500 mA low quiescent current and low noise voltage regulator

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  • The LD39050 provides 500 mA maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. Stability is given by ceramic capacitors. The ultra low drop voltage, low quiescent current and low noise features make it suitable for low power batterypowered applications. Power supply rejection is 65 dB at low frequencies and starts to roll off at 10 kHz. The enable logic control function puts the LD39050 in shutdown mode allowing a total current consumption lower than 1 μA. The device also includes short-circuit constant current limiting and thermal protection. Typical applications are mobile phones, hard disks and battery-powered systems.

    Key Features

    • Input voltage from 1.5 to 5.5 V
    • Ultra low-dropout voltage (200 mV typ. at 500 mA load)
    • Very low quiescent current (20 μA typ. at no load, 100 μA typ. at 500 mA load, 1 μA max. in OFF mode)
    • Very low noise without bypass capacitor
    • Output voltage tolerance: ± 2.0% @ 25 °C
    • 500 mA guaranteed output current
    • Wide range of output voltages available on request: 0.8 V to 4.5 V with 100 mV step and adjustable from 0.8 V
    • Logic-controlled electronic shutdown
    • Compatible with ceramic capacitor COUT = 1 μF
    • Internal current and thermal limit
    • Package DFN6 (3x3 mm) and DFN6 (2x2 mm)
    • Temperature range: from -40 °C to 125 °C

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Part Number
Package
Packing Type
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Marketing Status
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LD39050PU25R DFN6 3x3 Tape And Reel 2.5 2 0.5
Active
0.405 1000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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5879

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LD39050PVR DFN6 2x2 Tape And Reel - 2 0.5
Preview
0.405 1000
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ECCN (US):

EAR99

Country of Origin:

-

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LD39050PV10R DFN6 2x2 Tape And Reel 1 2 0.5
Active
0.405 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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DIGIKEY WORLDWIDE 2939 1 Order Now
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Distributor reported inventory date: 2019-05-20

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DIGIKEY

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2939

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1

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WORLDWIDE Order Now

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2931

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1

Region

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Distributor reported inventory date: 2019-05-20

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LD39050PUR DFN6 3x3 Tape And Reel - 2 0.5
Active
0.405 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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DIGIKEY WORLDWIDE 26530 1 Order Now
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26530

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1

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6100

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1

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21000

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3000

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1700

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0

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2213

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33000

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3000

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34444

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6669

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3000

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LD39050PU33R DFN6 3x3 Tape And Reel 3.3 2 0.5
Active
0.405 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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MOUSER WORLDWIDE 12623 1 Order Now
Farnell Element14 EUROPE 18645 1 Order Now

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DIGIKEY

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13755

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1

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FUTURE

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3000

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3000

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WORLDWIDE Order Now

ARROW

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3000

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0

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Newark Element14

Stock

961

Min.Order

0

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AMERICA Order Now

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Stock

12623

Min.Order

1

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18645

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1

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Distributor reported inventory date: 2019-05-20

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LD39050PU25R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.405*

Distributor availability ofLD39050PU25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5879 1 Order Now
AVNET AMERICA 9000 0 Order Now
MOUSER WORLDWIDE 3000 1 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

5879

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

9000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-05-20

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.405

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LD39050PVR

Package

DFN6 2x2

Packing Type

Tape And Reel

Unit Price (US$)

0.405*

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Preview

Unit Price (US$)

0.405

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

LD39050PV10R

Package

DFN6 2x2

Packing Type

Tape And Reel

Unit Price (US$)

0.405*

Distributor availability ofLD39050PV10R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2939 1 Order Now
MOUSER WORLDWIDE 2931 1 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

2939

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2931

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-05-20

Output Voltage (V) (nom)

1

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.405

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LD39050PUR

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.405*

Distributor availability ofLD39050PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 26530 1 Order Now
RS COMPONENTS EUROPE 6100 1 Order Now
FUTURE WORLDWIDE 21000 3000 Order Now
ARROW EUROPE 1700 0 Order Now
Newark Element14 AMERICA 2213 0 Order Now
ARROW AMERICA 33000 3000 Order Now
MOUSER WORLDWIDE 34444 1 Order Now
Farnell Element14 EUROPE 6669 1 Order Now
ANGLIA Live EUROPE 3000 1 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

26530

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

6100

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

21000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

1700

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

2213

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

33000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

34444

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6669

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

3000

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-20

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.405

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LD39050PU33R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.405*

Distributor availability ofLD39050PU33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13755 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
ARROW EUROPE 3000 0 Order Now
Newark Element14 AMERICA 961 0 Order Now
MOUSER WORLDWIDE 12623 1 Order Now
Farnell Element14 EUROPE 18645 1 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

13755

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

961

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

12623

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

18645

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-20

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.405

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Technical Documentation

    • Description Version Size Action
      DS6129
      500 mA low quiescent current and low noise voltage regulator
      4.0
      719.36 KB
      PDF
      DS6129

      500 mA low quiescent current and low noise voltage regulator

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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LD39050PU25R
Active
DFN6 3x3 Industrial Ecopack2
LD39050PU33R
Active
DFN6 3x3 Industrial Ecopack2
LD39050PUR
Active
DFN6 3x3 Industrial Ecopack2
LD39050PV10R
Active
DFN6 2x2 Industrial Ecopack2
LD39050PVR
Preview
DFN6 2x2 Industrial Ecopack2

LD39050PU25R

Package:

DFN6 3x3

Material Declaration**:

XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD39050PU33R

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD39050PUR

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD39050PV10R

Package:

DFN6 2x2

Material Declaration**:

Marketing Status

Active

Package

DFN6 2x2

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD39050PVR

Package:

DFN6 2x2

Material Declaration**:

Marketing Status

Preview

Package

DFN6 2x2

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.