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LM3880

更新时间： 2024-02-27 18:11:49
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德州仪器 - TI /
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LM3880/LM3880Q-1 Power Sequencer

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LM3880 数据手册

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LM3880, LM3880Q-1  
www.ti.com  
SNVS451I –AUGUST 2006–REVISED MARCH 2013  
LM3880/LM3880Q-1 Power Sequencer  
Check for Samples: LM3880, LM3880Q-1  
1
FEATURES  
DESCRIPTION  
The LM3880 Power Sequencer offers the easiest  
2
•
•
•
•
•
•
•
Easiest Method to Sequence Rails  
Power Up and Power Down Control  
Input Voltage Range of 2.7V to 5.5V  
Small Footprint SOT-23-6  
method to control power up and power down of  
multiple power supplies (switchers or linear  
regulators). By staggering the startup sequence, it is  
possible to avoid latch conditions or large in-rush  
currents that can affect the reliability of the system.  
Low Quiescent Current of 25 µA  
Standard Timing Options Available  
Available in  
a SOT-23-6 package, the Power  
Sequencer contains a precision enable pin and three  
open drain output flags. Upon enabling the LM3880  
the three output flags will sequentially release, after  
individual time delays, permitting the connected  
power supplies to startup. The output flags will follow  
a reverse sequence during power down to avoid latch  
conditions.  
Customization of Timing and Sequence  
Available through Factory Programmability  
•
LM3880Q is AEC-Q100 Grade 1 Qualified and  
is Manufactured on an Automotive Grade Flow  
APPLICATIONS  
EPROM capability allows every delay and sequence  
to be fully adjustable. Contact Texas Instruments if a  
non-standard configuration is required.  
•
•
•
•
Multiple Supply Sequencing  
Microprocessor / Microcontroller Sequencing  
FPGA Sequencing  
Automotive  
Typical Application Circuit  
Power Supply 1  
Enable  
Input  
Supply  
VCC  
Power Supply 2  
Enable  
FLAG 1  
FLAG 2  
FLAG 3  
Enable  
EN  
GND  
Power Supply 3  
Enable  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2006–2013, Texas Instruments Incorporated  
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