Applications

ISL95816
4-Phase PWM Controller for VR12.5 CPUs

Typical Diagram

enlarge +typical diagram

Key Features

    • Serial data bus
    • Configurable 4-, 3-, 2- or 1-phase
    • R3 Modulator
      • Excellent transient response
      • 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, VBOOT, voltage transition slew rate and switching frequency
    • Adaptive body diode conduction time reduction

Description

The ISL95816 Pulse Width Modulation (PWM) controller IC provides a complete solution for VR12.5™ compliant microprocessor core power supplies. It provides the control and protection for a Voltage Regulator (VR). The VR 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 numerous advantages compared to traditional modulators, including faster transient response, variable switching frequency during load transients, and improved light load efficiency due to its ability to automatically change switching frequency.

The ISL95816 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.

Applications

    • VR12.5 Notebook and Desktop Computers

Alternatives

Design Tip

What are the MOSFET Driver Dynamics and Current Sense Methods that one needs to be concerned about in PWM Converters?

See More »

Is there somewhere I can find out what simulations and models (e.g. Spice, PSpice, IBIS) are available on your website?

See More »

iSIM Simulator

Select a category to start designing:

Enter design requirements:

Min Max
Vin: V V
Vout Iout
Output: V A
Min Max
Vin: V V
Vout Iout
Output: V A
Desired Closed Loop Gain:
Desired Min. Bandwidth:

Support | Ask An Expert

Need tech support for a product or design?
(Support FAQs)

Ask »

Follow Us Intersil Wins Outstanding Achievement in Web Development

Find pricing and availability for your part number. Order Parts, Eval Boards and Samples

Contact Sales »

myINTERSIL

Sign in to your account…
Search Orders    
Please Wait...

Toolbar

Simply Smarter