DATASHEET
ISL62881, ISL62881B FN6924
Rev 3.00
June 16, 2011 Single-Phase PWM Regulator for IMVP-6.5в„ў Mobile CPUs and GPUs
The ISL62881 is a single-phase PWM buck regulator for
miroprocessor or graphics processor core power supply. It uses an
integrated gate driver to provide a complete solution. The PWM
modulator of ISL62881 is based on Intersil's Robust Ripple
Regulator (R3) technologyв„ў. Compared with traditional
modulators, the R3в„ў modulator commands variable switching
frequency during load transients, achieving faster transient
response. With the same modulator, the switching frequency is
reduced at light load, increasing the regulator efficiency. Features The ISL62881 can be configured as CPU or graphics Vcore
controller and is fully compliant with IMVP-6.5в„ў specifications. It
responds to DPRSLPVR signals by entering/exiting diode
emulation mode. It reports the regulator output current through
the IMON pin. It senses the current by using either discrete
resistor or inductor DCR whose variation over-temperature can
be thermally compensated by a single NTC thermistor. It uses
differential remote voltage sensing to accurately regulate the
processor die voltage. The adaptive body diode conduction
time reduction function minimizes the body diode conduction
loss in diode emulation mode. User-selectable overshoot …