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LM2854

ACTIVO

Regulador reductor síncrono de 4 A y 500 kHz/1 MHz

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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 5.5 Vin (min) (V) 2.95 Vout (max) (V) 5 Vout (min) (V) 0.8 Features Enable, Synchronous Rectification, Tracking Control mode Voltage mode Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0017 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 5.5 Vin (min) (V) 2.95 Vout (max) (V) 5 Vout (min) (V) 0.8 Features Enable, Synchronous Rectification, Tracking Control mode Voltage mode Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0017 Duty cycle (max) (%) 100
HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 mm)
  • Input Voltage Range of 2.95 V to 5.5 V
  • Maximum Load Current of 4 A
  • Wide Bandwidth Voltage Mode Control Loop, Partial Internal Compensation
  • Fixed Switching Frequency of 500 kHz or 1 MHz
  • 35-mΩ Integrated MOSFET Switches
  • Adjustable Output Voltage Down to 0.8 V
  • Optimized Reference Voltage Initial Accuracy and Temperature Drift
  • External Soft-Start Control With Tracking Capability
  • Enable Pin With Hysteresis
  • Low Standby Current of 230 µA
  • Pre-Biased Load Start-up Capability
  • Integrated UVLO, OCP, and Thermal Shutdown
  • 100% Duty Cycle Capability
  • HTSSOP-16 Exposed Pad Package
  • Input Voltage Range of 2.95 V to 5.5 V
  • Maximum Load Current of 4 A
  • Wide Bandwidth Voltage Mode Control Loop, Partial Internal Compensation
  • Fixed Switching Frequency of 500 kHz or 1 MHz
  • 35-mΩ Integrated MOSFET Switches
  • Adjustable Output Voltage Down to 0.8 V
  • Optimized Reference Voltage Initial Accuracy and Temperature Drift
  • External Soft-Start Control With Tracking Capability
  • Enable Pin With Hysteresis
  • Low Standby Current of 230 µA
  • Pre-Biased Load Start-up Capability
  • Integrated UVLO, OCP, and Thermal Shutdown
  • 100% Duty Cycle Capability
  • HTSSOP-16 Exposed Pad Package

The LM2854 PowerWise™ buck regulator is a 500-kHz or 1-MHz step-down switching voltage regulator capable of driving up to a 4-A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LM2854 can accept an input voltage rail between 2.95 V and 5.5 V, and deliver an adjustable and highly accurate output voltage as low as 0.8 V. Externally established soft-start with a small capacitor facilitates controlled start-up, and the LM2854 is capable of starting gracefully into a pre-biased output voltage. Partial internal compensation reduces the number of external passive components and PC board space typically necessary in a voltage mode buck converter application, yet preserving flexibility to deal with ceramic and/or electrolytic based load capacitors. Lossless cycle-by-cycle peak current limit is used to protect the load from an overcurrent or short-circuit fault, and an enable comparator simplifies sequencing applications. The LM2854 is available in an exposed pad HTSSOP-16 package that enhances the thermal performance of the regulator.

The LM2854 PowerWise™ buck regulator is a 500-kHz or 1-MHz step-down switching voltage regulator capable of driving up to a 4-A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LM2854 can accept an input voltage rail between 2.95 V and 5.5 V, and deliver an adjustable and highly accurate output voltage as low as 0.8 V. Externally established soft-start with a small capacitor facilitates controlled start-up, and the LM2854 is capable of starting gracefully into a pre-biased output voltage. Partial internal compensation reduces the number of external passive components and PC board space typically necessary in a voltage mode buck converter application, yet preserving flexibility to deal with ceramic and/or electrolytic based load capacitors. Lossless cycle-by-cycle peak current limit is used to protect the load from an overcurrent or short-circuit fault, and an enable comparator simplifies sequencing applications. The LM2854 is available in an exposed pad HTSSOP-16 package that enhances the thermal performance of the regulator.

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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 LM2854 4-A 500-kHz / 1-MHz Synchronous Buck Regulator datasheet (Rev. E) PDF | HTML 4/10/2017
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Nota sobre la aplicación AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23/04/2013

Diseño y desarrollo

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