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UC3525B Status: ACTIVE

Regulating Pulse Width Modulators


      
         
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Datasheet

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 UC1525B UC2525B UC3525B
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  16SOIC  16PDIP, 16SOIC  
Regulated Outputs(#)2  2  2  
 SamplesSamplesSamples
 InventoryInventoryInventory

Other qualified versions of UC3525B

Version Part Number Definition
Military UC1525B QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

  • UC3525A: Regulating Pulse Width Modulators
  • TL494: PWM Control Circuit
  • UC3825: High Speed PWM Controller
  • TPS73633: Single Output LDO, 400-mA, Fixed (3.3 V), Cap-Free, Low-Noise, Reverse Current Protection
  • REF02: +5V Precision Voltage Reference
  • TPS62040: Adjustable, 1.2-A, 95% Efficient Step-Down Converter, 18uA, MSOP-10

Product Information

Features

  • 8 to 35V Operation
  • 5.1V Buried Zener Reference Trimmed to ±0.75%
  • 100Hz to 500kHz 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
  • Low Cross Conduction Output Stage
  • Tighter Reference Specifications

Description

The UC1525B/1527B 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 +5.1V buried zener reference is trimmed to ±0.75% 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 provide a wide range of dead time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC3525BDWACTIVE0 to 702.45 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525BDWG4ACTIVE0 to 702.45 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525BDWTRACTIVE0 to 702.35 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3525BDWTRG4ACTIVE0 to 702.35 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3525BNACTIVE0 to 702.45 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3525BNG4ACTIVE0 to 702.45 | 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 9:53 AM GMT, 25 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC3525BDW
AmericasAvnet 195
Rochester Electronics 478
AsiaFarnell Asia 93
WPI 24
EuropeFarnell 93
WorldwideDigiKey 446
Mouser Electronics 73
TI Lead Time*: 20 WeeksUC3525BDWG4
EuropeEBV Elektronik 40
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC3525BDWTR
AmericasRochester Electronics >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC3525BDWTRG4
WorldwideDigiKey  Available
TI Lead Time*: 14 WeeksUC3525BN
AmericasArrow 150
EuropeSpoerle 20
WorldwideDigiKey 133
TI Lead Time*: 14 WeeksUC3525BNG4
EuropeEBV Elektronik 50
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
UC3525BDW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525BDWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525BDWTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525BDWTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3525BN RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC3525BNG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU 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

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Datasheet

Application Notes

View Application Notes for PWM Power Supply Controllers

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UC3525A 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.
UC3825 High Speed PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TPS73633 Single Output LDO, 400-mA, Fixed (3.3 V), Cap-Free, Low-Noise, Reverse Current Protection LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
REF02 +5V Precision Voltage Reference VOLTAGE REFERENCE-SERIES VOLTAGE REFERENCE TI customers also evaluated this product.
TPS62040 Adjustable, 1.2-A, 95% Efficient Step-Down Converter, 18uA, MSOP-10 DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.

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