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TPS40042 Status: ACTIVE

Low Pin Count, Low Vin, Synchronous Buck DCDC Controller with Tracking


      
         
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 TPS40040 TPS40041 TPS40042
TopologyBuck  Buck  Buck  
Vin(Min)(V)2.25  2.25  3.0  
Vin(Max)(V)5.5  5.5  5.5  
Vout(Min)(V)0.6  0.6  0.6  
Vout(Max)(V)4.95  4.84  4.95  
Regulated Outputs(#)1  1  1  
Iout(Max)(A)15  15  15  
Switching Frequency(Max)(kHz)300  600  600  
Iq(Typ)(mA)2  2  2  
Pin/Package8SON  8SON  10SON  
Thermal ShutdownYes  Yes  Yes  
RatingCatalog  Catalog  Catalog  
Duty Cycle(Max)(%)90  88  90  
 SamplesSamplesSamples
 InventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • TPS40131: Two-Phase Synchronous Buck Controller w/Integrated Mosfet Drivers
  • TPS40057: Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias
  • TPS40192: 4.5V to 18V Input, Low Pin Count, Synchronous Buck Controller with Power Good
  • TPS51315: 3V to 14V, 10A Synchronous Step Down Converter with D-CAP™ Mode
  • TPS63000: 96% Buck-Boost Converter with 1.8A Current Switches in 3x3 QFN
  • TPS65146: Compact LCD Bias IC for Notebook & Monitor with LDO, VCOM Buffer and Reset IC

More Related Products

Product Information

Features

  • 3.0-V to 5.5-V Input
  • External Reference required: 0.5 V to 1.5 V
  • Output Voltage from REFIN to 90% of VIN
  • High-Side Drive for N-Channel FET
  • Supports Pre-Biased Outputs
  • Adaptive Anti-Cross Conduction Gate Drive
  • Fixed switching frequency (600 kHz) Voltage Mode Control
  • Three Selectable Short Circuit Protection Levels
  • Hiccup Restart from Faults
  • Active Low Enable
  • Thermal Shutdown Protection at 145°C
  • 10-Pin, 3-mm x 3-mm SON (DRC)
  • APPLICATIONS
    • DDR Memory
    • Point of Load
    • Telecommunications
    • DC to DC Modules

Predictive Gate Drive Is a trademark of Texas Instruments.

Description

The TPS40042 DC/DC controller is designed to operate with an input source between a 3.0 V and 5.5 V. To reduce the number of external components, a number of operating parameters are fixed internally. The operating frequency for example, is internally set at 600 kHz.

One of three short circuit threshold levels may be selected by the addition of an external resistor from the COMP pin to circuit ground (no resistor is the default setting). During power on, and before the internal soft start commands the output voltage to rise, the TPS40042 enters a calibration cycle, measures the current out of the COMP pin, and selects an internal SCP threshold voltage. At the end of the 1.5-ms calibration time, the output voltage is allowed to enter soft-start. During operation, the selected SCP threshold voltage is compared to the upper MOSFET’s voltage drop during its ON time to determine whether there is an overload condition. If the voltage across the MOSFET exceeds the threshold voltage, the TPS40042 counts seven continuous pulses before shutting completely OFF for seven soft start charge/discharge cycles, after which, the TPS40042 attempts to restart the output.

During startup, both the high-side MOSFET switch and the synchronous rectifier are held in the OFF state until the internal soft start commands an output voltage higher than the voltage currently at the output. This may happen when the output is pre-biased at some voltage greater than zero and less than the desired regulation voltage. When the internal soft start first commands the output to rise, the pulse width of the synchronous rectifier is slowly increased from zero to the full 1-D conduction time by a number of discrete steps. In this way, inductor current is not allowed to reverse quickly, and ensures a monotonic startup of the output whether the output starts from zero or from a pre-bias level. If power is applied to the device while the EN (enable low) pin is allowed to float high, the TPS40042 remains OFF. Only when the EN pin is pulled down towards ground is the controller allowed to start.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsSamples
TPS40042DRCRACTIVE-40 to 850.90 | 1kuSON (DRC) | 10 View 3000 | LARGE T&R Download CAD Format for this SymbolPurchase Samples
TPS40042DRCRG4ACTIVE-40 to 850.90 | 1kuSON (DRC) | 10 View 3000 | LARGE T&R Purchase Samples
TPS40042DRCTACTIVE-40 to 850.99 | 1kuSON (DRC) | 10 View 250 | SMALL T&R Download CAD Format for this Symbol
TPS40042DRCTG4ACTIVE-40 to 850.99 | 1kuSON (DRC) | 10 View 250 | SMALL T&R 

* 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*: 4 WeeksTPS40042DRCR
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksTPS40042DRCRG4
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksTPS40042DRCT
AmericasNewark 50
Rochester Electronics 500
WorldwideDigiKey 309
Mouser Electronics 139
TI Lead Time*: 4 WeeksTPS40042DRCTG4
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
TPS40042DRCR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS40042DRCRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS40042DRCT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS40042DRCTG4 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

Most useful technical documents for TPS40042 Help

Datasheet

Tools & Software


*Required

Design Now with SwitcherPro™

Enter your design parameters below to design now with SwitcherPro™

 Input
      Min       Max
* Vin Min:   3.0 V     5.5 V
* Vin Max:   3.0 V     5.5 V
 Output
      Min       Max
* Vout:   0.6 V     4.95 V
* Iout Max:   0.0 A     15 A
 

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NamePart #CompanySoftware/Tool Type
SwitcherPro(TM) Online and Desktop Design Creator and Management SoftwareSWITCHERPRO Texas Instruments Application Software 

Simulation Models

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
TPS40131 Two-Phase Synchronous Buck Controller w/Integrated Mosfet Drivers NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
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.
TPS40192 4.5V to 18V Input, Low Pin Count, Synchronous Buck Controller with Power Good NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS51217 3V to 28V Input. 20A Synchronous Step Down Controller with DCAP™ Mode, 340kHz for Notebook Power NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS40211 Wide Input Range Current Mode Boost Controller NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS40041 Low Pin Count, Low Vin Synchronous Buck DC/DC Controller NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS40077 High Efficiency, Mid-Range Input, Synchronous Buck Controller with Voltage Feed Forward NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
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TPS40140 Stackable 2 Channel Multiphase or 2 Channel Independent Output Controller NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
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