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ADM1052

更新时间： 2024-11-18 22:47:35
品牌 Logo 应用领域
亚德诺 - ADI 稳压器控制器
页数 文件大小 规格书
8页 163K
描述
Precision Dual Voltage Regulator Controller

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ADM1052 数据手册

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Precision Dual Voltage  
Regulator Controller  
a
ADM1052  
GENERAL DESCRIPTION  
FEATURES  
The ADM1052 is a dual, precision, voltage regulator controller  
intended for power rail generation and active bus termination  
on personal computer motherboards. It contains a precision  
1.2 V bandgap reference and two channels consisting of con-  
trol amplifiers driving external power devices. Each channel has a  
shutdown input to turn off amplifier output and “Hiccup Mode”  
protection circuitry for the external power device.  
Two Independent Controllers on One Chip  
Two 2.525 V Outputs  
Shutdown Inputs to Control Each Channel  
ꢀ2.5% Accuracy Over Line, Load, and Temperature  
Low Quiescent Current  
Low Shutdown Current  
Works with External N-Channel MOSFETs for Low Cost  
“Hiccup Mode” Fault Protection  
No External Voltage or Current Setting Resistors  
Small, 8-Lead SO Package  
The ADM1052 operates from a 12 V supply. This gives suffi-  
cient headroom for the amplifiers to drive external N-channel  
MOSFETs, operating as source-followers, as the external series  
pass devices. This has the advantage that N-channel devices are  
cheaper than P-channel devices of similar performance, and the  
circuit is easier to stabilize than one using P-channel devices in  
a common-source configuration.  
APPLICATIONS  
Desktop Computers  
Servers  
Workstations  
FUNCTIONAL BLOCK DIAGRAM  
3.3V  
V
CC  
CONTROL  
AMPLIFIER  
100ꢁF  
ADM1052  
BANDGAP  
REFERENCE  
FORCE 1  
SENSE 1  
V
CC  
V
OUT1  
50ꢁA  
2 ꢂ 100ꢁF  
SHUTDOWN  
CONTROL  
SHDN1  
HICCUP  
COMPARATOR  
3.3V  
CONTROL  
AMPLIFIER  
100ꢁF  
FORCE 2  
SENSE 2  
V
CC  
V
OUT2  
2 ꢂ 100ꢁF  
50ꢁA  
SHUTDOWN  
CONTROL  
SHDN2  
HICCUP  
COMPARATOR  
V
CC  
POWER-ON  
RESET  
CLK/DELAY  
GENERATOR  
CLOCK  
OSCILLATOR  
GND  
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  
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., 2001  
12345678

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