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參數資料
| 型號： | ADM1065 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Super Sequencer-TM and Monitor |
| 中文描述： | 超音序器- TM和監視器 |
| 文件頁數： | 10/28頁 |
| 文件大小： | 497K |
| 代理商： | ADM1065 |
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ADM1065
POWERING THE ADM1065
The ADM1065 is powered from the highest voltage input on
either the positive-only supply inputs (VPn) or the high voltage
supply input (VH). This technique offers improved redundancy
as the device is not dependent on any particular voltage rail to
keep it operational. The same pins are used for supply fault
detection (discussed later in the next section). A VDD arbitrator
on the device chooses which supply to use. The arbitrator can
be considered an OR’ing of five LDOs together. A supply
comparator chooses which of the inputs is highest and selects
this one to provide the on-chip supply. There is minimal
switching loss with this architecture (~0.2 V), resulting in the
ability to power the ADM1065 from a supply as low as 3.0 V.
Note that the supply on the VXn pins cannot be used to power
the device.
Rev. 0 | Page 10 of 28
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 15. The capacitor has
another use during brownouts (momentary loss of power).
Under these conditions, when the input supply (VPn 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
cap can then act as a reservoir to keep the device active
until the next highest supply takes over the powering of the
device. 10 μF is recommended for this reservoir/decoupling
function.
Note that when two or more supplies are within 100 mV of each
other, the supply that takes control of V
DD
first keeps control.
For example, if VP1 is connected to a 3.3 V supply, then 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.
SUPPLY
COMPARATOR
IN
EN
OUT
4.75V
LDO
IN
EN
OUT
4.75V
LDO
IN
EN
OUT
4.75V
LDO
IN
EN
OUT
4.75V
LDO
IN
EN
OUT
4.75V
LDO
VH
VP4
VP3
VP2
VP1
VDDCAP
INTERNAL
DEVICE
SUPPLY
0
Figure 15. VDD Arbitrator Operation
相關PDF資料 |
PDF描述 |
|---|---|
| ADM1065ACP | Super Sequencer-TM and Monitor |
| ADM1065ACP-REEL | Super Sequencer-TM and Monitor |
| ADM1065ACP-REEL7 | Super Sequencer-TM and Monitor |
| ADM1065ASU | Super Sequencer-TM and Monitor |
| ADM1065ASU-REEL | Super Sequencer-TM and Monitor |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM1065ACP | 制造商:Analog Devices 功能描述:Volt Supervisor Sequencer/Monitor 2.7V to 5.4V 40-Pin LFCSP EP |
| ADM1065ACP-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Super Sequencer-TM and Monitor |
| ADM1065ACP-REEL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Super Sequencer-TM and Monitor |
| ADM1065ACPZ | 功能描述:IC SEQUENCER/SUPERVISOR 40-LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 監控器 系列:Super Sequencer® 標準包裝:1 系列:- 類型:簡單復位/加電復位 監視電壓數目:1 輸出:開路漏極或開路集電極 復位:高有效 復位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應商設備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
| ADM1065ASU | 制造商:AD 制造商全稱:Analog Devices 功能描述:Super Sequencer-TM and Monitor |
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