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UCC39421 Status: NRND

High Frequency, Multimode Synchronous Controller


      
         
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Alert Icon   NRND: This product is not recommended for new designs. However, the device, tool, or software continues to be in production to support existing customers. TI does not recommend using this part in a new design. TI encourages designers to consider alternative products for new designs.

Replaced By:

  • TPS61030 The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

Datasheet

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Product Information

Features

  • Operation Down to an Input Voltage of 1.8 V
  • High Efficiency Boost, SEPIC or Flyback (Buck-Boost) Topologies
  • Drives External FETs for High-Current Applications
  • Up to 2-MHz Oscillator
  • Synchronizable Fixed Frequency Operation
  • High-Efficiency Low-Power Mode
  • High-Efficiency at Very Low-Power with Programmable Variable Frequency Mode
  • Pulse-by-Pulse Current Limit
  • 5-µA Supply Current in Shutdown
  • 150-µA Supply Current in Sleep Mode
  • Selectable NMOS or PMOS Rectification
  • Built-In Power-On Reset (UCC39422 Only)
  • Built-In Low-Voltage Detect (UCC39422 Only)

Description

The UCC39421 family of synchronous PWM controllers is optimized to operate from dual alkaline/NiCd cells or a single Lithium-Ion (Li-Ion) cell, and convert to adjustable output voltages from 2.5 V to 8 V. For applications where the input voltage does not exceed the output, a standard boost configuration is used.

For other applications where the input voltage can swing above and below the output, a 1:1 coupled inductor (Flyback or SEPIC) is used in place of the single inductor. Fixed frequency operation can be programmed, or synchronized to an external clock source. In applications where (at light loads) variable frequency mode is acceptable, the IC can be programmed to automatically enter PFM (pulse frequency modulation) mode for an additional efficiency benefit.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UCC39421NNRND0 to 703.45 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
UCC39421NG4NRND0 to 703.45 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
UCC39421PWNRND0 to 703.45 | 1kuTSSOP (PW) | 16 View 90 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
UCC39421PWG4NRND0 to 703.45 | 1kuTSSOP (PW) | 16 View 90 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
UCC39421PWTRNRND0 to 703.45 | 1kuTSSOP (PW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
UCC39421PWTRG4NRND0 to 703.45 | 1kuTSSOP (PW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available

* 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 9:48 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 14 WeeksUCC39421N
AmericasRochester Electronics >1k
TI Lead Time*: 14 WeeksUCC39421NG4
EuropeEBV Elektronik 50
TI Lead Time*: 20 WeeksUCC39421PW
AmericasArrow 70
Newark 156
Rochester Electronics 672
AsiaFarnell Asia 156
WPI 180
WorldwideDigiKey 270
TI Lead Time*: 20 WeeksUCC39421PWG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC39421PWTR
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC39421PWTRG4
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
UCC39421N  Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UCC39421NG4  Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UCC39421PW  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC39421PWG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC39421PWTR  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC39421PWTRG4  Green (RoHS & no Sb/Br) CU NIPDAU 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 UCC39421 Help

Datasheet

Application Notes

View Application Notes for DC/DC Controllers (External Switch)

More Literature

Reference Designs

Description Part # Company
LDO, Buck/Boost, 2 Sync Buck, Sync Boost Reference Design PR038 Texas Instruments
SEPIC, Negative Flyback, Two Sync. Buck with Vin 3.3 V and Vout 5 V, 3.3 V, 1.8 V and -5 V PMP01-006-1217 Texas Instruments

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