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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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Technical Documentation

    • Description Version Size Action
      DS6129
      500 mA low quiescent current and low noise voltage regulator
      5.0
      1.12 MB
      PDF
      DS6129

      500 mA low quiescent current and low noise voltage regulator

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

    • Description Version Size Action
      Low-dropout (LDO) linear voltage regulators Quick Reference Guide 2.1
      1.78 MB
      PDF
      Power management for handheld and portable 2.0
      1.09 MB
      PDF

      Low-dropout (LDO) linear voltage regulators Quick Reference Guide

      Power management for handheld and portable

Quality and Reliability

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
Active
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

Active

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Package
Packing Type
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
LD39050PU25R Available at 3 distributors

Distributor availability ofLD39050PU25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5587 1 Order Now
AVNET AMERICA 12000 0 Order Now
MOUSER WORLDWIDE 2961 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

5587

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2961

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-06

Get sample DFN6 3x3 Tape And Reel 2.5 2 0.5
Active
EAR99 MALAYSIA 0.405 / 1k
LD39050PVR Available at 3 distributors

Distributor availability ofLD39050PVR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2000 1 Order Now
MOUSER WORLDWIDE 1996 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1996

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Buy now DFN6 2x2 Tape And Reel - 2 0.5
Active
EAR99 MALAYSIA 0.405 / 1k
LD39050PV10R Available at 1 distributors

Distributor availability ofLD39050PV10R

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

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

2939

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-06

Buy now DFN6 2x2 Tape And Reel 1 2 0.5
Active
EAR99 MALAYSIA 0.405 / 1k
LD39050PUR Available at 8 distributors

Distributor availability ofLD39050PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10687 1 Order Now
RS COMPONENTS EUROPE 4610 1 Order Now
AVNET AMERICA 12000 0 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
Newark Element14 AMERICA 1886 0 Order Now
MOUSER WORLDWIDE 28682 1 Order Now
Farnell Element14 EUROPE 4757 1 Order Now
ANGLIA Live EUROPE 2950 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

10687

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

4610

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

Newark Element14

Stock

1886

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

28682

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4757

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

2950

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Get sample DFN6 3x3 Tape And Reel - 2 0.5
Active
EAR99 MALAYSIA 0.405 / 1k
LD39050PU33R Available at 7 distributors

Distributor availability ofLD39050PU33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9629 1 Order Now
COMPEL EUROPE 500 1 Order Now
RS COMPONENTS EUROPE 2680 1 Order Now
ARROW EUROPE 3000 0 Order Now
Newark Element14 AMERICA 894 0 Order Now
MOUSER WORLDWIDE 5119 1 Order Now
Farnell Element14 EUROPE 3632 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

9629

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

500

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2680

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

894

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5119

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3632

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Get sample DFN6 3x3 Tape And Reel 3.3 2 0.5
Active
EAR99 MALAYSIA 0.405 / 1k

LD39050PU25R

Package

DFN6 3x3

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.405 / 1k

Distributor availability ofLD39050PU25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5587 1 Order Now
AVNET AMERICA 12000 0 Order Now
MOUSER WORLDWIDE 2961 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

5587

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2961

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-06

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.405 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LD39050PVR

Package

DFN6 2x2

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.405 / 1k

Distributor availability ofLD39050PVR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2000 1 Order Now
MOUSER WORLDWIDE 1996 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1996

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.405 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LD39050PV10R

Package

DFN6 2x2

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.405 / 1k

Distributor availability ofLD39050PV10R

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

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

2939

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-06

Output Voltage (V) (nom)

1

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.405 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LD39050PUR

Package

DFN6 3x3

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.405 / 1k

Distributor availability ofLD39050PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10687 1 Order Now
RS COMPONENTS EUROPE 4610 1 Order Now
AVNET AMERICA 12000 0 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
Newark Element14 AMERICA 1886 0 Order Now
MOUSER WORLDWIDE 28682 1 Order Now
Farnell Element14 EUROPE 4757 1 Order Now
ANGLIA Live EUROPE 2950 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

10687

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

4610

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

Newark Element14

Stock

1886

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

28682

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4757

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

2950

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.405 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LD39050PU33R

Package

DFN6 3x3

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.405 / 1k

Distributor availability ofLD39050PU33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9629 1 Order Now
COMPEL EUROPE 500 1 Order Now
RS COMPONENTS EUROPE 2680 1 Order Now
ARROW EUROPE 3000 0 Order Now
Newark Element14 AMERICA 894 0 Order Now
MOUSER WORLDWIDE 5119 1 Order Now
Farnell Element14 EUROPE 3632 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

9629

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

500

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2680

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

894

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5119

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3632

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.405 / 1k

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