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ADP3153

更新时间： 2024-11-28 22:39:03
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
12页 167K
描述
5-Bit Programmable Dual Power Supply Controller for Pentium II Processor

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ADP3153 数据手册

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5-Bit Programmable Dual  
Power Supply Controller  
for Pentium® II Processor  
a
ADP3153  
FEATURES  
GENERAL DESCRIPTION  
5-Bit Digitally Programmable 1.8 V to 3.5 V Output  
Voltage  
Dual N-Channel Synchronous Driver  
Total Output Accuracy ؎1% (0؇C to +70؇C)  
High Efficiency  
Current-Mode Operation  
Short Circuit Protection  
Power Good Output  
The ADP3153 is a highly efficient synchronous switching regu-  
lator controller and a linear regulator controller. The switching  
regulator controller is optimized for Pentium II and Deschutes  
Processor applications where 5 V is stepped down to a digitally  
controlled output voltage between 1.8 V and 3.5 V. Using a 5-bit  
DAC to read a voltage identification (VID) code directly from  
the processor, the ADP3153 uses a current mode constant off-  
time architecture to generate its precise output voltage.  
Overvoltage Protection Crowbar  
On-Board Linear Regulator Controller  
VRM 8.2 Compatible  
The ADP3153 drives two N-channel MOSFETS in a synchro-  
nous rectified buck converter, at a maximum switching fre-  
quency of 250 kHz. Using the recommended loop compensation  
and guidelines, the ADP3153 provides a dc/dc converter that  
meets Intel’s stringent transient specifications with a minimum  
number of output capacitors and smallest footprint. Addition-  
ally, the current mode architecture also provides guaranteed  
short circuit protection and adjustable current limiting.  
Narrow Body TSSOP 20-Lead Package  
APPLICATIONS  
Desktop PC Power Supply for:  
Pentium II Processor  
Deschutes Processor  
Pentium Pro Processor  
Pentium Processor  
AMD–K6 Processor  
VRM Modules  
The ADP3153’s linear regulator controller drives an external  
N-channel device. The output voltage is set by the ratio of the  
external feedback resistors. The controller has been designed for  
excellent load transient response.  
V
V
CC  
IN  
+12V  
+5V  
+
C
22␮F  
1␮F  
IN  
R1  
V
CC  
SD  
DRIVE1  
L
R
7m⍀  
V
+5V  
CMP  
SENSE  
IN  
IRL3103  
1nF  
2.5␮H  
V
O
R2  
C
ADP3153  
COMP  
1.8V–3.5V  
14A  
SENSE+  
+
C
O
IRL2703  
VLDO  
V
O2  
SENSE–  
DRIVE2  
PGND  
+3.3V  
1A  
35k⍀  
20k⍀  
1000␮F  
10BQ015  
FB  
IRL3103  
C
T
150pF  
AGND  
VID0–VID4  
5-BIT CODE  
Figure 1. Typical Application  
Pentium is a registered trademark of Intel Corporation.  
All other trademarks are the property of their respective holders.  
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  
which 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  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1998  
1234567...12

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