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ADP3203 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADP3203
Description  2-Phase IMVP-II & IMVP-III Core Controller for Mobile CPUs
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADP3203 Datasheet(HTML) 1 Page - Analog Devices

 
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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
©ANALOG DEVICES, INC., 2002
REV. PrD 1/02
a
2-Phase IMVP-II & IMVP-III
Core Controller for Mobile CPUs
Preliminary Technical Data
ADP3203
FEATURES
Pin Selectable 1 or 2-Phase Operation
Backward Compatible to IMVP-II
Excellent Static and Dynamic Current Sharing
Superior Load Transient Response with ADOPT
TM
Optimal Positioning Technology
Noise-Blanking for Speed and Stability
Synchronous Rectifier Control for Extended Battery
Life
Cycle-by-Cycle Current Limiting
Hiccup or Latched Overload Protection
Transient-Glitch-Free Power Good
Soft Start Eliminates Power-On In-Rush Current Surge
Two-Level Over-Voltage and Reverse-Voltage
Protection
APPLICATIONS
IMVP II-III Core DC/DC Converters
Fixed Voltage Mobile CPU Core DC/DC Converters
Notebook/Laptop Power Supplies
Programmable Output Power Supplies
GENERAL DESCRIPTION
The ADP3203 is a 1 or 2-phase hysteretic peak current
DC-DC buck converter controller dedicated to power a
mobile processor's core. The optimized low voltage design is
powered from the 3.3 V system supply and draws only
10 µA maximum in shutdown. The nominal 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 ADP3203 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
ADP3203 features active voltage positioning with ADOPT
TM
optimal compensation 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 top and bottom MOSFETs of
the buck converter. The ADP3203 is capable of controlling
the synchronous rectifier to extend battery lifetime in light
load conditions.
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FUNCTIONAL BLOCK DIAGRAM
VID0
VID1
VID2
VID3
VID4
DACOUT
GND
VCC
CS+
CS-
REG
ADP3203
CLIM
CORE
SS
19
COREFB
PWRGD
16
SD
7
BOM
DSLP
DPRSLP
HYSSET
BSHIFT
DSHIFT
HYSTERESIS
SETTING
&
SHIFT-MUX
3
1
25
26
CLAMP
SR CONTROL
COREGD MONITOR
SS-HICCUP TIMER & OCP
OVP & RVP
ENABLE _UVLO MAIN BIAS
PWRGD BLANKER
VID MUX &
SHIFT
SELECTOR
15
11
13
14
2
22
PM MODULE
12
28
27
VR
8
EN
RAMP
24
VR
23
DRVLSD
PHASE
SPLITER
OUT2
OUT1
CURRENT
SENSE
MUX
CS1
CS2
18
21
20
17
10
9
6
5-BIT VID
DAC
&
FIXED
REF
5
4
PRELIMINARY TECHNICAL DATA


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