The proliferation of power management functions in the typical mobile phone, and
the volumes associated with each phone model, argues for customization and ASIC
integration. While the need to manipulate voltages and currents are contrary to the use of
fi ne-geometry CMOS and integration with the digital baseband or applications processor,
PMICs with many voltage regulators on one chip can be constructed with bipolar CMOS
and CMOS technologies.
A new standalone PMIC includes 20 separate voltage regulators, a boost converter for
white LED drives, a built-in battery monitor-and-charger, and a USB interface. ...
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