The ISL95712HRZ-T is fully compliant with AMD Fusion™ SVI 2.0 and provides a complete solution for microprocessor and graphics processor core power. The ISL95712HRZ-T controller supports two Voltage Regulators (VRs) for Core and Northbridge outputs. The Core VR can be configured for 4-, 3-, 2-, or 1-phase operation while the Northbridge VR supports 3-, 2- or 1-phase configurations for maximum flexibility. The two VRs share a serial control bus to communicate with the AMD CPU and achieve lower cost and smaller board area compared with two-chip solutions. The PWM modulator is based on Intersil’s Robust Ripple Regulator R3™ Technology. Compared to traditional modulators, the R3™ modulator can automatically change switching frequency for faster transient settling time during load transients and improved light load efficiency. The ISL95712HRZ-T has several other key features. Both outputs support DCR current sensing with a single NTC thermistor for DCR temperature compensation or accurate resistor current sensing. They also utilize remote voltage sense, adjustable switching frequency, OC protection and power-good indicators.
Feature
- Supports AMD SVI 2.0 serial data bus interface and PMBus
- Serial VID clock frequency range 100kHz to 25MHz
- Dual output controller with 12V integrated core gate drivers
- Precision voltage regulation
- 0.5% system accuracy over-temperature
- 0.5V to 1.55V in 6.25mV steps
- Enhanced load line accuracy
- Supports multiple current sensing methods
- Lossless inductor DCR current sensing
- Precision resistor current sensing
- Programmable 1-, 2-, 3- or 4-phase for the core output and 1- , 2- or 3-phase for the Northbridge output
- Adaptive body diode conduction time reduction
- Superior noise immunity and transient response
- Output current and voltage telemetry
- Differential remote voltage sensing
- High efficiency across entire load range
- Programmable slew rate
- Programmable VID offset and droop on both outputs
- Programmable switching frequency for both outputs
- Excellent dynamic current balance between phases
- Protection: OCP/WOC, OVP, PGOOD and thermal monitor
- Small footprint 52 Ld 6x6 QFN package
- Pb-free (RoHS compliant)
