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参数资料
| 型号： | EVAL-ADM1186-2MBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | KIT MICRO EVALUATION ADM1186-2 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电源监控器/跟踪器/序列发生器 |
| 已用 IC / 零件： | ADM1186-2 |
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Quad Voltage Up and Down Sequencer
and Monitor with Programmable Timing
Data Sheet
FEATURES
Powered from 2.7 V to 5.5 V on the VCC pin
Monitors four supplies via 0.8% accurate comparators
Digital core supports up and down supply sequencing
Multiple devices can be cascaded (ADM1186-1)
Four inputs can be programmed to monitor different voltage
levels with resistor dividers
Capacitor programmable supply sequence time delays
and a timeout delay to 5% accuracy at 25°C
Four open-drain enable outputs
Open-drain power-good output
Open-drain sequence complete pin and bidirectional
open-drain fault pin (ADM1186-1 only)
APPLICATIONS
Monitor and alarm functions
Up and down power supply sequencing
Telecommunication and data communication equipment
PCs, servers, and notebook PCs
GENERAL DESCRIPTION
The ADM1186-1 and ADM1186-2 are integrated, four-channel
voltage monitoring and sequencing devices. A 2.7 V to 5.5 V
power supply is required on the VCC pin for power.
Four precision comparators, VIN1 to VIN4, monitor four
voltage rails. All four comparators share a 0.6 V reference and
have a worst-case accuracy of 0.8%. Resistor networks that are
external to the VIN1, VIN2, VIN3, and VIN4 pins set the
undervoltage (UV) trip points for the monitored supply rails.
The ADM1186-1 and ADM1186-2 have four open-drain enable
outputs, OUT1 to OUT4, that are used to enable power supplies.
An open-drain power-good output, PWRGD, indicates whether
the four VINx inputs are above their UV thresholds.
A state machine monitors the state of the UP and DOWN pins
on the ADM1186-1 or the UP/DOWN pin on the ADM1186-2
to control the supply sequencing direction (see Figure 2). In the
WAIT START state, a rising edge transition on the UP or
UP/DOWN pin triggers a power-up sequence. A falling edge
transition on the DOWN or UP/DOWN pin in the POWER-UP
DONE state triggers a power-down sequence.
APPLICATION DIAGRAM
5V
5V
IN
ADP1706
EN OUT
5V
2.5V
5V
IN
ADP2107
EN OUT
3.3V AUX
3.3V AUX
IN
1.8V
3.3V AUX
1μF
ADP1821
EN OUT
5V
1.2V
5V
IN
ADP1706
3.3V
3.3V AUX
100nF
EN
OUT
VCC
OUT1
OUT2
OUT3
OUT4
FAULT
VIN1
SEQUENCE CONTROL
UP
DOWN
ADM1186-1
VIN2
VIN3
VIN4
DLY_EN_OUT1
DLY_EN_OUT2
2.5V AUX
DLY_EN_OUT3
DLY_EN_OUT4
PWRGD
3.3V AUX
BLANK_DLY
GND
SEQ_DONE
Figure 1.
Rev. B
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 ?2008–2013 Analog Devices, Inc. All rights reserved.
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