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LM3103

AKTIV

Synchroner 1 MHz 0,75-A-Abwärts-Spannungsregler

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LMR33610 AKTIV Synchroner Abwärtswandler SIMPLE SWITCHER®, 3,8 bis 36 V, 1 A, in Gehäuse SOIC-8 Smaller footprint, higher efficiency, lower IQ and lower EMI.

LM3103

AKTIV
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Produktdetails

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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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LM3103 Synchronous 1-MHz 0.75-A Step-Down Voltage Regulator datasheet (Rev. G) PDF | HTML 29.01.2018
Anwendungshinweis Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25.03.2024
Auswahlhilfe Power Management Guide 2018 (Rev. R) 25.06.2018
Whitepaper Synchronous Rectification in High-Performance Power Converter Design (Rev. A) PDF | HTML 15.09.2016
Anwendungshinweis Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12.09.2014
Benutzerhandbuch AN-1678 LM3103 Demonstration Board Reference Design (Rev. A) 29.04.2013
Anwendungshinweis AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24.04.2013
Anwendungshinweis AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23.04.2013
Anwendungshinweis AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23.04.2013
Anwendungshinweis AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23.04.2013
Anwendungshinweis AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23.04.2013
Anwendungshinweis AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23.04.2013
Anwendungshinweis AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23.04.2013
Anwendungshinweis AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23.04.2013
Anwendungshinweis AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23.04.2013
Anwendungshinweis Input and Output Capacitor Selection 19.09.2005
Weitere Dokumente SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12.07.2005
Anwendungshinweis AN-643 EMI/RFI Board Design (Rev. B) 03.05.2004

Design und Entwicklung

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Evaluierungsplatine

LM3103EVAL — SIMPLE SWITCHER® Synchron-Abwärtsspannungsregler (1 MHz, 0,75 A) – Evaluierungsmodul

  • 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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