1
DATASHEET
To request the full datasheet, please visit www.intersil.com/products/isl95822
Dual-Phase PWM Regulator for VR12.5 and VR12.6 CPUs
ISL95822
Fully compliant with Intel VR12.5™ and VR12.6™
specifications, the ISL95822 provides a complete solution for
microprocessor core power supply. It provides a Voltage
Regulator (VR) with two integrated gate drivers. The VR can be
configured as 2- or 1-phase, providing maximum flexibility. The
VR uses the serial control bus (SVID) to communicate with the
CPU and achieves lower cost and smaller board area.
Based on Intersil’s Robust Ripple Regulator R3 Technology™,
the PWM modulator compared to traditional modulators, has
faster transient settling time, variable switching frequency
during load transients and has improved light load efficiency
with its ability to automatically change switching frequency.
The ISL95822 has several other key features. The output
supports DCR current sensing with single NTC thermistor for
DCR temperature compensation or accurate resistor current
sensing. The output comes with remote voltage sense,
programmable V
BOOT
voltage, programmable I
CCMAX
,
programmable voltage transition slew rate, adjustable
switching frequency, overcurrent protection and Power-Good
output.
Features
•Serial data bus
• Output configurable as 2- or 1-phase using two integrated
gate drivers
• Precision core voltage regulation
- 0.5% system accuracy over-temperature
- Enhanced load line accuracy
• Supports multiple current sensing methods
- Lossless inductor DCR current sensing
- Precision resistor current sensing
• Differential remote voltage sensing
•Programmable V
BOOT
voltage at start-up
• Resistor programmable I
CCMAX
and voltage transition
slew rate
• Diode braking overshoot reduction
• Adaptive body diode conduction time reduction
Applications
• Notebook computers
• Desktop computers
FIGURE 1. LOAD LINE REGULATION
1.71
1.72
1.73
1.74
1.75
1.76
1.77
1.78
1.79
1.80
0 5 10 15 20 25 30 35 40 45 50 55 60
V
IN
= 8.5V
V
IN
= 12V
V
IN
= 19V
V
OUT
(V)
I
OUT
(A)
September 20, 2013
FN8595.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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