The ISL6262A is a two-phase buck converter regulator

implementing Intel? IMVP-6+ protocol with embedded gate

drivers. The two-phase buck converter uses two interleaved

channels to effectively double the output voltage ripple

frequency, and thereby reduce output voltage ripple

amplitude with fewer components; lower component cost;

reduced power dissipation; and smaller real estate area.

The heart of the ISL6262A is the patented R3 Technology?,

Intersil’s Robust Ripple Regulator modulator. Compared with

the traditional multiphase buck regulator, the R3

Technology? has the fastest transient response. This is due

to the R3 modulator commanding variable switching

frequency during a load transient.

Intel? Mobile Voltage Positioning (IMVP) is a smart voltage

regulation technology, which effectively reduces power

dissipation in Intel? Pentium processors. To boost battery

life, the ISL6262A supports DPRSLPVR (deeper sleep),

DPRSTP# and PSI# functions, and maximizes the efficiency

via automatically enabling different phase operation modes.

At heavy load operation of the active mode, the regulator

commands the two phase continuous conduction mode

(CCM) operation. While the PSI# is asserted with medium

load in active mode, the ISL6262A smoothly disables one

phase and operates in one-phase CCM. When the CPU

enters deeper sleep mode, the ISL6262A enables diode

emulation to maximize the efficiency at light load.

For better system power management of the portable

computer, the ISL6262A also provides a CPU power monitor

output. The analog output at the power monitor pin can be

fed into an A/D converter to report instantaneous or average

CPU power.

A 7-bit digital-to-analog converter (DAC) allows dynamic

adjustment of the core output voltage from 0.300V to 1.500V.

A 0.5 system accuracy of the core output voltage

over-temperature is achieved by the ISL6262A.

A unity-gain differential amplifier is provided for remote CPU

die sensing. This allows the voltage on the CPU die to be

accurately measured and regulated per Intel? IMVP-6+

specifications. Current sensing can be realized using either

lossless inductor DCR sensing, or precision resistor sensing.

A single NTC thermistor network thermally compensates the

gain and the time constant of the DCR variations.

Features

? Precision Two/One-phase CORE Voltage Regulator

- 0.5 System Accuracy Over-Temperature

- Enhanced Load Line Accuracy

? Internal Gate Driver with 2A Driving Capability

? Dynamic Phase Adding/Dropping

? Microprocessor Voltage Identification Input

- 7-Bit VID Input

- 0.300V to 1.500V in 12.5mV Steps

- Support VID Change On-the-Fly

? Multiple Current Sensing Schemes Supported

- Lossless Inductor DCR Current Sensing

- Precision Resistive Current Sensing

? CPU Power Monitor

? Thermal Monitor

? User Programmable Switching Frequency

? Differential Remote CPU Die Voltage Sensing

? Static and Dynamic Current Sharing

? Overvoltage, Undervoltage, and Overcurrent Protection

? Pb-Free (RoHS Compliant)