Advanced Pulse Width Modulation Controller ICs for DC-DC Converters

This book describes power management ICs to tackle
the challenges for both accurate and efficient power
delivery for today''s high performance processors.
A double-edge multi-phase low-latency pulse width
modulator IC is implemented in 0.18 um CMOS process
with 0.04 mm2 active area and demonstrates a fast
double-edge pulse width modulation scheme which is
important for achieving fast controller response for
high bandwidth applications. A multi-mode 4-phase
digital IC controller for voltage regulator
application is implemented in 0.18 um CMOS process
with 4 mm2 active area. The controller combines load
current feedforward with voltage mode feedback to
achieve fast transient response and multi-mode
control strategy improves the converter efficiency by
at least a factor of ten in light load condition. A
load-scheduled integrator array is developed in the
controller IC which improves the load transient
response when voltage regulator transitions between
continuous conduction mode and discontinuous
conduction mode.

Autorentext

Jianhui Zhang received Ph.D. degree from University ofCalifornia, Berkeley in electrical engineering in 2006. He iscurrently the design manager at National SemiconductorCorporation focusing on research and development of powermanagement circuitsassociated with renewable energy and battery management systemfor hybrid and electric vehicle.

Klappentext

This book describes power management ICs to tacklethe challenges for both accurate and efficient powerdelivery for today's high performance processors.A double-edge multi-phase low-latency pulse widthmodulator IC is implemented in 0.18 um CMOS processwith 0.04 mm2 active area and demonstrates a fastdouble-edge pulse width modulation scheme which isimportant for achieving fast controller response forhigh bandwidth applications. A multi-mode 4-phasedigital IC controller for voltage regulatorapplication is implemented in 0.18 um CMOS processwith 4 mm2 active area. The controller combines loadcurrent feedforward with voltage mode feedback toachieve fast transient response and multi-modecontrol strategy improves the converter efficiency byat least a factor of ten in light load condition. Aload-scheduled integrator array is developed in thecontroller IC which improves the load transientresponse when voltage regulator transitions betweencontinuous conduction mode and discontinuousconduction mode.