DATA SHORT
ISL6366
Dual 6-Phase + 1-Phase PWM Controller for VR12/IMVP7 Applications
The ISL6366 is a dual PWM controller; its 6-phase PWMs control
the microprocessor core or memory voltage regulator, while its
single-phase PWM controls the peripheral voltage regulator for
graphics, system agent, or processor I/O.
The ISL6366 utilizes Intersil’s proprietary Enhanced Active Pulse
Positioning (EAPP) modulation scheme to achieve extremely fast
transient response with fewer output capacitors.
The ISL6366 is designed to be compliant to Intel VR12/IMVP7
specifications. It accurately monitors the load current via the
IMON pin and reports this information via the IOUT register to
the microprocessor, which sends a PSI# signal to the controller
at low power mode via SVID bus. The controller enters 1 or
2-phase operation in low power mode (PSI1); in the ultra low
power mode (PSI2,3), it operates in single phase with diode
emulation option. In low power modes, the magnetic core and
switching losses are significantly reduced, yielding high
efficiency at light load. After the PSI# signal is de-asserted, the
dropped phase(s) are added back to sustain heavy load
transient response and efficiency.
Today’s microprocessors require a tightly regulated output voltage …
