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參數(shù)資料
| 型號： | ADM6820 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | FET Drive Simple Sequencers |
| 中文描述： | 場效應(yīng)管驅(qū)動器簡單排序 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 162K |
| 代理商： | ADM6820 |
FET Drive Simple Sequencers
ADM6819/ADM6820
FEATURES
Single chip enables power supply sequencing of two
supplies
On-board charge pump fully enhances N-channel FET
Adjustable primary supply monitor to 0.618 V
Delay from primary supply to secondary supply enabled
Fixed 300 ms delay (ADM6819)
Capacitor adjustable delay (ADM6820)
Logic/analog driven enable input (ADM6819)
40°C to +85°C operating range
Packaged in small 6-lead SOT-23 package
Pin-to-pin compatibility with MAX6819/MAX6820
APPLICATIONS
Multivoltage systems
Dual voltage microprocessors/FPGAs/ASICs/DSPs
Network processors
Telecom and datacom systems
PC/server applications
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
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAM
V
CC2
V
CC2
OUT
Q1
GATE
LOGIC
V
CC2
V
FET
SETV
SETD (ADM6820)
Figure 1.
0.618V
0.618V
GND
R1
R2
V
CC1
ADM6819/
ADM6820
V
CC1
V
CC1
DFET
CPUMP
TIMER
UVLO
0
GENERAL DESCRIPTION
The ADM6819 and ADM6820 are simple power supply sequencers
with FET drive capability for enhancing N-channel MOSFETs.
These devices can monitor a primary supply voltage and
enable/disable an external N-channel FET for a secondary
supply. The ADM6819 has the ability to monitor two supplies.
When more than two voltages require sequencing, multiple
ADM6819/ADM6820 devices can be cascaded to achieve this.
The devices operate over a supply range of 2.95 V to 5.5 V.
An internal comparator monitors the primary supply using the
VSET pin. The input to this comparator is externally set via a
resistor divider from the primary supply. When the voltage at
the VSET pin rises above the comparator threshold, an internal
charge pump on the GATE output enhances the secondary
supply FET.
The ADM6819 features an enable (EN) pin that is fed to the
input of an additional comparator and reference circuit. This
pin can be used as a digital enable or a secondary power good
comparator to monitor a second supply and enables the GATE
only if both supplies are valid. When both inputs of the internal
comparators are above the threshold, a fixed 300 ms timeout
occurs before the GATE is driven high and the secondary
supply is enabled.
The ADM6820 has only one comparator that is on the SETV
pin. It also features a timeout period that is adjustable via a
single external capacitor on the SETD pin.
The ADM6819/ADM6820 are packaged in small 6-lead SOT-23
packages.
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相關(guān)代理商/技術(shù)參數(shù) |
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| ADM6820ARJZ-REEL7 | 功能描述:IC POWER SEQUENCER SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:Simple Sequencers® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| ADM6821 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage Supervisory Circuits with Watchdog & Manual Reset in 5-Lead SOT-23 |
| ADM6821LART-RL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage Supervisory Circuits with Watchdog & Manual Reset in 5-Lead SOT-23 |
| ADM6821LART-RL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage Supervisory Circuits with Watchdog & Manual Reset in 5-Lead SOT-23 |
| ADM6821MART-RL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Voltage Supervisory Circuits with Watchdog & Manual Reset in 5-Lead SOT-23 |
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