Texas Instruments LM3880-Q1 Bedienungsanleitung

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LM3880-Q1 Three-Rail Simple Power Supply Sequencer

1 Features

•Qualified for automotive applications

•AEC-Q100 qualified with the following results:

–Device temperature grade: –40°C to 125°C

junction uemperature range

•Simple solution for sequencing three voltage rails

from a single input signal

•Easily cascade up to three devices to sequence as

many as nine voltage rails

•Powerup and powerdown control

•Tiny 2.9-mm x 1.6-mm footprint

•Low quiescent current: 25 µA

•Input voltage range: 2.7 V to 5.5 V

•Standard timing options available

2 Applications

•Advanced driver assistance systems (ADAS)

•Automotive camera modules

•Security cameras

•Servers

•Networking elements

•FPGA power supply sequencing

•Microprocessor and microcontroller sequencing

•Multiple supply sequencing

3 Description

The LM3880-Q1 simple power supply sequencer

offers the easiest method to control powerup

sequencing and powerdown 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 package, the simple

sequencer contains a precision enable pin and three

open-drain output flags. The open-drain output flags

permit that they can be pulled up to distinct voltage

supplies separate from the sequencer V

DD

(only if

they do not exceed the recommended maximum

voltage of 0.3 V greater than V

DD

), so as to interface

with ICs requiring a range of different enable signals.

When the LM3880-Q1 is enabled, the three output

flags sequentially release, after individual time delays,

thus permitting the connected power supplies to start

up. The output flags 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 to

request a non-standard configuration.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

LM3880-Q1DBV SOT (6)2.90 mm × 1.60 mm

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

the end of the datasheet.

FLAG1

6

EN

5FLAG2

1

4FLAG3

VCC

Power

Supply 2

Enable

3

GND

2

Enable

Input Supply

Power

Supply 1

Enable

Power

Supply 3

Enable

Simple Power Supply Sequencing

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LM3880-Q1

SNVSB87A – NOVEMBER 2018 – REVISED MARCH 2021

Copyright ©2021 Texas Instruments Incorporated

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LM3880-Q1

SNVSB87A – NOVEMBER 2018 – REVISED MARCH 2021

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.

Produktspezifikationen