DATASHEET
To request the full datasheet, please visit www.intersil.com/products/isl95833b Dual 2+1 PWM Controller for IMVP-7/VR12 CPUs
ISL95833B Features The ISL95833B Pulse Width Modulation (PWM) controller IC
provides a complete solution for IMVP-7/VR12в„ў compliant
microprocessor and graphic processor core power supplies. It
provides the control and protection for two Voltage Regulators
(VRs). The first VR, typically for VCORE, incorporates 1
integrated driver and can operate in 2-or 1-phase
configurations. The second VR, typically for graphics, is a
single phase regulator incorporating an integrated driver. The
two VRs share a serial control bus to communicate with the
CPU and achieve lower cost and smaller board area compared
with the two-chip approach. Serial data bus Both VRs utilize Intersil's Robust Ripple Regulator
R3 Technologyв„ў. The R3 modulator has numerous advantages
compared to traditional modulators, including faster transient
response, variable switching frequency during load transients,
and improved light load efficiency due to its ability to
automatically change switching frequency. Supports multiple current sensing methods
-Lossless inductor DCR current sensing
-Precision resistor current sensing The ISL95833B has several other key features. Both outputs
support either DCR current sensing with a single NTC
thermistor for DCR temperature compensation, or more
precise resistor current sensing if desired. Both outputs come …