ISL95820

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Green Hybrid Digital Four Phase PWM Controller for Intel VR12.5™ CPUs

Product Status: Mass Production

OVERVIEW

The ISL95820 Pulse Width Modulation (PWM) controller IC provides a complete low-cost solution for Intel VR12.5™ 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 4-, 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. The VR utilizes Intersil’s Robust Ripple Regulator R3 Technology™. The R3™ 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. The ISL95820 has several other key features. It supports either DCR current sensing with a single NTC thermistor for DCR temperature compensation, or more precise resistor current sensing if desired; remote voltage sense; programmable VBOOT voltage, IMAX , voltage transition slew rate and switching frequency; adjustable overcurrent protection; and Power-Good signal.

KEY FEATURES

  • Serial data bus
  • SMBus/PMBus/I2C interface with SVID conflict free
  • Configurable 4-, 3-, 2- or 1-phase for the output using three integrated gate drivers
  • Green Hybrid Digital R3™ 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
  • 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 IMAX, load line, diode emulation, slope compensation, and switching frequency
  • Adaptive body diode conduction time reduction

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL95820
Basic Information
生产状态
Mass Production
最大输出数
1
最大相位数
4
输入电压最小值 (V)
4.5
输入电压最大值 (V)
28
输出电压最小值 (V)
0.5
输出电压最大值 (V)
2.3
输出电流最大值 (A)
120
偏置电压范围 (V)
4.75 to 5.25
VID
Yes
参数应用
VR12.5
资质级别
Standard
下降
Yes
集成MOSFET驱动器
Yes
CAN 采样
YES
温度范围
-40 to +85

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