The ISL8120 integrates two voltage-mode synchronous
buck PWM controllers to control a dual independent voltage
regulator or a 2-phase single output regulator. It has PLL
circuits and can output a phase-shift-programmable clock
signal for the system to be expanded to 3-, 4-, 6-, 12- phases
with desired interleaving phase shift. It also integrates
current sharing control for the power module to operate in
parallel, which offers high system flexibility.
It has voltage feed forward compensation to maintain a
constant loop gain for optimal transient response, especially
for applications with a wide input voltage range. Its
integrated high speed MOSFET drivers and multi-feature
functions provide complete control and protection for a
2/n-phase synchronous buck converter, dual independent
regulators, or DDR tracking applications (VDDQ and VTT
outputs).
The output voltage of a ISL8120-based converter can be
precisely regulated to as low as the internal reference
voltage 0.6V, with a system accuracy of ±0.6% over
commercial temperature and line load variations. Channel 2
can track an external ramp signal for DDR/tracking
applications.