LM3881 Texas instruments

LM3881

Уточнить цену

LM3881

Уточнить цену

СРАВНИТЬ

В СРАВНЕНИИ

Уточнить цену

Описание

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.

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

Supply voltage (min) (V)	2.7
Number of supplies monitored	3
Supply voltage (max) (V)	5.5
Iq (typ) (mA)	0.08
Number of sequenced outputs	3
Rating	Catalog
Operating temperature range (°C)	-40 to 125