DATA SHORT
To request the full datasheet, please visit
www.intersil.com/products/isl95831
ISL95831
3+1 Voltage Regulator for IMVP-7/VR12™ CPUs
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.
FN7613
Rev 1.00
December 22, 2011
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
0.91
0.90
0.89
0.88
V
OUT
(V)
0.87
0.86
0.85
0.84
0.83
0.82
0.81
0.80
0
6
V
IN
= 19V
V
IN
= 12V
V
IN
= 8V
12
18
24
30 36
I
OUT
(A)
42
48
54
60
66
FIGURE 1. LOAD LINE REGULATION
FN7613 Rev 1.00
December 22, 2011
Page 1 of 2
ISL95831
© Copyright Intersil Americas LLC 2011. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see
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Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at
www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see
www.intersil.com
FN7613 Rev 1.00
December 22, 2011
Page 2 of 2
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