Startseite Energiemanagement AC/DC- und DC/DC-Wandler (integrierter FET)
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Energiemanagement
AC/DC- und DC/DC-Wandler (integrierter FET)

LM22672-Q1

AKTIV

1 A-SIMPLE SWITCHER®, Abwärts-Spannungsregler mit einstellbarer Frequenz

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LM22672-Q1

AKTIV
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Produktdetails

Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Fixed Control mode Voltage mode Vout (min) (V) 1.285 Vout (max) (V) 37 Iq (typ) (µA) 3400 Duty cycle (max) (%) 90
Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Fixed Control mode Voltage mode Vout (min) (V) 1.285 Vout (max) (V) 37 Iq (typ) (µA) 3400 Duty cycle (max) (%) 90
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • Wide Input Voltage Range: 4.5 V to 42V
  • Internally Compensated Voltage Mode Control
  • Stable with Low ESR Ceramic Capacitors
  • 200 mΩ N-Channel MOSFET
  • Output Voltage Options:
    -ADJ (Outputs as Low as 1.285 V)
    -5.0 (Output Fixed to 5 V)
  • ±1.5% Feedback Reference Accuracy
  • 500 kHz Default Switching Frequency
  • Adjustable Switching Frequency and Synchronization
  • –40°C to 125°C Junction Temperature Range
  • Precision Enable Input
  • Integrated Boot-Strap Diode
  • Adjustable Soft-Start
  • Fully WEBENCH® Enabled
  • LM22672-Q1 is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
    Junction Temperature)
  • SO PowerPAD (Exposed Pad)
  • Wide Input Voltage Range: 4.5 V to 42V
  • Internally Compensated Voltage Mode Control
  • Stable with Low ESR Ceramic Capacitors
  • 200 mΩ N-Channel MOSFET
  • Output Voltage Options:
    -ADJ (Outputs as Low as 1.285 V)
    -5.0 (Output Fixed to 5 V)
  • ±1.5% Feedback Reference Accuracy
  • 500 kHz Default Switching Frequency
  • Adjustable Switching Frequency and Synchronization
  • –40°C to 125°C Junction Temperature Range
  • Precision Enable Input
  • Integrated Boot-Strap Diode
  • Adjustable Soft-Start
  • Fully WEBENCH® Enabled
  • LM22672-Q1 is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
    Junction Temperature)
  • SO PowerPAD (Exposed Pad)

The LM22672 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 1 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5 V output and adjustable output voltage options are available.

The default switching frequency is set at 500 kHz allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22672 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22672 is a member of Texas Instruments’ SIMPLE SWITCHER® family. The SIMPLE SWITCHER® concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH® design tool. TI's WEBENCH® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.

The LM22672 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 1 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5 V output and adjustable output voltage options are available.

The default switching frequency is set at 500 kHz allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22672 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22672 is a member of Texas Instruments’ SIMPLE SWITCHER® family. The SIMPLE SWITCHER® concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH® design tool. TI's WEBENCH® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.
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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM22672/-Q1 42-V, 1-A SIMPLE SWITCHER® Step-Down Voltage Regulator with Features datasheet (Rev. M) PDF | HTML 05 Nov 2014
Application note SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. B) PDF | HTML 09 Okt 2024
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mär 2024
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12 Sep 2014
Application note AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B) 06 Mai 2013
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 06 Mai 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
EVM User's guide AN-1896 LM22672 Evaluation Board (Rev. D) 23 Apr 2013
Application note AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Design guide SIMPLE SWITCHER® Design Guide 11 Apr 2011
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 Mai 2004

Design und Entwicklung

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Evaluierungsplatine

LM22672EVAL — LM22672 1 A, SIMPLE SWITCHER-Regler mit Frequenzanpassung oder Synchronisation und Präzisionsfreigab

The LM22672 evaluation board is designed to demonstrate the capabilities of the LM22672 switching regulator. The LM22672 evaluation board is configured to provide an output voltage of 3.3V up to 1A load current with an input voltage range of 4.5V to 42V. Due to the low RDS(ON) of the integrated (...)

Benutzerhandbuch: PDF
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Simulationsmodell

LM22672-Q1-ADJ PSpice Transient Model

SNVM327.ZIP (110 KB) - PSpice Model
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Simulationsmodell

LM22672-Q1-ADJ Unencrypted PSpice Transient Model

SNVM924.ZIP (4 KB) - PSpice Model
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Berechnungstool

LM2267X-22680DESIGN-CALC — LM2267x, LM22680 Schnellstart-Simple Switcher-Komponentenrechner

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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
HSOIC (DDA) 8 Ultra Librarian
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  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
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  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
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