UC2577-ADJ Status: ACTIVE

Simple Step-Up Voltage Regulator

      
         
Alert me about changes<br/>to this product


Datasheet

Download - PDF Icon

 UC2577-ADJ
Iout(Max)(A)3  
Iq(Typ)(mA)45  
Vin(Min)(V)3  
Vin(Max)(V)40  
Vout(Min)(V)5  
Vout(Max)(V)60  
Switching Frequency(Max)(kHz)52  
Regulated Outputs(#)1  
Duty Cycle(Max)(%)100  
Operating Temp Range(Celsius)-40 to 125,-40 to 85  
Pin/Package5DDPAK/TO-263, 5TO-220  
TopologyBoost  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • TPS61175: 3-A High Voltage Boost Converter with Soft-start and Programmable Switching Frequency
  • TPS61087: 18.5V, 3.2A, 650kHz, 1.2MHz Step-Up DC-DC Converter
  • TPS61170: 1.2A Switch, High Voltage Boost Converter in 2x2mm QFN Package
  • TL3577: 100-kHz Current-Mode Simple Step-Up/Flyback Switching Regulator
  • TPS40210: Wide Input Range Current Mode Boost Controller
  • MC34063A: 1.5-A Boost/Buck/Inverting Switching Regulator

More Related Products

Product Information

Features

  • Requires Few External Components
  • NPN Output Switches 3.0A, 65V(max)
  • Extended Input Voltage Range: 3.0V to 40V
  • Current Mode Operation for Improved Transient Response, Line Regulation, and Current Limiting
  • Soft Start Function Provides Controlled Startup
  • 52kHz Internal Oscillator
  • Output Switch Protected by Current Limit, Undervoltage Lockout and Thermal Shutdown
  • Improved Replacement for LM2577-ADJ Series
  • TYPICAL APPLICATIONS
    • Simple Boost and Flyback Converters
    • SEPIC Topology Permits Input Voltage to be Higher or Lower than Output Voltage
    • Transformer Coupled Forward Regulators
    • Multiple Output Designs

Description

The UC2577-ADJ device provides all the active functions necessary to implement step-up (boost), flyback, and forward converter switching regulators. Requiring only a few components, these simple regulators efficiently provide up to 60V as a step-up regulator, and even higher voltages as a flyback or forward converter regulator.

The UC2577-ADJ features a wide input voltage range of 3.0V to 40V and an adjustable output voltage. An on-chip 3.0A NPN switch is included with undervoltage lockout, thermal protection circuitry, and current limiting, as well as soft start mode operation to reduce current during startup. Other features include a 52kHz fixed frequency on-chip oscillator with no external components and current mode control for better line and load regulation.

A standard series of inductors and capacitors are available from several manufacturers optimized for use with these regulators and are listed in this data sheet.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Replaced ByPrice | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC2577T-ADJACTIVE-40 to 125 8.95 | 1kuTO-220 (KC) | 5 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2577T-ADJG3ACTIVE-40 to 125 8.95 | 1kuTO-220 (KC) | 5 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2577TD-ADJOBSOLETE-40 to 125UC2577TDKTTT-ADJ DDPAK/TO-263 (KTT) | 5 View   Download CAD Format for this Symbol Replaced by UC2577TDKTTT-ADJ
UC2577TDKTTT-ADJACTIVE-40 to 85 8.15 | 1kuDDPAK/TO-263 (KTT) | 5 View 50 | SMALL T&R Download CAD Format for this Symbol 
UC2577TDKTTT-ADJG3ACTIVE-40 to 85 8.15 | 1kuDDPAK/TO-263 (KTT) | 5 View 50 | SMALL T&R Download CAD Format for this Symbol 
UC2577TDTR-ADJACTIVE-40 to 125 8.15 | 1kuDDPAK/TO-263 (KTT) | 5 View 500 | LARGE T&R Download CAD Format for this Symbol Purchase Samples
UC2577TDTR-ADJG3ACTIVE-40 to 125 8.15 | 1kuDDPAK/TO-263 (KTT) | 5 View 500 | LARGE T&R Download CAD Format for this Symbol Purchase Samples

* 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

  TI Inventory Status Reported Distributor Inventory
UC2577T-ADJAs of 8:11 AM GMT, 03 Jul 2009As of 8:11 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasArrow 545
 DigiKey 271
 Mouser Electronics 50
 Newark 50
 Rochester Electronics >1k
 EuropeArrow Northern Europe 25
UC2577T-ADJG3As of 8:11 AM GMT, 03 Jul 2009As of 8:11 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasDigiKey  Available
 Mouser Electronics 37
UC2577TDKTTT-ADJAs of 8:11 AM GMT, 03 Jul 2009As of 8:11 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasDigiKey 223
 Mouser Electronics 3
 Newark 143
 Rochester Electronics 950
UC2577TDKTTT-ADJG3As of 8:11 AM GMT, 03 Jul 2009As of 8:11 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasDigiKey  Available
UC2577TDTR-ADJAs of 8:11 AM GMT, 03 Jul 2009As of 8:11 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 8 Weeks AmericasRochester Electronics >1k
UC2577TDTR-ADJG3As of 8:11 AM GMT, 03 Jul 2009As of 8:11 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 8 WeeksNone Reported
View Distributors
   
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
UC2577T-ADJ RoHS Compliant Green (RoHS & no Sb/Br) CU SN N/A for Pkg TypeViewView
UC2577T-ADJG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN N/A for Pkg TypeViewView
UC2577TDKTTT-ADJ RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC2577TDKTTT-ADJG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC2577TDTR-ADJ RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC2577TDTR-ADJG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView

* 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 UC2577-ADJ Help

Datasheet

Application Notes

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
TPS61175 3-A High Voltage Boost Converter with Soft-start and Programmable Switching Frequency   TI customers also evaluated this product.
TPS61087 18.5V, 3.2A, 650kHz, 1.2MHz Step-Up DC-DC Converter   TI customers also evaluated this product.
TPS61170 1.2A Switch, High Voltage Boost Converter in 2x2mm QFN Package   TI customers also evaluated this product.
TL499A Wide-Range Power-Supply Controller   TI customers also evaluated this product.
TPS61085 18.5V, 2A, 650kHz, 1.2MHz Step-Up DC-DC Converter   TI customers also evaluated this product.
TL3577 100-kHz Current-Mode Simple Step-Up/Flyback Switching Regulator DC/DC CONVERTERS (INTEGRATED SWITCH)-BUCK-BOOST REGULATORS TI customers also evaluated this product.
TPS40210 Wide Input Range Current Mode Boost Controller NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) 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.
MC33063A 1.5-A Peak 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.
TPS5450 5.5V to 36V, 5A, 500kHz Step Down SWIFT™ Converter DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
UC3611 Quad Schottky Diode Array POWER MANAGEMENT SPECIAL FUNCTIONS-SCHOTTKY DIODE ARRAYS TI customers also evaluated this product.
UCC27322 Single 9-A High Speed Low-Side MOSFET Driver With Enable AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS TI customers also evaluated this product.
UA7805 3 Pin 1.5A Fixed 5V Positive Voltage Regulator LINEAR REGULATORS-STANDARD VOLTAGE REGULATORS TI customers also evaluated this product.
PTN78020W 6-A Wide-Input Voltage Adjustable Switching Regulator PLUG-IN POWER MODULES-NON-ISOLATED POL TI customers also evaluated this product.

Related End Equipments

All End-Equipment

Support and Community

Customer Tags Help

Most Popular Tags for UC2577-ADJ:

View All Tags

Other Support



Click 

Here