GND

EN

VCC

FLAG 1

FLAG 2

FLAG 3

Enable

Enable

Enable

Power Supply 1

Power Supply 2

Power Supply 3

Input

Supply

Enable

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM3880, LM3880-Q1

SNVS451K – AUGUST 2006 – REVISED FEBRUARY 2016

LM3880/LM3880-Q1 Simple Power Sequencer

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade: -40°C to 125°C

Operating Junction Temperature Range

•

Easiest Method to Sequence Rails

•

Power-Up and Power-Down Control

•

Tiny Footprint

•

Low Quiescent Current of 25 µA

•

Input Voltage Range of 2.7 V to 5.5 V

•

Standard Timing Options Available

•

Customization of Timing and Sequence Available

Through Factory Programmability

2 Applications

•

Advanced Driver Assistance Systems (ADAS)

•

Automotive Camera Modules

•

Security Cameras

•

Servers

•

Networking Elements

•

FPGA Sequencing

•

Microprocessor and Microcontroller Sequencing

•

Multiple Supply Sequencing

3 Description

The LM3880 Simple Power Supply Sequencer offers

the easiest method to control power up sequencing

and power down sequencing of multiple Independent

voltage rails. 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 6-pin SOT-23-6 package, the Simple

Sequencer contains a precision enable pin and three

open-drain

output

flags.

When

the

LM3880

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.

EPROM capability allows every delay and sequence

to be fully adjustable. Contact Texas Instruments if a

nonstandard configuration is required.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM3880

DBV SOT (6)

2.90 mm x 1.60 mm

LM3880-Q1

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simple Power Supply Sequencing