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3+1 Voltage Regulator for IMVP-7/VR12™ CPUs
ISL95831
Compliant with IMVP-7/VR12™, the ISL95831 provides a
complete solution for microprocessor and graphic processor
core power supply. It provides two Voltage Regulators (VRs)
with three integrated gate drivers. The first VR can be
configured as 3-, 2- or 1-phase VR while the second output is 1-
phase VR, providing maximum flexibility. The two VRs share the
serial control bus to communicate with the CPU and achieve
lower cost and smaller board area compared with the two-chip
approach.
Based on Intersil’s Robust Ripple Regulator (R3) technology™,
the PWM modulator compared to traditional modulators, has
faster transient settling time, variable switching frequency
during load transients and has improved light load efficiency
with it’s ability to automatically change switching frequency.
The ISL95831 has several other key features. Both outputs
support DCR current sensing with single NTC thermistor for
DCR temperature compensation or accurate resistor current
sensing. Both outputs come with remote voltage sense,
programmable V
BOOT
voltage, programmable I
MAX
, T
MAX
,
adjustable switching frequency, OC protection and separate
Power-Good.
Features
•Serial Data Bus
•Dual Outputs:
- Configurable 3-, 2- or 1-phase for the 1st Output using 2
integrated Gate Drivers
- 1-phase for the 2nd Output using an Integrated Gate
Driver
• 0.5% System Accuracy Over-Temperature
• Supports Multiple Current Sensing Methods
- Lossless Inductor DCR Current Sensing
- Precision Resistor Current Sensing
• Differential Remote Voltage Sensing
•Programmable V
BOOT
Voltage at Start-up
• Resistor Programmable I
MAX
, T
MAX
for Both Outputs
• Adaptive Body Diode Conduction Time Reduction
Applications
• IMVP-7/VR12 Compliant Computers
Load Line Regulation
Ordering Information
PART NUMBER
(Notes 1, 2, 3) PART MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL95831HRTZ 95831 HRTZ -10 to +100 48 Ld 6x6 TQFN L48.6x6
ISL95831IRTZ 95831 IRTZ -40 to +100 48 Ld 6x6 TQFN L48.6x6
NOTES:
1. Add “-T*” suffix for tape and reel. 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 ISL95831
. For more information on MSL please see techbrief TB363.
0.80
0.81
0.82
0.83
0.84
0.85
0.86
0.87
0.88
0.89
0.90
0.91
30 36 42 48 54 60 66
I
OUT
(A)
V
OUT
(V)
0 6 12 18 24
V
IN
= 19V
V
IN
=
12V
V
IN
= 8V
January 21, 2011
FN7613.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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