ISL95831CIRTZ Switching Controllers 3+1 Voltage Reg IMVP/VR12 CPUs Integrated Circuits ICs

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ISL95831CIRTZ Switching Controllers 3+1 Voltage Reg IMVP/VR12 CPUs

Compliant with IMVP-7/VR12TM, the ISL .95831C 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) technologyTM,
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 it's 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 VgooT voltage, programmable IMAX, TMAX,
adjustable switching frequency, OC protection and separate
Power-Good.

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

Applications
●IMVP-7/VR12 Compliant Computers

ISL95831CIRTZ refers to a specific integrated circuit (IC) manufactured by Intersil, which is a semiconductor

company now part of Renesas Electronics Corporation. The ISL95831CIRTZ is a multiphase buck controller

IC designed for voltage regulation in computer systems, particularly for powering the central processing unit

(CPU) and graphics processing unit (GPU).

Some key features of the ISL95831CIRTZ include:

1. Multi-phase operation: It supports up to four-phase operation, allowing for efficient power delivery and

voltage regulation.

1. Digital control: The IC utilizes a digital control interface, which enables flexibility and programmability

in power management settings.

1. Current sensing and protection: The ISL95831CIRTZ incorporates various protection mechanisms,

such as overcurrent protection, overvoltage protection, and undervoltage protection, to safeguard the

system components.

1. Power-saving features: It includes features like dynamic voltage positioning (DVP) and diode emulation

mode (DEM) to optimize power efficiency during different operating conditions.

5. Voltage identification (VID) support: The IC provides support for voltage identification, which allows for

fine-tuning the output voltage levels based on the specific requirements of the CPU or GPU.

5. Phase shedding: The ISL95831CIRTZ features phase shedding capability, which allows for adaptive

control of the number of active phases based on the load conditions. This helps to improve power

efficiency by reducing power consumption during light load scenarios.

5. Synchronous rectification: The IC employs synchronous rectification technology, which enhances power

conversion efficiency by reducing power losses during the switching process.

5. Power-good indicators: It includes power-good indicators that provide signals indicating the status of the

power outputs, ensuring proper power delivery and system stability.

5. External frequency synchronization: The ISL95831CIRTZ allows for external frequency synchronization,

enabling synchronization with an external clock source for improved system performance and noise reduction.

5. Thermal management: The IC incorporates thermal management features such as thermal warning and

thermal shutdown protection to prevent overheating and ensure safe operation.

5. Package and availability: The ISL95831CIRTZ is typically available in a compact and industry-standard

package, such as a QFN (Quad Flat No-Lead) package, making it suitable for a wide range of applications.