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UC3525A Status: ACTIVE

Regulating Pulse Width Modulators


      
         
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Datasheet

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 UC1525A UC2525A UC3525A
TopologyBoost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull  Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull  Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull  
Control MethodVoltage Mode  Voltage Mode  Voltage Mode  
Duty Cycle(Max)(%)50  50  50  
PWM Outputs(#)2  2  2  
Frequency(Max)(kHz)450  450  450  
UVLO Thresholds On/Off(V)7/6.8  7/6.8  7/6.8  
Pin/Package16CDIP, 20LCCC  16PDIP, 16SOIC  16PDIP, 16SOIC, 20PLCC  
Regulated Outputs(#)2  2  2  
 SamplesSamplesSamples
 InventoryInventoryInventory

Other qualified versions of UC3525A

Version Part Number Definition
Catalog UC3525AM TI's standard catalog product
Military UC1525A QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

  • UC3525B: Regulating Pulse Width Modulators
  • TL494: PWM Control Circuit
  • SG3524: Regulating Pulse-Width Modulators

Product Information

Features

  • 8-V to 35-V Operation
  • 5.1-V Reference Trimmed to ±1%
  • 100-Hz to 500-kHz Oscillator Range
  • Separate Oscillator Sync Terminal
  • Adjustable Deadtime Control
  • Internal Soft-Start
  • Pulse-by-Pulse Shutdown
  • Input Undervoltage Lockout With Hysteresis
  • Latching PWM to Prevent Multiple Pulses
  • Dual Source/Sink Output Drivers

Description

The UC1525A/1527A series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip +5.1-V reference is trimmed to ±1% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provides a wide range of dead-time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC3525ADWACTIVE0 to 701.15 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525ADWG4ACTIVE0 to 701.15 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525ADWTRACTIVE0 to 701.15 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3525ADWTRG4ACTIVE0 to 701.15 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3525ANACTIVE0 to 701.15 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525ANG4ACTIVE0 to 701.15 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525AQACTIVE0 to 701.40 | 1kuPLCC (FN) | 20 View 46 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525AQG3ACTIVE0 to 701.40 | 1kuPLCC (FN) | 20 View 46 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525AQTRACTIVE0 to 701.15 | 1kuPLCC (FN) | 20 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3525AQTRG3ACTIVE0 to 701.15 | 1kuPLCC (FN) | 20 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase 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

Reported Distributor Inventory as of 9:44 AM GMT, 06 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC3525ADW
AmericasNewark 347
Rochester Electronics 38
AsiaFarnell Asia 626
WPI 64
EuropeEBV Elektronik 4
Spoerle 40
WorldwideDigiKey >1k
TI Lead Time*: 20 WeeksUC3525ADWG4
AmericasRochester Electronics 800
AsiaFarnell Asia 459
EuropeEBV Elektronik 400
Farnell 384
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC3525ADWTR
AmericasRochester Electronics >1k
EuropeEBV Elektronik 48
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC3525ADWTRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC3525AN
AmericasArrow >1k
Avnet 251
Newark >1k
Rochester Electronics >1k
AsiaWPI 250
EuropeAbacus Polar 150
Arrow Northern Europe 575
Arrow Southern Europe 250
EBV Elektronik 12
Spoerle 125
WorldwideMouser Electronics 70
TI Lead Time*: 20 WeeksUC3525ANG4
AsiaFarnell Asia 536
EuropeEBV Elektronik >1k
Farnell 298
TI Lead Time*: 4 WeeksUC3525AQ
AmericasRochester Electronics >1k
WorldwideDigiKey 101
TI Lead Time*: 4 WeeksUC3525AQG3
AmericasAvnet 90
WorldwideDigiKey  Available
TI Lead Time*: 10 WeeksUC3525AQTR
AmericasRochester Electronics 1k
WorldwideDigiKey  Available
TI Lead Time*: 10 WeeksUC3525AQTRG3
WorldwideDigiKey  Available
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
UC3525ADW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525ADWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525ADWTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525ADWTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525AN RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC3525ANG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC3525AQ RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC3525AQG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC3525AQTR RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC3525AQTRG3 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 UC3525A Help

Datasheet

Application Notes

View Application Notes for PWM Power Supply Controllers

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UC3525B Regulating Pulse Width Modulators AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TL494 PWM Control Circuit AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
SG3524 Regulating Pulse-Width Modulators AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.

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