DATASHEET
To request the full datasheet, please visit www.intersil.com/products/ISL95821 Three Phase PWM Controller for Intel VR12.5в„ў CPUs
ISL95821 Features The ISL95821 Pulse Width Modulation (PWM) controller IC
provides a complete low-cost solution for Intel VR12.5в„ў
compliant microprocessor core power supplies. It provides the
control and protection for a Voltage Regulator (VR). The VR
incorporates 3 integrated drivers and can operate in 3-, 2-or
1-phase configurations. The VR uses a serial control bus to
communicate with the CPU and achieve lower cost and smaller
board area. Serial data bus Configurable 3-, 2-or 1-phase output with integrated gate
drivers R3в„ў modulator
-Excellent transient response
-Phase shedding with power state selection
-Diode emulation in single-phase for high light-load
efficiency 0.5% system accuracy over-temperature The VR utilizes Intersil’s Robust Ripple Regulator R3
Technologyв„ў. The R3в„ў modulator has many advantages
compared to traditional modulators, including faster transient
response, variable switching frequency in response to load
transients, and improved light load efficiency due to diode
emulation mode with load-dependent low switching frequency. Supports multiple current sensing methods
-Lossless inductor DCR current sensing
-Precision resistor current sensing Differential remote voltage sensing The ISL95821 has several other key features. It supports either
DCR current sensing with a single NTC thermistor for DCR …