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ADM1203-1AUJ

更新时间： 2024-11-09 15:31:47
品牌 Logo 应用领域
亚德诺 - ADI 光电二极管
页数 文件大小 规格书
8页 406K
描述
IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, MO-193BA, TSOT-8, Power Management Circuit

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ADM1203-1AUJ 数据手册

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TM  
Simple Tracker with  
Circuit Breaker  
Preliminary Technical Data  
ADM1203  
every cycle determined by the capacitor on the TIMER pin and  
the ADM1203-3/4 will latch off the gate until the  
up/down(stop) pin is toggled.  
FEATURES  
Enables Power Supply Tracking of multiple Supplies  
Monitors Current on Supply being Tracked  
Up/Down Tracking limits Supply Differences to ~100mV  
Capacitor Adjustable Slew Rate  
The ADM1203 is packaged in a tiny 8-pin TSOT package.  
On Board Charge Pump Fully enhances FET  
Ability to Track Down Supplies (ADM1203-1/3)  
Emergency Shutdown Feature (ADM1203-2/4)  
Auto retry after Current Fault (ADM1203-1/2)  
Latch off after Current Fault (ADM1203-3/4)  
Packaged in tiny 8-Lead TSOT Package  
Functional Block Diagram  
R
s
Q
1
V
V
IN  
OUT  
V
CC  
RS-  
VCC  
APPLICATIONS  
Multi-Voltage Supply Rail Tracker  
Telecoms and Datacom s Systems  
Multi voltage Network Processors , FPGAs, ASICs, DSPs  
PC/Server Applications  
GATE  
20nF  
UP/DOWN  
(ADM1203-1/3)  
FET  
DRIVER  
UP/STOP  
(ADM1203-2/4)  
LOGIC  
C
SLEW  
SLEW RATE  
CONTROL  
V
OUT  
C
TIMER  
TIMER  
GENERAL DESCRIPTION  
CONTROL  
C
SLEW  
ADM1203  
The ADM1203 is a cascadable Simple Tracker TM device which  
ensures that voltage rails track within ~100mV of each other in  
multi supply systems. Any number of these devices can be  
cascaded to form a multi supply tracking solution.  
C
GND  
TIMER  
Applications Diagram  
The ADM1203 requires 2.7V to 16.5V on its Vcc pin to operate.  
An on-board charge pump generates a high voltage GATE drive  
to fully enhance FETs in the power path.  
R
SENSE  
Q
1
5VIN  
5VOUT  
RS-  
V
cc  
POWER ON/OFF  
UP/DOWN  
GATE  
The Slew Rate of the ramp is adjustable via an external capacitor  
on the CSLEW pin and can be programmed from 100V/s to  
1000V/s. When multiple devices are cascaded the CSLEW pin of  
each subsequent device should be tied to the output rail of the  
previous device to ensure that supply will track up and down  
with the previous supply.  
1nF  
ADM1203-1  
SLEW  
TIMER  
TIMER  
C
SLEW  
V
OUTFB  
GND  
C
R
SENSE  
Q
1
3.3VIN  
3.3VOUT  
RS-  
V
cc  
The ADM1203 is offered in four variants. The ADM1203-1/3  
features an UP/DOWNb pin and the ADM1203-2/4 features an  
Up/STOPb pin. The ADM1203-1/2 features an auto retry on  
current RS fault and the ADM1203-3/4 latches off. For all  
devices, a high level on the input will initiate tracking power up  
sequence. A low on the UP/DOWNb pin of the ADM1203-1/3  
will initiate a tracking down of the supply rails, while a low on  
the UP/STOPb pin of the ADM1203-2/4 will initiate an  
emergency fast shutdown of all supply rails simultaneously.  
POWER ON/OFF  
UP/DOWN  
GATE  
1nF  
ADM1203-1  
SLEW  
V
OUTFB  
TIMER  
GND  
C
TIMER  
R
SENSE  
Q
1
2.7VIN  
2.7VOUT  
RS-  
V
cc  
POWER ON/OFF  
UP/DOWN  
GATE  
1nF  
ADM1203-1  
The ADM1203 features a current sense comparator, which  
monitors for an over current condition on the supply. In the  
event of an over current condition, a fault is flagged and the gate  
is switched off. The ADM1203-1/2 will auto retry this fault at  
SLEW  
TIMER  
TIMER  
V
OUTFB  
GND  
C
Rev. PrD  
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 companies.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
www.analog.com  
Analog Devices, Inc. All rights reserved.  
2005  
12345678

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