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The ISL6262 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 ISL6262 is 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 ISL6262 supports DPRSLRVR (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 at the medium

load in the active mode, the ISL6262 smoothly disables one

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

enters deeper sleep mode, the ISL6262 enables diode

emulation to maximize the efficiency at the light load.

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 ISL6262.

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-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

? Thermal Monitor

? User Programmable Switching Frequency

? Differential Remote CPU Die Voltage Sensing

? Static and Dynamic Current Sharing

? Overvoltage, Undervoltage, and Overcurrent Protection

? Pb-Free Plus Anneal Available (RoHS Compliant)