ADP3207 ANALOG DEVICES, ADP3207 Datasheet
ADP3207
Manufacturer Part Number
ADP3207
Description
7-Bit Programmable Multiphase Mobile CPU Synchronous Buck Controller
Manufacturer
ANALOG DEVICES
Datasheet
1.ADP3207.pdf
(32 pages)
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FEATURES
1-, 2-, or 3-phase operation at up to 750 kHz per phase
±8 mV worst-case differential sensing error over
Interleaved PWM outputs for driving external high power
Automatic power-saving modes maximize efficiency during
Soft transient control reduces inrush current and audio noise
Active current balancing between output phases
Independent current limit and load line setting inputs for
Built-in power-good masking supports VID on-the-fly
7-bit digitally programmable 0.3 V to 1.5 V output
Overload and short-circuit protection with programmable
Built-in clock enable output delays CPU clock until CPU
APPLICATIONS
Notebook power supplies for next generation Intel®
GENERAL DESCRIPTION
The ADP3207
buck-switching regulator controller optimized for converting
notebook battery voltage into the core supply voltage required
by high performance Intel processors. The part uses an internal
7-bit DAC to read voltage identification (VID) code directly
from the processor that sets the output voltage. The phase
relationship of the output signals can be programmed to
provide 1-, 2-, or 3-phase operation, allowing for the
construction of up to three interleaved buck-switching stages.
The ADP3207 uses a multimode architecture to drive the logic-
level PWM outputs at a programmable switching frequency that
can be optimized depending on the output current requirement.
The part switches between multiphase and single-phase operation
to maximize its effectiveness under all load conditions. In addition,
the ADP3207 includes a programmable slope function to adjust
the output voltage as a function of the load current. As a result,
it is always best positioned for a system transient.
1
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Patent 6,683,441.
temperature
MOSFET drivers
light load and deeper sleep operation
additional design flexibility
latch-off delay
supply voltage stabilizes
processors
1
is a high efficiency, multiphase, synchronous,
7-Bit Programmable Multiphase Mobile
CPU Synchronous Buck Controller
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The chip also provides accurate and reliable short-circuit
protection, adjustable current limiting, and a delayed power-
good output that accommodates on-the-fly output voltage
changes requested by the CPU.
The ADP3207 is specified over the extended commercial
temperature range of 0°C to 100°C and is available in a 40-lead
LFCSP package.
PGDELAY
TTSENSE
PWRGD
CLKEN
COMP
ILIMIT
VRTT
GND
EN
20
30
29
11
1
3
2
4
7
DAC + 200mV
DAC – 300mV
CSREF
REFERENCE
PRECISION
SHUTDOWN
THROTTLING
FUNCTIONAL BLOCK DIAGRAM
AND BIAS
THERMAL
CONTROL
5
UVLO
CSREF
VCC
31
DELAY
1.7V
34
35
VRPM
START
SOFT
12
36
–
+
+
+
–
–
©2006 Analog Devices, Inc. All rights reserved.
37
RRPM
DAC
VID
OSCILLATOR
13
BALANCING
38
CURRENT
CIRCUIT
Figure 1.
39
RT
14
40
CURRENT
RAMPADJ
CIRCUIT
+
–
LIMIT
15
CURRENT LIMIT
CROWBAR
+
CMP
–
+
CMP
–
+
CMP
–
+
–
www.DataSheet4U.com
ADP3207
ADP3207
1/2/3 – PHASE
RESET
RESET
RESET
SOFT START/
CONTROL
SET
DRIVER
DEEPER
LOGIC
SLEEP
BOOT/
www.analog.com
–
+
EN
26
25
24
23
22
21
19
18
17
16
33
32
10
28
27
6
9
8
PWM1
PWM2
PWM3
SW1
SW2
SW3
CSCOMP
CSSUM
CSREF
LLSET
DPRSTP
DPRSLP
STSET
DCM
PSI
OD
FB
SS
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