Inicio Gestión de la energía Controladores CA/CC y CC/CC (FET externo)
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Gestión de la energía
Controladores CA/CC y CC/CC (FET externo)

LM2640

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Controlador reductor doble de modo D-CAP2 síncrono de 5.5 V a 30 V, 200 kHz con LDO

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LM2640

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Detalles del producto

Vin (min) (V) 5.5 Vin (max) (V) 30 Iout (max) (A) 5 Operating temperature range (°C) 0 to 125 Control mode D-CAP2, current mode Topology Buck Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Features Enable, Frequency synchronization, Light Load Efficiency Iq (typ) (µA) 600 Duty cycle (max) (%) 98 Number of phases 2
Vin (min) (V) 5.5 Vin (max) (V) 30 Iout (max) (A) 5 Operating temperature range (°C) 0 to 125 Control mode D-CAP2, current mode Topology Buck Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Features Enable, Frequency synchronization, Light Load Efficiency Iq (typ) (µA) 600 Duty cycle (max) (%) 98 Number of phases 2
TSSOP (PW) 28 62.08 mm² 9.7 x 6.4
  • 200 kHz Fixed-Frequency Switching
  • Switching Synchronization with an External Signal up to 400 kHz
  • Optional Pulse-Skipping Mode
  • Adjustable Secondary Feedback
  • Input Undervoltage Lockout
  • Output Undervoltage Shutdown Protection
  • Output Overvoltage Shutdown Protection
  • Programmable Soft-Start (Each Controller)
  • 5V, 50 mA Linear Regulator Output
  • Precision 2.5V Reference Output
  • 28-Pin Package

Key Specifications

  • 96% Efficient
  • 5.5V to 30V Input Range
  • Dual Outputs Adjustable from 2.2V to 6V
  • 0.5% Typical Load Regulation Error
  • 0.002%/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

  • 200 kHz Fixed-Frequency Switching
  • Switching Synchronization with an External Signal up to 400 kHz
  • Optional Pulse-Skipping Mode
  • Adjustable Secondary Feedback
  • Input Undervoltage Lockout
  • Output Undervoltage Shutdown Protection
  • Output Overvoltage Shutdown Protection
  • Programmable Soft-Start (Each Controller)
  • 5V, 50 mA Linear Regulator Output
  • Precision 2.5V Reference Output
  • 28-Pin Package

Key Specifications

  • 96% Efficient
  • 5.5V to 30V Input Range
  • Dual Outputs Adjustable from 2.2V to 6V
  • 0.5% Typical Load Regulation Error
  • 0.002%/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

The LM2640 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

Fixed-frequency synchronous drive of logic-level N-channel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range. The pulse-skipping mode can be disabled in favor of fixed-frequency operation regardless of the load current level.

High DC gain and current-mode feedback control assure excellent line and load regulation and a wide loop bandwidth for fast response to dynamic loads.

An internal oscillator fixes the switching frequency at 200 kHz. Optionally, switching can be synchronized to an external clock running as fast as 400 kHz.

An optional soft-start feature limits current surges from the input power supply at start up and provides a simple means of start-up sequencing.

Logic-level inputs allow the controllers to be turned ON and OFF separately.

The LM2640 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

Fixed-frequency synchronous drive of logic-level N-channel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range. The pulse-skipping mode can be disabled in favor of fixed-frequency operation regardless of the load current level.

High DC gain and current-mode feedback control assure excellent line and load regulation and a wide loop bandwidth for fast response to dynamic loads.

An internal oscillator fixes the switching frequency at 200 kHz. Optionally, switching can be synchronized to an external clock running as fast as 400 kHz.

An optional soft-start feature limits current surges from the input power supply at start up and provides a simple means of start-up sequencing.

Logic-level inputs allow the controllers to be turned ON and OFF separately.
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Documentación técnica

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* Data sheet LM2640 Dual Adjustable Step-Down Switching Power Supply Controller datasheet (Rev. B) 03 abr 2013

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
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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