ISL95831C

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3+1 Voltage Regulator for IMVP-7/VR12™ CPUs

OVERVIEW

Compliant with IMVP-7/VR12™, the ISL95831C provides a complete solution for microprocessor and graphic processor core power supply. It provides two Voltage Regulators (VRs) with three integrated gate drivers. The first VR can be configured as 3-, 2- or 1-phase VR while the second output is 1-phase VR, providing maximum flexibility. The two VRs share the serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with the two-chip approach.

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 ISL95831C has several other key features. Both outputs support DCR current sensing with single NTC thermistor for DCR temperature compensation or accurate resistor current sensing. Both outputs come with remote voltage sense, programmable VBOOT voltage, programmable IMAX , TMAX , adjustable switching frequency, OC protection and separate Power-Good.

KEY FEATURES

  • Serial Data Bus
  • Dual Outputs:
  • Configurable 3-, 2- or 1-phase for the 1st Output using 2 integrated Gate Drivers
  • 1-phase for the 2nd Output using an Integrated Gate Driver
  • 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, TMAX for Both Outputs
  • Adaptive Body Diode Conduction Time Reduction

PARAMETRICS

Parameters
ISL95831C
Basic Information
Production Status
量産中
出力最大数
1
位相最大数
3
入力電圧 (V) (min)
4.5
入力電圧 (V) (max)
25
出力電圧 (V) (min)
0.25
出力電圧 (V) (max)
1.52
出力電流 (A) (max)
90
バイアス電圧範囲 (V)
4.75 to 5.25
VID
Yes
パラメトリックアプリケーション
VR12/IMVP7
認定レベル
Standard
ドループ
Yes
集積MOSFETドライバ
Yes
CANサンプル
YES
温度範囲
-40 to +100

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