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ADP3422 Datasheet

  • ADP3422

  • IMVP-II-Compliant Core Power Controller for Mobile CPUs

  • 473.47KB

  • 17页

  • AD

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a
IMVP-II-Compliant
Core Power Controller for Mobile CPUs
ADP3422
FUNCTIONAL BLOCK DIAGRAM
VCC
FEATURES
Certified IMVP-II Controller
Excellent Transient Containment
Minimum Number of Output Capacitors
Fast, Smooth, Output Transition During VID Code Change
Current Limit with Hiccup Protection
Transient-Glitch-Free Power Good
Low Shutdown Current
Soft Start Eliminates In-Rush Current Surge
Adaptive Noise-Blanking Enhancement for Speed and
Stability
Highly Redundant Over-Voltage and Reverse-Voltage
Protection
Controls Synchronous Rectifier for Improved Battery Life
APPLICATIONS
IMVP-II Enabled Core DC/DC Converters
Fixed-Voltage Mobile CPU Core DC/DC Converters
Notebook/Laptop Power Supplies
Programmable Output Power Supplies
ADP3422
HYSSET
CPUSET
FSHIFT
DSHIFT
BSHIFT
HYSTERESIS
AND
SHIFT-SETTING
VR
CS+
CLIM
CS鈥?/div>
VID4
VID3
VID2
VID1
VID0
DACOUT
SWFB
VR
VCC
PROGRAMMED
DAC
AND
FIXED
REFERENCE
EN
CORE
REG
OUT
RAMP
GENERAL DESCRIPTION
The ADP3422 is a hysteretic dc-dc buck converter controller to
power a mobile processor鈥檚 core. The optimized low voltage
design is powered from the 3.3 V system supply. The output
voltage is set by a 5-bit VID code. To accommodate the transition
time required by the newest processors for on-the-fly VID
changes, the ADP3422 features high-speed operation to allow a
minimized inductor size that results in the fastest change of
current to the output. To further allow for the minimum number
of output capacitors to be used, the ADP3422 features active
voltage positioning that can be optimally compensated to ensure a
superior load transient response. The output signal interfaces
with the ADP3415 MOSFET driver that is optimized for high
speed and high efficiency for driving both the upper and lower
(synchronous) MOSFETs of the buck converter.
BOM
DSLP
DPRSLP
PWRGD
SD
UVLO AND MAIN BIAS
PWRGD BLANKER
OP MODE
SELECTOR
SR CONTROL
COREFB
PWRGD MONITOR
SS
DRVLSD
CLAMP
SS-HICCUP TIMER AND OCP
OVP AND RVP
POWER MANAGEMENT
GND
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 2001
BOMSEL
DSLPSEL

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