ISL95853 Datasheet, PDF (1/2 Pages) Intersil Corporation – Multiphase PWM Regulator for IMVP8 CPUs

DATASHEET
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Multiphase PWM Regulator for IMVP8™ CPUs
ISL95853
The ISL95853, fully compliant with Intel IMVP8™
specifications, provides a complete solution for
microprocessor core power supply. It also provides a Voltage
Regulator (VR) with two integrated and one external gate
drivers. The VR can be configured as 3-, 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 ISL95853 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 3-, 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
• Adaptive body diode conduction time reduction
• System input power monitor
Applications
• Notebook computers
• Desktop computers
0.91
0.90
0.89
0.88
0.87
0.86
0.85
0.84
0.83
0.82
0.81
0.80
0
V_IN = 19V
V_IN = 12V
V_IN = 8V
6 12 18 24 30 36 42 48 54 60 66
I_OUT (A)
FIGURE 1. LOAD LINE REGULATION
May 6, 2015
FN8606.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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