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PDF ADP3194 Data sheet ( Hoja de datos )
| Número de pieza | ADP3194 | |
| Descripción | 6-Bit Synchronous Buck Controller | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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6-Bit, Programmable 2-/3-/4-Phase,
Synchronous Buck Controller
ADP3194
FEATURES
Selectable 2-, 3-, or 4-phase operation
Up to 1 MHz per phase
±9.5 mV worst-case differential sensing error
over temperature
Logic-level PWM outputs for interface to external
high power drivers
PWM Flex-ModeTM architecture for excellent load
transient performance
Active current balancing between all output phases
Built-in power good/crowbar blanking supports OTF VID
code changes
6-bit digitally programmable 0.8375 V to 1.6 V output
Programmable short circuit protection with programmable
latch-off delay
APPLICATIONS
Desktop PC power supplies for
Next-generation Intel® processors
VRM modules
Games consoles
FUNCTIONAL BLOCK DIAGRAM
VCC
28
SHUNT
REGULATOR
EN 11
UVLO
SHUTDOWN
AND BIAS
GND 19
DAC + 150mV
CSREF
RAMPADJ RT
14 13
ADP3194
OSCILLATOR
CMP
SET
RESET
EN
27 PWM1
CURREN T-
BALANCING
CIRCUIT
CMP
CMP
RESET
2-/3-/4-PHASE
DRIVER LOGIC
RESET
26 PWM2
25 PWM3
DAC – 250mV
CMP RESET
24 PWM4
PWRGD 10
DELAY
CROWBAR
CURRENT
LIMIT
ILIMIT 15
EN
DELAY 12
SOFT
START
CURREN T-
LIMIT
CIRCUIT
23 SW1
22 SW2
21 SW3
20 SW4
17 CSSUM
16 CSREF
18 CSCOMP
COMP 9
8 FB
GENERAL DESCRIPTION
The ADP31941 is a highly efficient, multiphase, synchronous
buck switching regulator controller optimized for converting a
5 V or 12 V main supply into the core supply voltage required
by high performance Intel processors. It uses an internal 6-bit
DAC to read a voltage identification (VID) code directly from
the processor that is used to set the output voltage between
0.8375 V and 1.6 V. The device uses a multimode PWM archi-
tecture to drive the logic-level outputs at a programmable
switching frequency that can be optimized for VR size and
efficiency. The phase relationship of the output signals can be
programmed to provide 2-, 3-, or 4-phase operation, allowing
for the construction of up to four complementary buck switch-
ing stages.
PRECISION
REFERENCE
VID
DAC
7
FBRTN
1 23456
VID4 VID3 VID2 VID1 VID0 VID5
Figure 1. Functional Block Diagram
The ADP3194 also includes programmable, no-load offset,
and slope functions to adjust the output voltage as a function
of the load current, so it is always optimally positioned for a
system transient. The ADP3194 also provides accurate and
reliable short-circuit protection, adjustable current limiting,
and a delayed power good output that accommodates on-the-
fly (OTF) output voltage changes requested by the CPU.
The devices are specified over the commercial temperature
range of 0°C to +85°C and are available in a 28-lead TSSOP.
1 Protected by U. S. Patent Number 6,683,441; other patents pending.
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
1 page  
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ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
VCC
VID4 to VID0, VID5
FBRTN
SW1 to SW4
All Other Inputs and Outputs
Storage Temperature Range
Operating Ambient Temperature Range
Operating Junction Temperature
Thermal Impedance (θJA)
Lead Temperature
Soldering (10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
Rating
–0.3 V to +6 V
–0.3 V to +6 V
–0.3 V to +0.3 V
−5 V to +25 V
–0.3 V to VCC + 0.3 V
–65°C to +150°C
0°C to +85°C
125°C
100°C/W
300°C
215°C
220°C
ADP3194
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Absolute maximum ratings apply individually only, not in
combination. Unless otherwise specified, all other voltages
are referenced to GND.
ESD CAUTION
Rev. 0 | Page 5 of 32
5 Page 
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Table 4. VID Codes for the ADP3194
VID4 VID3 VID2 VID1 VID0
11111
11111
01010
01001
01001
01000
01000
00111
00111
00110
00110
00101
00101
00100
00100
00011
00011
00010
00010
00001
00001
00000
00000
11110
11110
11101
11101
11100
11100
11011
11011
11010
VID5
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Output
No CPU
No CPU
0.8375 V
0.8500 V
0.8625 V
0.8750 V
0.8875 V
0.9000 V
0.9125 V
0.9250 V
0.9375 V
0.9500 V
0.9625 V
0.9750 V
0.9875 V
1.0000 V
1.0125 V
1.0250 V
1.0375 V
1.0500 V
1.0625 V
1.0750 V
1.0875 V
1.1000 V
1.1125 V
1.1250 V
1.1375 V
1.1500 V
1.1625 V
1.1750 V
1.1875 V
1.2000 V
ADP3194
VID4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
VID3
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
VID2
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
VID1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
VID0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
VID5
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Output
1.2125 V
1.2250 V
1.2375 V
1.2500 V
1.2625 V
1.2750 V
1.2875 V
1.3000 V
1.3125 V
1.3250 V
1.3375 V
1.3500 V
1.3625 V
1.3750 V
1.3875 V
1.4000 V
1.4125 V
1.4250 V
1.4375 V
1.4500 V
1.4625 V
1.4750 V
1.4875 V
1.5000 V
1.5125 V
1.5250 V
1.5375 V
1.5500 V
1.5625 V
1.5750 V
1.5875 V
1.6000 V
Rev. 0 | Page 11 of 32
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADP3194.PDF ] | |
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