1
FN6745.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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| Intersil (and design) is a trademark of Intersil Americas LLC
Copyright Intersil Americas Inc. 2008, 2010. All Rights Reserved. R
3
Technology™ is a trademark of Intersil Americas LLC
All other trademarks mentioned are the property of their respective owners.
ISL6263C
5-Bit VID Single-Phase Voltage Regulator
with Current Monitor for GPU Core Power
The ISL6263C IC is a Single-Phase Synchronous-Buck
PWM voltage regulator for GPU core power application. It
features Intersil’s Robust Ripple Regulator (R
3
)
Technology™. Integrated current monitor, differential remote
sense amplifier, MOSFET driver and bootstrap diode result
in smaller implementation area and lower component cost.
Intersil’s R
3
Technology™ combines the best features of
both fixed-frequency PWM and hysteretic PWM, delivering
excellent light-load efficiency and superior load transient
response by commanding variable switching frequency
during the transitory event. For maximum conversion
efficiency, the ISL6263C automatically enters diode
emulation mode (DEM) when the inductor current attempts
to flow negative. DEM is highly configurable and easy to
set-up. A PWM filter can be enabled, which prevents the
switching frequency from entering the audible spectrum as a
result of extremely light load while in DEM.
The GPU core voltage can be dynamically programmed from
0.41200V to 1.28750V by the five VID input pins without
requiring sequential stepping of the VID states. The
ISL6263C requires only one capacitor for both the soft-start
slew-rate and the dynamic VID slew-rate by internally
connecting the SOFT pin to the appropriate current source.
The voltage Kelvin sensing is accomplished with an
integrated unity-gain true differential amplifier.
Features
• Precise Single-Phase Core Voltage Regulator
- 0.5% System Accuracy 0°C to +100°C
- Differential Remote GPU Die Voltage Sense
• Real-Time GPU Current Monitor Output
• Applications up to 25A
• Input Voltage Range: +5.0V to +25.0V
• Programmable PWM Frequency: 200kHz to 500kHz
• Pre-Biased Output Start-Up Capability
• 5-Bit Voltage Identification Input (VID)
- 0.41200V to 1.28750V
-25.75mV Steps
- Sequential or Non-Sequential VID Change On-the-Fly
• Configurable PWM Modes
- Forced Continuous Conduction Mode
- Automatic Entry and Exit of Diode Emulation Mode
- Selectable Audible Frequency PWM Filter
• Integrated MOSFET Drivers and Bootstrap Diode
• Choice of Current Sense Schemes
- Lossless Inductor DCR Current Sense
- Precise Resistive Current Sense
• Overvoltage, Undervoltage and Overcurrent Protection
• Pb-Free (RoHS Compliant)
Pinout
ISL6263C
(32 LD 5x5 QFN)
TOP VIEW
Ordering Information
PART NUMBER
(Notes 2, 3)
PART
MARKING
TEMP
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL6263CHRZ ISL6263 CHRZ -10 to +100 32 Ld 5x5 QFN L32.5x5
ISL6263CHRZ-T
(Note 1)
ISL6263 CHRZ -10 to +100 32 Ld 5x5 QFN L32.5x5
NOTES:
1. Please refer to TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-
free material sets, molding compounds/die attach materials, and 100%
matte tin plate plus anneal (e3 termination finish, which is 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.
3. For Moisture Sensitivity Level (MSL), please see device information
page for ISL6263C
. For more information on MSL please see techbrief
TB363
.
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24
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21
20
19
18
17
32 31 30 29 28 27 26 25
910111213141516
THERMAL PAD
(BOTTOM)
RBIAS
VSEN
VDIFF
FB
COMP
VW
OCSET
SOFT
VID1
VID0
PVCC
LGATE
PGND
PHASE
UGATE
BOOT
RTN
VID2
VID3
VID4
IMON
VR_ON
FDE
PGOOD
AF_EN
VDD
VSS
VIN
ISP
VO
ISN
ICOMP
Data Sheet July 8, 2010
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