September 27, 2006
Single-Phase Core Regulator for IMVP-6®
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 R3 Technology™,
Intersil’s Robust Ripple Regulator modulator. Compared with
the traditional multi-phase buck regulator, the R3
Technology™ has faster transient response. This is due to
the R3 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.
A 7-bit digital-to-analog converter (DAC) allows dynamic
adjustment of the core output voltage from 0.300V to 1.500V.
The ISL6261 has 0.5% system voltage accuracy over
A unity-gain differential amplifier provides remote voltage
sensing at the CPU die. This allows the voltage on the CPU
www.dDiaetatoShbeeeta4cUc.ucoramtely measured and regulated per lntel®
IMVP-6 specification. Current sensing can be implemented
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
constant variations caused by the inductor DCR change.
• 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)
PART NUMBER PART
(Pb-FREE) DWG. #
ISL6261CRZ -10 to +100 40 Ld 6x6 L40.6x6
ISL6261CRZ-T ISL6261CRZ -10 to +100 40 Ld 6x6 L40.6x6
ISL6261CR7Z ISL6261CR7Z -10 to +100 48 Ld 7x7 L48.7x7
ISL6261CR7Z-T ISL6261CR7Z -10 to +100 48 Ld 7x7 L48.7x7
ISL6261IRZ -40 to +100 40 Ld 6x6 L40.6x6
ISL6261IRZ-T ISL6261IRZ -40 to +100 40 Ld 6x6 L40.6x6
ISL6261IR7Z ISL6261IR7Z -40 to +100 48 Ld 7x7 L48.7x7
ISL6261IR7Z-T ISL6261IR7Z -40 to +100 48 Ld 7x7 L48.7x7
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. R3 Technology™ is a trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.