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TPS51120 Status: ACTIVE

Dual Current Mode, Synch Step-Down Controller With 100-mA Standby Reg For Notebook System Power


      
         
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 TPS51120TPS51123 TPS51124 TPS51125 TPS51220 TPS53124 TPS53125 TPS53126 
TopologyBuck,D-CAP™ Mode  Buck,D-CAP™ Mode  Buck,D-CAP™ Mode  Buck,D-CAP™ Mode  Buck,D-CAP™ Mode  Buck, D-CAP™Mode  Buck, D-CAP2™ Mode  Buck, D-CAP2™ Mode  
Vin(Min)(V)4.5  5.5  3  5.5  4.5  4.5  4.5  4.5  
Vin(Max)(V)28  28  28  28  28  24  24  24  
Vout(Min)(V)1.05  2.0  0.76  2  1  0.76  0.76  0.76  
Vout(Max)(V)5.5  5.5  5.5  5.5  12  5.5  5.5  5.5  
Regulated Outputs(#)2  2  2  2  2  2  2  2  
Iout(Max)(A)20  20  15  20  20  15  15  15  
Switching Frequency(Max)(kHz)580  460  420  460  1000  380  350  350, 700  
Iq(Typ)(mA)0.75  0.55  0.35  0.55  1.3  0.45  0.45  0.45  
Pin/Package32QFN  24VQFN  24VQFN  24VQFN  32QFN  24VQFN, 28TSSOP  24TSSOP  24TSSOP, 24VQFN  
Thermal ShutdownYes  Yes  Yes  Yes  Yes  Yes  Yes  Yes  
Vout2(Min)(V)1.05  2.0  0.76  2  1  0.76  0.76  0.76  
Vout2(Max)(V)5.5  5.5  5.5  5.5  12  5.5  5.5  5.5  
Iout2(A)20  20  20  20  20  15  15  15  
RatingCatalog  Catalog  Catalog  Catalog  Catalog  Catalog  Catalog  Catalog  
Duty Cycle(Max)(%)88  93  88  93  99  89  89  89  
 SamplesSamplesSamplesSamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • TPS51116: DDR1, DDR2, DDR3 Switcher and LDO
  • TPS51117: 1.8V to 28V Input Sync. Step Down Controller with DCAP™ Mode, Optimized for Light Load Efficiency
  • TPS51124: Dual, Synchronous Step Down Controller for Low Voltage System Power
  • TLV431B: Low-Voltage Adjustable Precision Shunt Regulator
  • TPS5430: 5.5V to 36V, 3A, 500kHz Step Down SWIFT™ Converter
  • BQ20Z95: SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track

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Product Information

Features

  • 3.3-V and 5-V 100-mA Bootstrapped Standby Regulators with Independent Enables
  • Selectable D-CAP® Mode Enables Fast Transient Response Less than 100 ns
  • Selectable Low Ripple Current Mode
  • Less than 1% Internal Reference Accuracy
  • Selectable PWM-only/Auto-skip Modes
  • Low-side RDS(on) Loss-less Current Sensing
  • RSENSE Accurate Current Sense Option
  • Internal Soft-start and Integrated VOUT Discharge Transistors
  • Integrated 2-V Reference
  • Adaptive Gate Drivers with Integrated Boost Diode
  • Power Good for Each Channel with Delay Timer
  • Fault Disable Mode
  • Supply Input Voltage Range: 4.5 V to 28 V
  • APPLICATIONS
    • Notebook Computers System Bus and I/O

D-CAP is a registered trademark of Texas Instruments.

Description

The TPS51120 is a highly sophisticated dual current mode synchronous step-down controller. It is a full featured controller designed to run directly off a three- or four-cell Li-ion battery and provide high-power and 5-V and/or 3.3-V standby regulation for all the downstream circuitry in a notebook computer system. High current, 100-mA, 5-V or 3.3-V on-board linear regulators have glitch-free switch over function to SMPS and can be kept alive independently during standby state. The pseudo-constant frequency adaptive on-time control scheme supports full range of current mode operation including simplified loop compensation, ceramic output capacitors as well as seamless transition to reduced frequency operation at light-load condition. Optional D-CAP™ mode operation optimized for SP-CAP or POSCAP output capacitors allows further reduction of external compensation parts. Dynamic UVP supports VIN line sag without latch off by hitting 5V UVP. No negative voltage appears at output voltage node during UVLO, UVP, and OCP, OTP or loss of VIN.

The TPS51120 32-pin QFN package is specified from -40°C to 85°C ambient temperature.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsSamples
TPS51120RHBRACTIVE-40 to 852.20 | 1kuQFN (RHB) | 32 View 3000 | LARGE T&R Download CAD Format for this SymbolPurchase Samples
TPS51120RHBRG4ACTIVE-40 to 852.20 | 1kuQFN (RHB) | 32 View 3000 | LARGE T&R Download CAD Format for this SymbolPurchase Samples
TPS51120RHBTACTIVE-40 to 852.45 | 1kuQFN (RHB) | 32 View 250 | SMALL T&R Download CAD Format for this Symbol
TPS51120RHBTG4ACTIVE-40 to 852.45 | 1kuQFN (RHB) | 32 View 250 | SMALL T&R Download CAD Format for this Symbol

* 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 10:04 AM GMT, 06 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksTPS51120RHBR
AmericasRochester Electronics >1k
AsiaWPI >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksTPS51120RHBRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksTPS51120RHBT
AsiaWPI 222
WorldwideDigiKey >1k
TI Lead Time*: 20 WeeksTPS51120RHBTG4
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
TPS51120RHBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS51120RHBRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS51120RHBT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TPS51120RHBTG4 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 TPS51120 Help

Datasheet

User Guides

View User Guides for DC/DC Controllers (External Switch)

Solution Guides

Tools & Software

NamePart # Company Tool / Software Type
TPS51120 Evaluation ModuleTPS51120EVM-001Texas InstrumentsDevelopment Boards/EVMs

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
TPS51116 DDR1, DDR2, DDR3 Switcher and LDO NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS51117 1.8V to 28V Input Sync. Step Down Controller with DCAP™ Mode, Optimized for Light Load Efficiency NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS51124 Dual, Synchronous Step Down Controller for Low Voltage System Power NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS51220 Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TPS51125 Dual-Synchronous, Step-Down Controller with Out-of-AudioT Operation and 100-mA LDOs NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
TLV431B Low-Voltage Adjustable Precision Shunt Regulator VOLTAGE REFERENCE-SHUNT VOLTAGE REFERENCE TI customers also evaluated this product.
TPS5430 5.5V to 36V, 3A, 500kHz Step Down SWIFT™ Converter DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
BQ20Z95 SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track BATTERY MANAGEMENT-BATTERY FUEL GAUGES TI customers also evaluated this product.
TPS63010 High Efficient Single Inductor Buck-Boost Converter with 2-A Switches DC/DC CONVERTERS (INTEGRATED SWITCH)-BUCK-BOOST REGULATORS TI customers also evaluated this product.
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TPS71728 Single Output LDO, 150mA, Fixed (2.8V), High PSRR, Low Quiescent Current, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
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