Datasheet > ADM1185_07

ADM1185_07

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	320K
描述
Quad Voltage Monitor and Sequencer

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ADM1185_07 数据手册

Quad Voltage Monitor and Sequencer

ADM1185

FEATURES

FUNCTIONAL BLOCK DIAGRAM

VCC

Powered from 2.7 V to 5.5 V on the VCC pin

Monitors 4 supplies via 0.8% accurate comparators

Logical core with internal timeouts provides power supply

sequencing and fault protection

4 inputs can be programmed to monitor different voltage

levels with resistor dividers

3 open-drain enable outputs

POWER AND

REF = 0.6V

REFERENCE

GENERATOR

ADM1185

REF = 0.6V

OUT1

VIN1

VIN2

VIN3

VIN4

OUT2

Open-drain power-good output (PWRGD)

10-lead MSOP

STATE

MACHINE

CORE

OUT3

APPLICATIONS

Monitor and alarm functions

Power supply sequencing

Telecommunication and data communication equipment

PC/servers

PWRGD

GND

Figure 1.

GENERAL DESCRIPTION

The ADM1185 is an integrated, four-channel, voltage

monitoring and sequencing device. A 2.7 V to 5.5 V power

supply is required on the VCC pin to power the device.

Internal time delays can be used for sequencing the startup of

subsequent power supplies enabled by the outputs. Supplies

falling out of range are also detected and, as a result, appropriate

outputs are disabled.

Four precision comparators monitor four voltage rails.

All comparators have a 0.6 V reference with a worst-case

accuracy of 0.8%. Resistor networks that are external to the

VIN1, VIN2, VIN3, and VIN4 pins set the trip points for

the monitored supply rails.

The ADM1185 has four open-drain outputs. In a typical

configuration, OUT1 to OUT3 are used to enable power

supplies, while PWRGD is a common power-good output

indicating the status of all monitored supplies.

A digital core interprets the status of the comparator outputs.

The ADM1185 is available in a 10-lead mini small outline

package (MSOP).

APPLICATIONS DIAGRAM

3.3V IN

2.5V OUT

1.8V OUT

1.2V OUT

VCC

ADM1185

REGULATOR1

2.5V OUT

VIN1

OUT1

OUT2

OUT3

OUT

GND

VIN2

VIN3

REGULATOR2

1.8V OUT

1.2V OUT

OUT

GND

VIN4

GND

PWRGD

REGULATOR3

OUT

GND

POWER

GOOD

Figure 2.

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 that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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