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TPS40021 Status: ACTIVE

Enhanced Low Input (2.25V-5.5V) up to 1MHz Frequency, Sync. Buck Controller, source/sink


      
         
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 TPS40020 TPS40021
TopologyBuck  Buck  
Vin(Min)(V)2.25  2.25  
Vin(Max)(V)5.5  5.5  
Vout(Min)(V)0.7  0.7  
Vout(Max)(V)4  4  
Regulated Outputs(#)1  1  
Iout(Max)(A)25  25  
Switching Frequency(Max)(kHz)1000  1000  
Iq(Typ)(mA)1.5  1.5  
Pin/Package16HTSSOP  16HTSSOP  
Thermal ShutdownYes  Yes  
RatingCatalog  Catalog  
Duty Cycle(Max)(%)85  85  
 SamplesSamples
 InventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • TPS40057: Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias
  • TPS40007: Low Input (2.25V-5.5V) 300 kHz Frequency, Synchronous Buck Controller, Source/ Sink, Prebias Operati
  • TPS54160: 3.5V to 60V, 1.5A Step Down SWIFT™ Converter with Eco-Mode™

Product Information

Features

  • Operating Input Voltage 2.25 V to 5.5 V
  • Output Voltage as Low as 0.7 V
  • 1% Internal 0.7 V Reference
  • Predictive Gate Drive™ N-Channel MOSFET Drivers for Higher Efficiency
  • Externally Adjustable Soft-Start and Short Circuit Current Limit
  • Programmable Fixed-Frequency 100 kHz-to-1 MHz Voltage-Mode Control
  • Source-Only Current or Source/Sink Current
  • Quick Response Output Transient Comparators with Power Good Indication Provide Output Status
  • 16-Pin PowerPAD™ Package
  • APPLICATIONS
    • Networking Equipment
    • Telecom Equipment
    • Base Stations
    • Servers
    • DSP Power

PowerPAD and Predictive Gate Drive are trademarks of Texas Instruments.

Description

The TPS4002x family of dc-to-dc controllers are designed for non-isolated synchronous buck regulators, providing enhanced operation and design flexability through user programmability.

The TPS4002x utilizes a proprietary Predictive Gate Drive™ technology to minimize the diode conduction losses associated with the high-side and synchronous rectifier N-channel MOSFET transistions. The integrated charge pump with boost circuit provides a regulated 5-V gate drive for both the high side and synchronous rectifier N-channel MOSFETs. The use of the Predictive Gate Drive™ technology and charge pump/boost circuits combine to provide a highly efficient, smaller and less expensive converter.

Design flexibility is provided through user programmability of such functions as: operating frequency, short circuit current detection thresholds, soft-start ramp time, and external synchronization frequency. The operating frequency is programmable using a single resistor over a frequency range of 100 kHz to 1 MHz. Higher operating frequencies yield smaller component values for a given converter power level as well as faster loop closure.

The short circuit current detection is programmable through a single resistor, allowing the short circuit current limit detection threshold to be easily tailored to accommodate different size (RDS(on)) MOSFETs. The short circuit current function provides pulse-by-pulse current limiting during soft-start and short term transient conditions as well as a fault counter to handle longer duration short circuit current conditions. If a fault is detected the controller shuts down for a period of time determined by six (6) consecutive soft-start cycles. The controller automatically retries the output every seventh (7th) soft-start cycle.

In addition to determining the off time during a fault condition, the soft-start ramp provides a closed loop controlled ramp of the converter output during startup. Programmability allows the ramp rate to be adjusted for a wide variety of output L-C component values.

The output voltage transient comparators provide a quick response, first strike, approach to output voltage transients. The output voltage is sensed through a resistor divider at the OSNS pin. If an overvoltage condition is detected the HDRV gate drive is shut-off and the LDRV gate drive is turned on until the output is returned to regulation. Similarly, if an output undervoltage condition is sensed the HDRV gate drive goes to 95% duty cycle to pump the output back up quickly. In either case, the PowerGood open drain output pulls low to indicate an output voltage out of regulation condition. The PowerGood output can be daisy-chained to the SS/SD pin or enable pin of other controllers or converters. The transient comparators can be disabled by simply tying the OSNS pin to VDD.

The TPS4002X can be externally synchronized through the ILIM/SYNC pin up to 1.5× the free-running frequency. This allows multiple contollers to be synchronized to eliminate EMI concerns due to input beat frequencies between controllers.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsSamples
TPS40021PWPACTIVE-40 to 851.30 | 1kuHTSSOP (PWP) | 16 View 90 | TUBE Download CAD Format for this Symbol
TPS40021PWPG4ACTIVE-40 to 851.30 | 1kuHTSSOP (PWP) | 16 View 90 | TUBE Download CAD Format for this Symbol
TPS40021PWPRACTIVE-40 to 851.15 | 1kuHTSSOP (PWP) | 16 View 2000 | LARGE T&R Download CAD Format for this SymbolPurchase Samples
TPS40021PWPRG4ACTIVE-40 to 851.15 | 1kuHTSSOP (PWP) | 16 View 2000 | LARGE T&R Download CAD Format for this SymbolPurchase 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 10:09 AM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksTPS40021PWP
AsiaWPI 79
TI Lead Time*: 20 WeeksTPS40021PWPG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksTPS40021PWPR
None Reported
View Distributors
TI Lead Time*: 20 WeeksTPS40021PWPRG4
None Reported
View Distributors
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** 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
TPS40021PWP RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS40021PWPG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS40021PWPR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS40021PWPRG4 RoHS Compliant 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

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Datasheet

User Guides

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Reference Designs

Description Part # Company
Power Management Solution for Virtex(TM)-II (Design 4) PR270 Texas Instruments
Power Management Solution for Virtex-II Pro (Design 4) PR271 Texas Instruments

Tools & Software


*Required

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Enter your design parameters below to design now with SwitcherPro™

 Input
      Min       Max
* Vin Min:   2.25 V     5.5 V
* Vin Max:   2.25 V     5.5 V
 Output
      Min       Max
* Vout:   0.7 V     4 V
* Iout Max:   0.0 A     25 A
 

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NamePart # Company Tool / Software Type
TPS40021 5V Input 1.5V Output, 20A Evaluation ModuleTPS40021EVM-001Texas InstrumentsDevelopment Boards/EVMs
SwitcherPro(TM) Online and Desktop Design Creator and Management SoftwareSWITCHERPRO Texas Instruments Application Software 

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
TPS40057 Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS40007 Low Input (2.25V-5.5V) 300 kHz Frequency, Synchronous Buck Controller, Source/ Sink, Prebias Operati NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS54160 3.5V to 60V, 1.5A Step Down SWIFT™ Converter with Eco-Mode™ DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.

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