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Secuenciadores

LM3881

ACTIVO

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

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LM3881

ACTIVO
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Detalles del producto

Supply voltage (min) (V) 2.7 Number of supplies monitored 3 Supply voltage (max) (V) 5.5 Iq (typ) (mA) 0.08 Number of sequenced outputs 3 Rating Catalog Operating temperature range (°C) -40 to 125
Supply voltage (min) (V) 2.7 Number of supplies monitored 3 Supply voltage (max) (V) 5.5 Iq (typ) (mA) 0.08 Number of sequenced outputs 3 Rating Catalog Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Easiest Method to Sequence Rails
  • Power-Up and Power-Down Control
  • Tiny Footprint
  • Low Quiescent Current of 80 µA
  • Input Voltage Range of 2.7 V to 5.5 V
  • Output Invert Feature
  • Timing Controlled by Small Value External
    Capacitor
  • Easiest Method to Sequence Rails
  • Power-Up and Power-Down Control
  • Tiny Footprint
  • Low Quiescent Current of 80 µA
  • Input Voltage Range of 2.7 V to 5.5 V
  • Output Invert Feature
  • Timing Controlled by Small Value External
    Capacitor

The LM3881 Simple Power Sequencer offers the easiest method to control power up and power down of multiple power supplies (switching or linear regulators). By staggering the start-up sequence, it is possible to avoid latch conditions or large inrush currents that can affect the reliability of the system.

Available in VSSOP-8 package, the Simple Sequencer contains a precision enable pin and three open-drain output flags. When the LM3881 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. Time delays are defined using an external capacitor and the output flag states can be inverted by the user.

The LM3881 Simple Power Sequencer offers the easiest method to control power up and power down of multiple power supplies (switching or linear regulators). By staggering the start-up sequence, it is possible to avoid latch conditions or large inrush currents that can affect the reliability of the system.

Available in VSSOP-8 package, the Simple Sequencer contains a precision enable pin and three open-drain output flags. When the LM3881 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. Time delays are defined using an external capacitor and the output flag states can be inverted by the user.
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Documentación técnica

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Tipo Título Fecha
* Data sheet LM3881 Simple Power Sequencer With Adjustable Timing datasheet (Rev. D) PDF | HTML 10 dic 2014
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 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
Analog Design Journal Power-supply sequencing for FPGAs 24 oct 2014
EVM User's guide AN-1785 LM3881 Power Sequencer Evaluation Board (Rev. C) 07 may 2013
Application note Power Supply Design Considerations for Modern FPGAs (Power Designer 121) 02 feb 2010

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM3881EVAL — Placa de evaluación para secuenciador de potencia LM3881

The LM3881 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 (...)

Guía del usuario: PDF
No disponible en TI.com
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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Diseños de referencia

TIDA-01466 — Diseño de referencia de fuente de alimentación de baja tensión y bajo ruido para el extremo frontal

This reference design is a power supply optimized specifically for providing power to eight 16-channel receive AFE ICs for ultrasound imaging systems. This design reduces part count while maximizing efficiency by using single-chip DC-DC converter + LDO combo regulators to set the LDO input just (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-01568 — Diseño de referencia de secuenciación de potencia de 5 carriles y 12 mm x 12 mm para procesadores de

This reference design demonstrates a validated and cost competitive power sequencing solution for an application processor or a high performance control platform. This design supports 5 different voltage rails, optimized with layout space of 12 mm × 12 mm. The design is also capable of (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-010011 — Diseño de referencia de arquitectura de fuente de alimentación de alta eficiencia para módulo de pro

This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

PMP7877 — Diseño de referencia de alimentación para Xilinx® Zynq® -7000

The PMP7877 reference design provides all the rails necessary to power a Xilinx® Zynq®-7000 series SoC.  It operates from an input voltage range of 10.8Vin to 13.2Vin and has seven regulated outputs: 1Vout @ 5A, 1.8Vout @ 2.5A, 1.5Vout @ 6A, 3.3Vout @ 5A, 3.3Vout @ 5A, 5Vout @ 2A, and (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP9464 — Diseño de referencia de módulo de alimentación SIMPLE SWITCHER® de 30 A y 3 V a 14.5 V con PMBus

The reference design PMP9464 utilizes the LMZ31530, a 30A SIMPLE SWITCHER® Power Module. The LMZ31530 SIMPLE SWITCHER® power module is an easy-to-use integrated power solution that combines a 30-A DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low profile, QFN package.

(...)

Test report: PDF
Esquema: PDF
Paquete Pasadores Descargar
VSSOP (DGK) 8 Ver opciones
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Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
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  • Lugar de ensamblaje

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