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LM3880

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Secuenciador de potencia simple de 3 carriles con retardo de tiempo fijo

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LM3880

ACTIVO
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Detalles del producto

Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 5.5 Iq (typ) (mA) 0.025 Time delay (ms) 2, 10, 16, 30, 60, 120 Number of sequenced outputs 3 Rating Catalog Operating temperature range (°C) -40 to 125
Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 5.5 Iq (typ) (mA) 0.025 Time delay (ms) 2, 10, 16, 30, 60, 120 Number of sequenced outputs 3 Rating Catalog Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • 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
  • 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

The LM3880 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 VDD (only if they do not exceed the recommended maximum voltage of 0.3 V greater than VDD), so as to interface with ICs requiring a range of different enable signals. When the LM3880 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.

The LM3880 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 VDD (only if they do not exceed the recommended maximum voltage of 0.3 V greater than VDD), so as to interface with ICs requiring a range of different enable signals. When the LM3880 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.
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Documentación técnica

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Tipo Título Fecha
* Data sheet LM3880 Simple Power Sequencer datasheet (Rev. M) 15 mar 2021
Application note High-Performance CMOS Image Sensor Power Supply in Industrial Camera and Vision (Rev. A) 30 jul 2021
Application brief Creating a Sequencing Voltage Supervisor (Reset IC) Using TPS386000 and LM3880 14 may 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Technical article How to manage processor power during uncontrolled power off PDF | HTML 21 jun 2018
Technical article FPGA power made simple: sequencing PDF | HTML 13 nov 2017
Technical article Sequencing solutions: simple, reliable and cost-effective PDF | HTML 27 sep 2017
Technical article A simple six-channel power-rail sequencing solution PDF | HTML 16 nov 2015
Technical article Multiphase DC/DC converters provide low ripple, integrated solution for FPGA power PDF | HTML 09 jul 2015
Analog Design Journal Analog Applications Journal 4Q 2014 24 oct 2014
Analog Design Journal Power-supply sequencing for FPGAs 24 oct 2014
EVM User's guide AN-1491 LM3880 Power Sequencer Demo Board (Rev. A) 07 may 2013
Application note LM1771 and LM3880 Based FPGA Power Supply Reference Design (Rev. A) 05 may 2013
Application note AN-1603 LM274X Reference Designs (Rev. C) 01 may 2013
Application note Power Supply Design Considerations for Modern FPGAs (Power Designer 121) 02 feb 2010

Diseño y desarrollo

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Placa de evaluación

LM3880EVAL — Secuenciador de potencia

The LM3880 evaluation board has been designed to connect directly to the power supplies of an existing system to enable sequencing. Upon enabling the device, the three open drain output flags will rise in sequential order, 1-2-3. Once the part is disabled, the shutdown sequence will occur in (...)

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Modelo de simulación

LM3880 PSpice Transient Model

SNVMBB4.ZIP (45 KB) - PSpice Model
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Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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