Startseite Energiemanagement AC/DC & DC/DC converters (integrated FET)
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AC/DC & DC/DC converters (integrated FET)

LM2575

AKTIV

1-A-Simple-Abwärtsspannungsregler mit einstellbarer Spannungsumschaltung und Ausgangsfreigabe

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TPSM33615 AKTIV 1,5-A-Synchron-Abwärtsstrommodul, 3 bis 36 V Eingang, 1 bis 15 V Ausgang Newer Module version with better performance

LM2575

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Produktdetails

Iout (max) (A) 1 Vin (min) (V) 4.75 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 47 Switching frequency (max) (kHz) 58 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.23 Vout (max) (V) 37 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.005
Iout (max) (A) 1 Vin (min) (V) 4.75 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 47 Switching frequency (max) (kHz) 58 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.23 Vout (max) (V) 37 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.005
PDIP (N) 16 181.42 mm² 19.3 x 9.4
  • Adjustable With a Range of 1.23 V to 37 V and
    ±4% Regulation (Max) Over Line, Load, and
    Temperature Conditions
  • Specified 1-A Output Current
  • Wide Input Voltage Range 4.75 V to 40 V
  • Uses Readily Available Standard Inductors
  • 52-kHz (Typical) Fixed-Frequency Internal
    Oscillator
  • TTL Shutdown Capability With 50-µA (Typical)
    Standby Current
  • High Efficiency…as High as 88% (Typical)
  • Thermal Shutdown and Current-Limit Protection
    With Cycle-by-Cycle Current Limiting
  • For the Full Offering of Voltages (Including Fixed-
    Output Options) and Packages (Including TO-
    263), See TL2575 Data Sheet, SLVS638
  • Adjustable With a Range of 1.23 V to 37 V and
    ±4% Regulation (Max) Over Line, Load, and
    Temperature Conditions
  • Specified 1-A Output Current
  • Wide Input Voltage Range 4.75 V to 40 V
  • Uses Readily Available Standard Inductors
  • 52-kHz (Typical) Fixed-Frequency Internal
    Oscillator
  • TTL Shutdown Capability With 50-µA (Typical)
    Standby Current
  • High Efficiency…as High as 88% (Typical)
  • Thermal Shutdown and Current-Limit Protection
    With Cycle-by-Cycle Current Limiting
  • For the Full Offering of Voltages (Including Fixed-
    Output Options) and Packages (Including TO-
    263), See TL2575 Data Sheet, SLVS638

The LM2575 device greatly simplifies the design of switching power supplies by conveniently providing all the active functions needed for a step-down (buck) switching regulator in an integrated circuit. Accepting a wide input voltage range and available in an adjustable output version, the LM2575 has an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation. The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown. In addition, a manual shutdown is available through an external ON/OFF pin.

The LM2575 represents a superior alternative to popular three-terminal linear regulators. Due to its high efficiency, it significantly reduces the size of the heat sink and, in many cases, no heat sink is required. Optimized for use with standard series of inductors available from several different manufacturers, the LM2575 greatly simplifies the design of switch-mode power supplies by requiring a minimal addition of only four to six external components for operation.

The LM2575 is characterized for operation over the virtual junction temperature range of –40°C to 125°C.

The LM2575 device greatly simplifies the design of switching power supplies by conveniently providing all the active functions needed for a step-down (buck) switching regulator in an integrated circuit. Accepting a wide input voltage range and available in an adjustable output version, the LM2575 has an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation. The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown. In addition, a manual shutdown is available through an external ON/OFF pin.

The LM2575 represents a superior alternative to popular three-terminal linear regulators. Due to its high efficiency, it significantly reduces the size of the heat sink and, in many cases, no heat sink is required. Optimized for use with standard series of inductors available from several different manufacturers, the LM2575 greatly simplifies the design of switch-mode power supplies by requiring a minimal addition of only four to six external components for operation.

The LM2575 is characterized for operation over the virtual junction temperature range of –40°C to 125°C.
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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM2575 1-A Simple Step-Down Switching Voltage Regulator datasheet (Rev. F) PDF | HTML 31 Aug 2015
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mär 2024
Technical article How to increase system reliability and simplify design using DC/DC converters PDF | HTML 13 Jun 2016
Technical article The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 19 Apr 2016
Technical article Advantages of leaded packages in robust industrial designs PDF | HTML 08 Mär 2016
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-1229 SIMPLE SWITCHER PCB Layout Guidelines (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
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note AN-776 20-W SIMPLE SWITCHER Forward Converter (Rev. A) 23 Apr 2013
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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Support-Software

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