ADM1051A

更新时间： 2024-11-18 22:47:35

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
10页	177K
描述
Precision Dual Voltage Regulator Controllers

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ADM1051A 数据手册

Precision Dual Voltage

Regulator Controllers

ADM1051/ADM1051A

GENERAL DESCRIPTION

FEATURES

The ADM1051/ADM1051A are dual, precision, voltage regula-

tor controllers intended for power rail generation and active bus

termination on personal computer motherboards. They contain a

precision 1.2 V bandgap reference and two channels consisting of

control 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

shutdown input on the 1.5 V channel can also be used with the

TYPEDET signal on a PC motherboard to select the output voltage.

Two Independent Controllers on One Chip

1.515 V and 1.818 V Outputs

Shutdown Inputs to Control Each Channel

Compatible with PC Motherboard TYPEDET Signal

؎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

1.8 V/3.3 V ICH Sequenced Power-Up on ADM1051A

Small, 8-Lead SOIC Package

The ADM1051/ADM1051A operate from a 12 V supply, which

gives sufficient 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

CONTROL

AMPLIFIER

100␮F

ADM1051/ADM1051A

BANDGAP

FORCE 1

SENSE 1

REFERENCE

OUT1

100␮F

50␮A

SHUTDOWN

CONTROL

SHDN1

HICCUP

COMPARATOR

3.3V

CONTROL

AMPLIFIER

100␮F

FORCE 2

SENSE 2

NO CONNECTION

ON ADM1051A

OUT2

100␮F

50␮A

SHUTDOWN

CONTROL

SHDN2

HICCUP

COMPARATOR

POWER-ON

RESET

CLK/DELAY

GENERATOR

CLOCK

OSCILLATOR

GND

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

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与ADM1051A相关器件

型号	品牌	获取价格	描述	数据表
ADM1051A_15	ADI	获取价格	Precision Dual Voltage Regulator Controllers
ADM1051AJR	ADI	获取价格	Precision Dual Voltage Regulator Controllers
ADM1051AJR-REEL	ROCHESTER	获取价格	DUAL SWITCHING CONTROLLER, PDSO8, SOIC-8
ADM1051AJR-REEL	ADI	获取价格	IC DUAL SWITCHING CONTROLLER, PDSO8, SOIC-8, Switching Regulator or Controller
ADM1051AJR-REEL7	ADI	获取价格	IC DUAL SWITCHING CONTROLLER, PDSO8, SOIC-8, Switching Regulator or Controller
ADM1051AJRZ	ADI	获取价格	IC DUAL SWITCHING CONTROLLER, PDSO8, SOIC-8, Switching Regulator or Controller
ADM1051AJRZ-REEL	ADI	获取价格	暂无描述
ADM1051AJRZ-REEL7	ADI	获取价格	IC DUAL SWITCHING CONTROLLER, PDSO8, SOIC-8, Switching Regulator or Controller
ADM1051AJRZ-REEL7	ROCHESTER	获取价格	DUAL SWITCHING CONTROLLER, PDSO8, SOIC-8
ADM1051JR	ADI	获取价格	Precision Dual Voltage Regulator Controllers

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