ISL95831
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3+1 Voltage Regulator for IMVP-7/VR12 CPUs
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Datasheet
ISL95831
3+1 Voltage Regulator for IMVP-7/VR12 CPUs
V
IN
(min) (V)
4.5
V
IN
(max) (V)
25
V
OUT
(min) (V)
.25
V
OUT
(max) (V)
1.52
I
OUT
(max) (A)
90
V
BIAS
(V)
5
Applications VR12/IMVP7
Max # of outputs 1
Max # of phases 3
Droop Y
Integrated MOSFET Driver Y
Product Information
Key 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
Description
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 VBOOT voltage, programmable I
MAX
, T
MAX
, adjustable switching frequency, OC protection and separate
Power-Good.
Pa
e 1 of 2ISL95831 3+1 Volta
e Re
ulator for IMVP-7/VR12 CPUs
11/8/2011htt
://www.intersil.com/
roducts/
rint.as
?id=ISL95831
