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ADM1052 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADM1052 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 8 page 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. a ADM1052 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001 Precision Dual Voltage Regulator Controller FEATURES 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 APPLICATIONS Desktop Computers Servers Workstations GENERAL DESCRIPTION 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. 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. FUNCTIONAL BLOCK DIAGRAM SHDN1 VCC BANDGAP REFERENCE SHUTDOWN CONTROL HICCUP COMPARATOR 100 F 2 100 F 3.3V VOUT1 CONTROL AMPLIFIER FORCE 1 SENSE 1 VCC 50 A ADM1052 3.3V VOUT2 FORCE 2 SENSE 2 SHDN2 VCC SHUTDOWN CONTROL HICCUP COMPARATOR CONTROL AMPLIFIER 50 A GND CLOCK OSCILLATOR POWER-ON RESET CLK/DELAY GENERATOR VCC 100 F 2 100 F |
Số phần tương tự - ADM1052_15 |
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Mô tả tương tự - ADM1052_15 |
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