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Administración de potencia
Secuenciadores

LM3880

ACTIVO

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

Number of sequenced outputs 3 Rating Catalog Iq (typ) (mA) 0.025 Time delay (ms) 2, 10, 16, 30, 60, 120 Operating temperature range (°C) -40 to 125
Number of sequenced outputs 3 Rating Catalog Iq (typ) (mA) 0.025 Time delay (ms) 2, 10, 16, 30, 60, 120 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • 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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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM3880 Simple Power Sequencer datasheet (Rev. M) PDF | HTML 15/03/2021
Nota sobre la aplicación High-Performance CMOS Image Sensor Power Supply in Industrial Camera and Vision (Rev. A) 30/07/2021
Application brief Creating a Sequencing Voltage Supervisor (Reset IC) Using TPS386000 and LM3880 14/05/2019
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Artículo técnico How to manage processor power during uncontrolled power off PDF | HTML 21/06/2018
Artículo técnico FPGA power made simple: sequencing PDF | HTML 13/11/2017
Artículo técnico Sequencing solutions: simple, reliable and cost-effective PDF | HTML 27/09/2017
Artículo técnico A simple six-channel power-rail sequencing solution PDF | HTML 16/11/2015
Artículo técnico Multiphase DC/DC converters provide low ripple, integrated solution for FPGA power PDF | HTML 9/07/2015
Analog Design Journal Analog Applications Journal 4Q 2014 24/10/2014
Analog Design Journal Power-supply sequencing for FPGAs 24/10/2014
Nota sobre la aplicación LM1771 and LM3880 Based FPGA Power Supply Reference Design (Rev. A) 5/05/2013
Nota sobre la aplicación AN-1603 LM274X Reference Designs (Rev. C) 1/05/2013
Nota sobre la aplicación Power Supply Design Considerations for Modern FPGAs (Power Designer 121) 2/02/2010

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) - Modelo PSpice
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SOT-23 (DBV) 6 Ultra Librarian
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