DATASHEET
ISL6263D
FN6753
Rev 1.00
July 8, 2010
3-Bit VID Single-Phase Voltage Regulator with Current Monitor for GPU Core
Power
The ISL6263D IC is a Single-Phase Synchronous Buck PWM
Features
voltage regulator for GPU core power applications. It features
• Precision Single-Phase Core Voltage Regulator
- 0.5% System Accuracy 0°C to +100°C
3
Intersil’s Robust Ripple Regulator (R ) Technology™.
Integrated current monitor, differential remote sense amplifier,
MOSFET driver and bootstrap diode result in smaller
implementation area and lower component cost.
- Differential Remote GPU Die Voltage Sensing
• Real-Time GPU Current Monitor Output
• Applications up to 25A
3
Intersil’s R 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 ISL6263D 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.
• Input Voltage Range: +5.0V to +25.0V
• Programmable PWM Frequency: 200kHz to 500kHz
• Pre-biased Output Start-Up Capability
• 3-bit Voltage Identification (VID)
• Two Voltage Offset Pins
• 0.7V to 1.0875V Output Voltage Range
• Configurable PWM Modes
- Forced Continuous Conduction Mode
- Automatic Entry and Exit of Diode Emulation Mode
- Selectable Audible Frequency PWM Filter
The GPU core voltage can be dynamically programmed from
0.7V to 1.0875V by the three VID input pins without requiring
sequential stepping of the VID states. The ISL6263D
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.
• Integrated MOSFET Drivers and Bootstrap Diode
• Choice of Current Sensing Schemes
- Lossless Inductor DCR Current Sensing
- Precision Resistive Current Sensing
• Overvoltage, Undervoltage and Overcurrent Protection
• Pb-Free (RoHS compliant)
Ordering Information
TEMP
PART NUMBER
(Notes 2, 3)
PART
MARKING
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
Pinout
ISL6263D
(32 LD 5x5 QFN)
ISL6263DHRZ ISL6263 DHRZ -10 to +100 32 Ld 5x5 QFN L32.5x5
TOP VIEW
ISL6263DHRZ-T ISL6263 DHRZ -10 to +100 32 Ld 5x5 QFN L32.5x5
(Note 1)
NOTES:
32 31
30 29 28 27
26 25
1. Please refer to TB347 for details on reel specifications.
RBIAS
SOFT
OCSET
VW
1
2
3
4
5
6
7
8
24 OFFSET1
OFFSET0
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.
23
22 PVCC
21 LGATE
20 PGND
THERMAL PAD
(BOTTOM)
COMP
FB
3. ForMoisture Sensitivity Level (MSL), please see device information
page for ISL6263D. For more information on MSL please see
techbrief TB363.
19
PHASE
VDIFF
VSEN
18 UGATE
17 BOOT
9
10
11 12 13 14
15 16
FN6753 Rev 1.00
July 8, 2010
Page 1 of 18
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