电源序列发生器 - LM3881

LM3881 (正在供货)

电源序列发生器

 

描述

The LM3881 Simple Power Sequencer offers the easiest method to control power up and power down of multiple power supplies (switching or linear regulators). By staggering the start-up sequence, it is possible to avoid latch conditions or large inrush currents that can affect the reliability of the system.

Available in VSSOP-8 package, the Simple Sequencer contains a precision enable pin and three open-drain output flags. When the LM3881 is enabled, the three output flags will sequentially release, after individual time delays, thus permitting the connected power supplies to start up. The output flags will follow a reverse sequence during power down to avoid latch conditions. Time delays are defined using an external capacitor and the output flag states can be inverted by the user.

特性

  • Easiest Method to Sequence Rails
  • Power-Up and Power-Down Control
  • Tiny Footprint
  • Low Quiescent Current of 80 µA
  • Input Voltage Range of 2.7 V to 5.5 V
  • Output Invert Feature
  • Timing Controlled by Small Value External
    Capacitor

查看更多内容

参数 与其它产品相比 序列发生器

 
VCC (Min) (V)
VCC (Max) (V)
Iq (Typ) (uA)
Time Delay (ms)
Number of Sequenced Outputs
Rating
Pin/Package
LM3881 LM3880 LM3880-Q1
2.7    2.7    2.7   
5.5    5.5    5.5   
80    25    25   
Programmable    2
10
16
30
60
120   
2
10
16
30
60
120   
3    3    3   
Catalog    Catalog    Automotive   
8VSSOP    6SOT-23    6SOT-23   

WEBENCH® Designer LM3881

  Range
Vcc  V 2.70 to 5.50V
Number of Flags
Flag Delay  ms