LM3880MF-1AENOPB Datasheet, PDF (1/22 Pages) Texas Instruments – LM3880/LM3880Q-1 Power Sequencer

LM3880, LM3880Q-1
www.ti.com
SNVS451I – AUGUST 2006 – REVISED MARCH 2013
LM3880/LM3880Q-1 Power Sequencer
Check for Samples: LM3880, LM3880Q-1
FEATURES
1
•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
• Low Quiescent Current of 25 µA
• Standard Timing Options Available
• 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
• Multiple Supply Sequencing
• Microprocessor / Microcontroller Sequencing
• FPGA Sequencing
• Automotive
DESCRIPTION
The LM3880 Power Sequencer offers the easiest
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.
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.
EPROM capability allows every delay and sequence
to be fully adjustable. Contact Texas Instruments if a
non-standard configuration is required.
Typical Application Circuit
Power Supply 1
Input
Supply
Enable
VCC
Enable
FLAG 1
EN
FLAG 2
FLAG 3
GND
Power Supply 2
Enable
Power Supply 3
Enable
1
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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