters, considerably reducing overall power losses.

The DC-DC converters’ output voltage can be programmed from 0,6 V to 3,3 V in 12,5 mV steps and LDO regulators from 1,0 V to 3,3 V in 50 mV steps. Dedicated pins and registers for power-good and interrupt complete the feature set, providing the necessary supervision to report power failure.

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