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ISL6261
Data Sheet
September 27, 2006
FN9251.1
Single-Phase Core Regulator for IMVP-6 ?
Mobile CPUs
The ISL6261 is a single-phase buck regulator implementing
lntel ? IMVP-6 ? protocol, with embedded gate drivers.
The heart of the ISL6261 is the patented R 3 Technology?,
Intersil’s Robust Ripple Regulator modulator. Compared with
the traditional multi-phase buck regulator, the R 3
Technology? has faster transient response. This is due to
the R 3 modulator commanding variable switching frequency
during a load transient.
lntel ? Mobile Voltage Positioning (IMVP) is a smart voltage
regulation technology effectively reducing power dissipation
in lntel ? Pentium processors. To boost battery life, the
ISL6261 supports DPRSLRVR (deeper sleep) function and
maximizes the efficiency via automatically changing
operation modes. At heavy load in the active mode, the
regulator commands the continuous conduction mode
(CCM) operation. When the CPU enters deeper sleep mode,
the ISL6261 enables diode emulation to maximize the
efficiency at light load. Asserting the FDE pin of the ISL6261
in deeper sleep mode will further decrease the switching
frequency at light load and increase the regulator efficiency.
Features
? Precision single-phase CORE voltage regulator
- 0.5% system accuracy over temperature
- Enhanced load line accuracy
? Internal gate driver with 2A driving capability
? 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 voltage sensing at CPU die
? Overvoltage, undervoltage, and overcurrent protection
? Pb-free plus anneal available (RoHS compliant)
Ordering Information
A 7-bit digital-to-analog converter (DAC) allows dynamic
adjustment of the core output voltage from 0.300V to 1.500V.
PART NUMBER
(NOTE)
PART
MARKING
TEMP
RANGE
(°C)
PACKAGE PKG.
(Pb-FREE) DWG. #
The ISL6261 has 0.5% system voltage accuracy over
temperature.
A unity-gain differential amplifier provides remote voltage
ISL6261CRZ
ISL6261CRZ-T
ISL6261CRZ
ISL6261CRZ
-10 to +100 40 Ld 6x6
QFN
-10 to +100 40 Ld 6x6
L40.6x6
L40.6x6
sensing at the CPU die. This allows the voltage on the CPU
QFN, T&R
die to be accurately measured and regulated per lntel ?
IMVP-6 specification. Current sensing can be implemented
ISL6261CR7Z
ISL6261CR7Z -10 to +100 48 Ld 7x7
QFN
L48.7x7
through either lossless inductor DCR sensing or precise
resistor sensing. If DCR sensing is used, an NTC thermistor
network will thermally compensates the gain and the time
ISL6261CR7Z-T ISL6261CR7Z -10 to +100 48 Ld 7x7
QFN, T&R
L48.7x7
constant variations caused by the inductor DCR change.
ISL6261IRZ
ISL6261IRZ-T
ISL6261IRZ
ISL6261IRZ
-40 to +100 40 Ld 6x6
QFN
-40 to +100 40 Ld 6x6
L40.6x6
L40.6x6
QFN, T&R
ISL6261IR7Z
ISL6261IR7Z
-40 to +100 48 Ld 7x7
L48.7x7
QFN
ISL6261IR7Z-T
ISL6261IR7Z
-40 to +100 48 Ld 7x7
L48.7x7
QFN, T&R
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved. R 3 Technology? is a trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
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