ISL95854

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Single Phase PWM Regulator for IMVP8™ CPUs

OVERVIEW

The ISL95854, fully compliant with Intel IMVP8™ specifications, provides a complete solution for microprocessor core power supply. It also provides a Voltage Regulator (VR) with an integrated gate driver. 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 ISL95854 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 VBOOT voltage, programmable ICCMA X, programmable voltage transition slew rate, adjustable switching frequency, overcurrent protection and power-good output.

KEY FEATURES

  • Serial data bus
  • Single output VR with integrated gate driver
  • 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 VBOOT voltage at start-up
  • Resistor programmable ICCMAX and voltage transition slew rate
  • Adaptive body diode conduction time reduction
  • System input power monitor

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL95854
Basic Information
Production Status
Mass Production
Input Voltage Min (V)
4.5
Input Voltage Max (V)
25
Output Voltage Min (V)
0.25
Output Voltage Max (V)
1.52
Output Current Max (A)
30
VBIAS (min)
4.75 V
VBIAS (max) (V)
5.25
IS (min)
1 µA
IS (typ)
4.5 mA
Parametric Applications
Notebook & Desktop Computers
Qualification Level
Standard
VID
Yes
VRM
IMVP8
Bias Voltage Range (V)
4.75 to 5.25
Temperature Range
-40 to +100

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