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| 型號(hào)： | ADM1185ARMZ-1REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | Quad Voltage Monitor and Sequencer |
| 中文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | ROHS COMPLIANT, MO-187BA, MSOP-10 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 270K |
| 代理商： | ADM1185ARMZ-1REEL7 |
Quad Voltage Monitor and Sequencer
ADM1185
FEATURES
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 registered trademarks are the 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
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
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
Open-drain power-good output (PWRGD)
10-lead MSOP
APPLICATIONS
Monitor and alarm functions
Power supply sequencing
Telecommunication and data communication equipment
PC/servers
FUNCTIONAL BLOCK DIAGRAM
VCC
VIN1
REF = 0.6V
OUT1
VIN2
REF = 0.6V
OUT2
VIN3
REF = 0.6V
OUT3
VIN4
REF = 0.6V
PWRGD
GND
POWER AND
REFERENCE
GENERATOR
REF = 0.6V
STATE
MACHINE
CORE
ADM1185
0
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.
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.
A digital core interprets the status of the comparator outputs.
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.
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.
The ADM1185 is available in a 10-lead mini small outline
package (MSOP).
APPLICATIONS DIAGRAM
2.5V OUT
1.8V OUT
1.2V OUT
3.3V IN
2.5V OUT
1.8V OUT
1.2V OUT
OUT1
VIN1
OUT2
VIN2
OUT3
VIN3
VIN4
GND
PWRGD
POWER
GOOD
VCC
ADM1185
GND
REGULATOR1
IN
EN
OUT
GND
REGULATOR2
IN
EN
OUT
GND
REGULATOR3
IN
EN
OUT
0
Figure 2.
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