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| 型号： | ADM1168ASTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/28页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCER/SUPERVISOR 32LQFP |
| 标准包装： | 1 |
| 系列： | Super Sequencer® |
| 应用： | 电源监控器，序列发生器 |
| 输入电压： | 3 V ~ 14.4 V |
| 电源电压： | 3 V ~ 14.4 V |
| 电流 - 电源： | 4.2mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-LQFP |
| 供应商设备封装： | 32-LQFP（7x7） |
| 包装： | 托盘 |
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ADM1168
POWERING THE ADM1168
The ADM1168 is powered from the highest voltage input on either
the positive-only supply inputs (VPx) or the high voltage supply
input (VH). This technique offers improved redundancy because
the device is not dependent on any particular voltage rail to keep
it operational. The same pins are used for supply fault detection
(see the Supply Supervision section). A V DD arbitrator on the
Data Sheet
When two or more supplies are within 100 mV of each other, the
supply that first takes control of V DD keeps control. For example, if
VP1 is connected to a 3.3 V supply, V DD powers up to approximately
3.1 V through VP1. If VP2 is then connected to another 3.3 V
supply, VP1 still powers the device, unless VP2 goes 100 mV
higher than VP1.
device chooses which supply to use. The arbitrator can be
considered an OR’ing of four low dropout regulators (LDOs)
together. A supply comparator chooses the highest input to
provide the on-chip supply. There is minimal switching loss
with this architecture (~0.2 V), resulting in the ability to power
the ADM1168 from a supply as low as 3.0 V. Note that the supply
on the VXx pins cannot be used to power the device.
An external capacitor to GND is required to decouple the on-chip
supply from noise. This capacitor should be connected to the
VDDCAP pin, as shown in Figure 14. The capacitor has another
use during brownouts (momentary loss of power). Under these
VP1
VP2
VP3
VH
IN
EN
IN
EN
IN
EN
IN
EN
OUT
4.75V
LDO
OUT
4.75V
LDO
OUT
4.75V
LDO
OUT
4.75V
LDO
VDDCAP
INTERNAL
DEVICE
SUPPLY
conditions, when the input supply (VPx or VH) dips transiently
below V DD , the synchronous rectifier switch immediately turns off
so that it does not pull V DD down. The V DD capacitor can then
act as a reservoir to keep the device active until the next highest
supply takes over the powering of the device. A 10 μF capacitor is
recommended for this reservoir/decoupling function.
The value of the VDDCAP capacitor may be increased if it is
necessary to guarantee a complete fault record is written into
EEPROM should all supplies fail. The value of the capacitor to
Supply section.
The VH input pin can accommodate supplies up to 14.4 V, which
allows the ADM1168 to be powered using a 12 V backplane supply.
In cases where this 12 V supply is hot swapped, it is recommended
that the ADM1168 not be connected directly to the supply. Suitable
precautions, such as the use of a hot swap controller or RC filter
network, should be taken to protect the device from transients
that may cause damage during hot swap events.
Rev. A | Page 10 of 28
SUPPLY
COMPARATOR
Figure 14. V DD Arbitrator Operation
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| ADM1168ASTZ-RL7 | 功能描述:IC SEQUENCER/SUPERVISOR 32LQFP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:Super Sequencer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ADM1169ACPZ | 功能描述:IC SEQUENCER/SUPERVISOR 40LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:Super Sequencer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ADM1169ACPZ-RL7 | 功能描述:IC SEQUENCER/SUPERVISOR 40LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:Super Sequencer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ADM1169ARTZ | 制造商:Analog Devices 功能描述:SUPER SEQUENCER W/ BLACK BOX - Tape and Reel |
| ADM1169ASTZ | 功能描述:IC SEQUENCER/SUPERVISOR 32LQFP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:Super Sequencer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
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