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參數(shù)資料
| 型號(hào)： | ADP3158 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 4-Bit Programmable Synchronous Buck Controllers |
| 中文描述： | 4位可編程同步降壓控制器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 190K |
| 代理商： | ADP3158 |
REV. A
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.
a
ADP3158/ADP3178
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
Analog Devices, Inc., 2001
4-Bit Programmable
Synchronous Buck Controllers
FUNCT IONAL BLOCK DIAGRAM
g
m
CMP
+
–
DRVH
LRDRV2
LRFB2
LRFB1
LRDRV1
COMP
DRVL
GND
CS–
CS+
PWM
DRIVE
VCC
CT
OSCILLATOR
UVLO
& BIAS
REFERENCE
REF
V
LR1
V
LR2
REF
VID DAC
DAC+20%
ADP3158/ADP3178
VID3
VID2
VID1
VID0
FEATURES
Optimally Compensated Active Voltage Positioning
with Gain and Offset Adjustment (ADOPT) for
Superior Load Transient Response
Complies with VRM Specifications with Lowest
System Cost
4-Bit Digitally Programmable 1.3 V to 2.05 V Output
N-Channel Synchronous Buck Driver
Total Accuracy 0.8% Over Temperature
Two On-Board Linear Regulator Controllers Designed
to Meet System Power Sequencing Requirements
High Efficiency Current-Mode Operation
Short Circuit Protection for Switching Regulator
Overvoltage Protection Crowbar Protects Micro-
processors with No Additional External Components
APPLICATIONS
Core Supply Voltage Generation for:
Intel Pentium
III
Intel Celeron
GE NE RAL DE SCRIPT ION
T he ADP3158 and ADP3178 are highly efficient synchronous
buck switching regulator controllers optimized for converting a
5 V main supply into the core supply voltage required by high-
performance processors. T hese devices use an internal 4-bit DAC
to read a voltage identification (VID) code directly from the
processor, which is used to set the output voltage between 1.3 V
and 2.05 V. T hey use a current mode, constant off-time archi-
tecture to drive two N-channel MOSFET s at a programmable
switching frequency that can be optimized for regulator size and
efficiency.
T he ADP3158 and ADP3178 also use a unique supplemental
regulation technique called Analog Devices Optimal Positioning
T echnology (ADOPT ) to enhance load transient performance.
Active voltage positioning results in a dc/dc converter that
meets the stringent output voltage specifications for high-
performance processors, with the minimum number of output
capacitors and smallest footprint. Unlike voltage-mode and
standard current-mode architectures, active voltage positioning
adjusts the output voltage as a function of the load current so it
is always optimally positioned for a system transient. T hey also
provide accurate and reliable short circuit protection and
adjustable current limiting. T he devices include an integrated
overvoltage crowbar function to protect the microprocessor
from destruction in case the core supply exceeds the nominal
programmed voltage by more than 20%.
T he ADP3158 and ADP3178 contain two linear regulator
controllers that are designed to drive external N-channel
MOSFET s. T he outputs are internally fixed at 2.5 V and 1.8 V
in the ADP3158, while the ADP3178 provides adjustable out-
puts that are set using an external resistor divider. T hese
linear regulators are used to generate the auxiliary voltages
(AGP, GT L , etc.) required in most motherboard designs,
and have been designed to provide a high bandwidth load-
transient response.
T he ADP3158 and ADP3178 are specified over the commercial
temperature range of 0
°
C to 70
°
C and are available in a 16-lead
SOIC package.
ADOPT is a trademark of Analog Devices, Inc.
Pentium is a registered trademark of Intel Corporation.
Celeron is a trademark of Intel Corporation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADP3158JR | 4-Bit Programmable Synchronous Buck Controllers |
| ADP3178 | 4-Bit Programmable Synchronous Buck Controllers |
| ADP3178JR | 4-Bit Programmable Synchronous Buck Controllers |
| ADP3164 | 5-Bit Programmable 4-Phase Synchronous Buck Controller |
| ADP3164JRU | 5-Bit Programmable 4-Phase Synchronous Buck Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADP3158JR | 制造商:Rochester Electronics LLC 功能描述:3-BIT PROGRAMMBLE SYNCRO. BUCK CNTRLR. - Bulk |
| ADP3158JR-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| ADP3159 | 制造商:AD 制造商全稱:Analog Devices 功能描述:4-Bit Programmable Synchronous Buck Controllers |
| ADP3159JRU | 制造商:AD 制造商全稱:Analog Devices 功能描述:4-Bit Programmable Synchronous Buck Controllers |
| ADP3159JRU-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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