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REG103-A Status: ACTIVE

Single Output LDO, 500mA, Adj.(1.295 to 5.5V), Low Noise, Fast Transient Response


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Datasheet

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 REG103-25 REG103-33 REG103-5 REG103-A
Iout(Max)(A)0.5  0.5  0.5  0.5  
Vdo(Typ)(mV)115  115  160  115  
Iq(Typ)(mA)0.5  0.5  0.5  0.5  
Vin(Min)(V)2.1  2.1  2.1  2.1  
Vin(Max)(V)15  15  15  15  
Vout(Min)(V)2.5  3.3  5   
Vout(Max)(V)2.5  3.3  5   
Vout Adj(Min)(V)   1.295  
Vout Adj(Max)(V)   5.5  
Accuracy(%)2  2  2  2  
Output Capacitor TypeCapacitor Free  Capacitor Free  Capacitor Free  Capacitor Free  
Fixed Output Options(V)2.5  3.3  5   
Pin/Package5DDPAK/TO-263, 6SOT-223, 8SOIC  5DDPAK/TO-263, 6SOT-223, 8SOIC  5DDPAK/TO-263, 6SOT-223, 8SOIC  5DDPAK/TO-263, 6SOT-223, 8SOIC  
RatingCatalog  Catalog  Catalog  Catalog  
Regulated Outputs(#)1  1  1  1  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • TPS73501: Single Output LDO, 500mA, Adjustable, Low Quiescent Current, Low Noise, High PSRR
  • REG104-A: Single Output LDO, 1.0A, Adj.(1.295 to 5.5V), Low Noise, Fast Transient Response
  • REG103-33: Single Output LDO, 500mA, Fixed(3.3V), Low Noise, Fast Transient Response

Product Information

Features

  • NEW DMOS TOPOLOGY:
    Ultra Low Dropout Voltage:
    115mV Typ at 500mA and 3.3V Output
    Output Capacitor NOT Required for Stability
  • FAST TRANSIENT RESPONSE
  • VERY LOW NOISE: 33µVrms
  • HIGH ACCURACY: ±2% max
  • HIGH EFFICIENCY:
    IGND = 1mA at IOUT = 500mA
    Not Enabled: IGND = 0.5µA
  • 2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE OUTPUT VERSIONS
  • FOLDBACK CURRENT LIMIT
  • THERMAL PROTECTION
  • OUTPUT VOLTAGE ERROR INDICATOR(1)
  • SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5, SO-8
  • APPLICATIONS
    • PORTABLE COMMUNICATION DEVICES
    • BATTERY-POWERED EQUIPMENT
    • PERSONAL DIGITAL ASSISTANTS
    • MODEMS
    • BAR-CODE SCANNERS
    • BACKUP POWER SUPPLIES

All trademarks are the property of their respective owners.

Description

The REG103 is a family of low-noise, low-dropout, linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low-dropout voltage (only 115mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 1mA (at IOUT = 500mA) and drops to 0.5µA in not enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions. The REG103 has very low output noise (typically 33µVrms for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. On-chip trimming results in high output voltage accuracy. Accuracy is maintained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (–40°C to +85°C).

The SO-8 version of the REG103 has an ERROR\ pin that provides a power good flag, indicating the regulator is in regulation. The REG103 is well protected—internal circuitry provides a current limit that protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. In addition to the SO-8 package, the REG103 is also available in the DDPAK and the SOT223-5.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusReplaced ByPrice | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
REG103FA-AOBSOLETEREG104FA-AKTTT DDPAK/TO-263 (KTT) | 5 View   Download CAD Format for this Symbol Replaced by REG104FA-AKTTT
REG103FA-A/500NRNDREG104FA-A/5003.70 | 1kuDDPAK/TO-263 (KTT) | 5 View 500 | LARGE T&R Download CAD Format for this Symbol Replaced by REG104FA-A/500
REG103FA-AKTTTACTIVE 3.70 | 1kuDDPAK/TO-263 (KTT) | 5 View 50 | SMALL T&R Download CAD Format for this Symbol 
REG103FA-AKTTTG3ACTIVE 3.70 | 1kuDDPAK/TO-263 (KTT) | 5 View 50 | SMALL T&R Download CAD Format for this Symbol 
REG103GA-AACTIVE 3.20 | 1kuSOT-223 (DCQ) | 6 View 78 | TUBE Download CAD Format for this Symbol 
REG103GA-A/2K5NRNDREG104GA-A/2K52.90 | 1kuSOT-223 (DCQ) | 6 View 2500 | LARGE T&R Download CAD Format for this Symbol Replaced by REG104GA-A/2K5
REG103GA-A/2K5G4NRND 2.90 | 1kuSOT-223 (DCQ) | 6 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
REG103GA-AG4ACTIVE 3.20 | 1kuSOT-223 (DCQ) | 6 View 78 | TUBE  Download CAD Format for this FootprintPurchase Samples
REG103UA-AACTIVE 2.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
REG103UA-A/2K5NRNDREG102UA-A/2K52.25 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintReplaced by REG102UA-A/2K5
REG103UA-A/2K5G4NRND 2.25 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
REG103UA-AG4ACTIVE 2.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase 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 11:27 AM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
Call**REG103FA-A
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksREG103FA-A/500
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksREG103FA-AKTTT
AsiaFarnell Asia 50
EuropeFarnell 50
WorldwideDigiKey 180
TI Lead Time*: 4 WeeksREG103FA-AKTTTG3
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksREG103GA-A
AmericasArrow 35
Avnet 453
Rochester Electronics 139
EuropeAvnet-SILICA 43
EBV Elektronik 39
WorldwideDigiKey >1k
Mouser Electronics 2
TI Lead Time*: 4 WeeksREG103GA-A/2K5
AmericasArrow >1k
Rochester Electronics >1k
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksREG103GA-A/2K5G4
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksREG103GA-AG4
AsiaFarnell Asia 255
EuropeFarnell 245
WorldwideDigiKey  Available
Mouser Electronics 33
TI Lead Time*: 20 WeeksREG103UA-A
AmericasArrow 25
Avnet 230
Newark 199
EuropeArrow Northern Europe 25
Spoerle 75
WorldwideDigiKey 138
Mouser Electronics 92
TI Lead Time*: 20 WeeksREG103UA-A/2K5
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksREG103UA-A/2K5G4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksREG103UA-AG4
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
REG103FA-A/500  Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
REG103FA-AKTTT RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
REG103FA-AKTTTG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
REG103GA-A RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
REG103GA-A/2K5  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
REG103GA-A/2K5G4  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
REG103GA-AG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
REG103UA-A RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
REG103UA-A/2K5  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
REG103UA-A/2K5G4  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
REG103UA-AG4 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 REG103-A Help

Datasheet

Application Notes

View Application Notes for Single Channel LDO

User Guides

View User Guides for Single Channel LDO

More Literature

View More Literature for Single Channel LDO

Tools & Software

NamePart # Company Tool / Software Type
DEM-SOT223LDO Compatible with Most Positive Output LDOs in SOT223 (DCQ) PackageDEM-SOT223LDOTexas InstrumentsDevelopment Boards/EVMs
SOT23 LDO, 5 V to 1.0 V, 100mA output power supplyTPS76933EVM-127Texas InstrumentsDevelopment Boards/EVMs
SOT23 LDO, 5 V to 1.8 V, 100mA output power supplyTPS76901EVM-127Texas InstrumentsDevelopment Boards/EVMs
SOT23 LDO, 5 V to 3.3 V, 100mA output power supplyTPS76918EVM-127Texas InstrumentsDevelopment Boards/EVMs
TPS76xxxEVM-125 Universal SOT-23 LDO Evaluation ModuleTPS76XXXEVM-125Texas InstrumentsDevelopment Boards/EVMs
TPS79301 Evaluation ModuleTPS79301EVMTexas InstrumentsDevelopment Boards/EVMs
TPS79328 Evaluation ModuleTPS79328EVMTexas InstrumentsDevelopment Boards/EVMs

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
TPS73501 Single Output LDO, 500mA, Adjustable, Low Quiescent Current, Low Noise, High PSRR LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
REG104-A Single Output LDO, 1.0A, Adj.(1.295 to 5.5V), Low Noise, Fast Transient Response LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
REG103-33 Single Output LDO, 500mA, Fixed(3.3V), Low Noise, Fast Transient Response LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.

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