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LM2575 Status: ACTIVE

1-A Simple Step-Down Adjustable Voltage Switching Regulator with Output Enable


      
         
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Datasheet

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 LM2575
Iout(Max)(A)1  
Vin(Min)(V)4.75  
Vin(Max)(V)40  
Vout(Min)(V)1.23  
Vout(Max)(V)37  
Preset Vout(V)1.23  
Iq(Typ)(mA)5  
Switching Frequency(Typ)(kHz)52  
Switch Current Limit(Typ)(A)3.2  
TopologyBuck  
Operating Temp Range(Celsius)-40 to 125  
Pin/Package16PDIP  
RatingCatalog  
Duty Cycle(Max)(%)98  
Regulated Outputs(#)1  
Thermal ShutdownYes  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • TL2575-05: 1-A Simple Step-Down Switching Voltage Regulators
  • MC34063A: 1.5-A Boost/Buck/Inverting Switching Regulator
  • LM317: 3/4 Pin 1.5A Adjustable Positive Voltage Regulator

Product Information

Features

  • 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 (Typ) Fixed-Frequency Internal Oscillator
  • TTL Shutdown Capability With 50-µA (Typ) Standby Current
  • High Efficiency. . .as High as 88% (Typ)
  • 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 Datasheet
  • APPLICATIONS
    • Simple High-Efficiency Step-Down (Buck) Regulator
    • Pre-Regulator for Linear Regulators
    • On-Card Switching Regulators
    • Positive-to-Negative Converter (Buck-Boost)

DESCRIPTION/ORDERING INFORMATION

The LM2575 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 via 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.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
LM2575INACTIVE-40 to 1251.35 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
LM2575INE4ACTIVE-40 to 1251.35 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:54 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 18 WeeksLM2575IN
AmericasNewark 369
Rochester Electronics 355
AsiaFarnell Asia 369
WorldwideMouser Electronics 9
TI Lead Time*: 18 WeeksLM2575INE4
WorldwideMouser Electronics 417
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
LM2575IN RoHS Compliant Pb-Free (RoHS) CU NIPD N/A for Pkg TypeViewView
LM2575INE4 RoHS Compliant Pb-Free (RoHS) CU NIPD N/A for Pkg TypeViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for LM2575 Help

Datasheet

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
TL2575-05 1-A Simple Step-Down Switching Voltage Regulators DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
MC34063A 1.5-A Boost/Buck/Inverting Switching Regulator DC/DC CONVERTERS (INTEGRATED SWITCH)-INVERTING REGULATORS TI customers also evaluated this product.
LM317 3/4 Pin 1.5A Adjustable Positive Voltage Regulator LINEAR REGULATORS-STANDARD VOLTAGE REGULATORS TI customers also evaluated this product.

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