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TPS22949 Status: ACTIVE

Current Limited Load Switch With Low Noise Regulation Capability


      
         
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 TPS22941 TPS22942 TPS22943 TPS22944 TPS22945 TPS22946 TPS22949TPS22949A 
Adjustable Current Limit(Min)(A)0.04  0.1  0.04  0.1  0.1  0.155 ,0.07 ,0.03  0.1  0.1  
rDS(on) per FET(Typ)(mOhms)400  400  400  400  400  300  300  300  
Number of FETs1  1  1  1  1  1  2  2  
Enable/ShutdownActive Low  Active Low  Active High  Active High  Active High  Active High  Active High  Active High  
Vin(Min)(V)1.62  1.62  1.62  1.62  1.62  1.62  1.62  1.62  
Vin(Max)(V)5.5  5.5  5.5  5.5  5.5  5.5  4.5  4.5  
Iq(Typ)(uA)40  40  40  40  40  1  85  85  
Pin/Package5SC70  5SC70  5SC70  5SC70  5SC70  6DSBGA  8DSBGA  8DSBGA, 8SON  
 SamplesSamplesSamplesSamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • TLV431A: Low Voltage Adjustable Precision Shunt Regulator
  • TPS51100: 3A Source/Sink DDR terminator Regulator
  • BQ24105: Standalone Synchronous Switch-Mode Li-Ion Charger w/2A FET in QFN-20, 1 to 3 Cells

    • Product Information

    Features

    • Integrated Current Limiter
      • Input Voltage Range: 1.62 V to 4.5 V
      • Low ON-Resistance
        • rON = 300-m at VIN = 4.5 V
        • rON = 350-m at VIN = 3.3 V
        • rON = 400-m at VIN = 2.5 V
        • rON = 600-m at VIN = 1.8 V
      • Integrated 100-mA Minimum Current Limit
      • Undervoltage Lockout
      • Fast-Current Limit Response Time
      • Integrated Fault Blanking and Auto Restart
    • Stable Without Current Limiter Output Capacitor (TPS22949A Only)
    • Integrated Low-Noise RF LDO
      • Input Voltage Range: 1.62 V to 4.5 V
      • Low Noise: 50 µVrms (10 Hz to 100 kHz)
      • 80-dB VIN PSRR (10 Hz to 10 kHz)
      • Fast Start-Up Time: 130 µs
      • Low Dropout 100 mV at Iload =100 mA
      • Integrated Output Discharge
      • Stable With 2.2-µF Output Capacitor
    • 1.8-V Compatible Control Input Threshold
    • ESD Performance Tested Per JESD 22
      • 3500-V Human-Body Model
        (A114-B, Class II)
      • 1000-V Charged-Device Model
        (C101)
    • Tiny 8-Terminal YZP Package (1.9 mm × 0.9 mm,
      0.5-mm Pitch, 0.5-mm Height) and
      SON-8 (DRG) 3.0 mm × 3.0 mm
    • APPLICATIONS
      • Fingerprint Module Protection
      • Portable Consumer Electronics
      • Smart Phone
      • Notebooks
      • Control Access Systems

    Description

    The TPS22949 and TPS22949A are devices that provides protection to systems and loads in high-current conditions. The device contains a 500-m current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 4.5 V as well as a low-dropout (LDO) regulator with a fixed output voltage of 1.8 V.

    The switch is controlled by an on/off input (EN1), which is capable of interfacing directly with low-voltage control signals. When the switch current reaches the maximum limit, the TPS22949/TPS22949A operates in a constant-current mode to prohibit excessive currents from causing damage. If the constant current condition still persists after 12 ms, these devices shut off the switch and pull the fault signal pin (OC) low. The TPS22949/TPS22949A has an auto-restart feature that turns the switch on again after 70 ms if the EN1 pin is still active.

    The output of the current limiter is internally connected to a RF low-dropout (LDO) regulator that offers good ac performance with very low ground current, good power-supply rejection ratio (PSRR), low noise, fast start-up, and excellent line and load transient response. The output of the regulator is stable with ceramic capacitors. This LDO uses a precision voltage reference and feedback loop to achieve overall accuracy of 2% over all load, line, process, and temperature variations.

    The TPS22949A integrates additional internal circuitry that increases the current limit of the switch during the power-up sequence. This feature allows the TPS22949A to operate without a storage capacitor at the input of the LDO.

    The TPS22949 and TPS22949A are available in a space-saving 8-terminal WCSP (YZP) or in a 8-pin SON package (DRG). Both are characterized for operation over the free-air temperature range of –40°C to 85°C.

    		    

    Pricing / Packaging / CAD Design Tools / Samples

    PricePackagingSamples
    DeviceStatusTemp (oC)Price | QuantityPackage | PinsPackage QTY | Package CarrierSamples
    TPS22949YZPRACTIVE-40 to 850.70 | 1kuDSBGA (YZP) | 8 3000 | LARGE 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 10:12 AM GMT, 08 Nov 2009
    RegionCompanyIn StockPurchase
    TI Lead Time*: 14 WeeksTPS22949YZPR
    AmericasArrow >1k
    Avnet >1k
    Newark >1k
    AsiaWPI >1k
    WorldwideDigiKey >1k
    Mouser Electronics >1k
    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
    TPS22949YZPR RoHS Compliant Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIMViewView

    * 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 TPS22949 Help

    Datasheet

    Application Notes

    Customers Who Evaluated This Product Also Evaluated...
    Part # Name Product Family Comments
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    TPS51100 3A Source/Sink DDR terminator Regulator LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
    BQ24105 Standalone Synchronous Switch-Mode Li-Ion Charger w/2A FET in QFN-20, 1 to 3 Cells BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT 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.
    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.
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    TPS79301 Single Output LDO, 200mA, Adj.(1.2 to 5.5V), High PSRR, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
    TPS65053 5-Channel Power Mgmt IC with two step down converters and 3 low-input voltage LDOs POWER MANAGEMENT MULTI-CHANNEL IC (PMIC) SOLUTIONS-PMIC SOLUTIONS WITH AND WITHOUT BATTERY CHARGER TI customers also evaluated this product.

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