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LM3103

ACTIVO

Regulador de tensión reductor síncrono de 0.75A y 1 MHz

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LMR33610 ACTIVO Convertidor reductor sincrónico SIMPLE SWITCHER® de 3.8 V a 36 V, 1 A en encapsulado SOIC 8 Smaller footprint, higher efficiency, lower IQ and lower EMI.

LM3103

ACTIVO
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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 0.75 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 7 Vout (min) (V) 0.6 Features Enable, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode COT with emulated ripple Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.001 Duty cycle (max) (%) 94
Rating Catalog Topology Buck Iout (max) (A) 0.75 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 7 Vout (min) (V) 0.6 Features Enable, Over Current Protection, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode COT with emulated ripple Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.001 Duty cycle (max) (%) 94
HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 mm)
  • Input Voltage Range 4.5 V to 42 V
  • 0.75 A Output Current
  • 0.6V, ±2% Reference
  • Integrated Dual N-Channel Main and Synchronous MOSFETs
  • Low Component Count and Small Solution Size
  • Stable with Ceramic and Other Low ESR Capacitors
  • No Loop Compensation Required
  • High Efficiency at a Light Load by DCM Operation
  • Pre-bias Startup
  • Ultra-Fast Transient Response
  • Programmable Soft-Start
  • Programmable Switching Frequency up to 1 MHz
  • Valley Current Limit
  • Thermal Shutdown
  • Output Over-Voltage Protection
  • Precision Internal Reference for an Adjustable Output Voltage Down to 0.6 V
  • Thermally Enhanced HTSSOP-16 Package
  • Input Voltage Range 4.5 V to 42 V
  • 0.75 A Output Current
  • 0.6V, ±2% Reference
  • Integrated Dual N-Channel Main and Synchronous MOSFETs
  • Low Component Count and Small Solution Size
  • Stable with Ceramic and Other Low ESR Capacitors
  • No Loop Compensation Required
  • High Efficiency at a Light Load by DCM Operation
  • Pre-bias Startup
  • Ultra-Fast Transient Response
  • Programmable Soft-Start
  • Programmable Switching Frequency up to 1 MHz
  • Valley Current Limit
  • Thermal Shutdown
  • Output Over-Voltage Protection
  • Precision Internal Reference for an Adjustable Output Voltage Down to 0.6 V
  • Thermally Enhanced HTSSOP-16 Package

The LM3103 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 0.75 A to loads with an output voltage as low as 0.6 V. Dual N-Channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3103 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under-voltage lock-out. The LM3103 is available in the thermally enhanced HTSSOP-16 package.

The LM3103 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 0.75 A to loads with an output voltage as low as 0.6 V. Dual N-Channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3103 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under-voltage lock-out. The LM3103 is available in the thermally enhanced HTSSOP-16 package.
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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 LM3103 Synchronous 1-MHz 0.75-A Step-Down Voltage Regulator datasheet (Rev. G) PDF | HTML 29/01/2018
Nota sobre la aplicación Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25/03/2024
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Informe Synchronous Rectification in High-Performance Power Converter Design (Rev. A) PDF | HTML 15/09/2016
Nota sobre la aplicación Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12/09/2014
Guía del usuario AN-1678 LM3103 Demonstration Board Reference Design (Rev. A) 29/04/2013
Nota sobre la aplicación AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24/04/2013
Nota sobre la aplicación AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23/04/2013
Nota sobre la aplicación AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23/04/2013
Nota sobre la aplicación AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23/04/2013
Nota sobre la aplicación AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23/04/2013
Nota sobre la aplicación AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23/04/2013
Nota sobre la aplicación Input and Output Capacitor Selection 19/09/2005
Más documentación SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12/07/2005
Nota sobre la aplicación AN-643 EMI/RFI Board Design (Rev. B) 3/05/2004

Diseño y desarrollo

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Placa de evaluación

LM3103EVAL — Módulo de evaluación de regulador de tensión reductor de 0.75 A y 1 MHz síncrono SIMPLE SWITCHER®

  • Low component count and small solution size
  • Stable with ceramic and other low ESR capacitors
  • No loop compensation required
  • High efficiency at a light load by DCM operation
  • Pre-bias startup
  • Ultra-fast transient response
  • Programmable soft-start
  • Programmable switching frequency up to 1 MHz
  • Valley current (...)
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