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  • The LDFM is a fast, very low drop linear regulator which operates from an input supply voltage in the range of 2.5 V to 16 V.

    It is available in fixed and adjustable output voltage versions, from 0.8 V to 12 V.
    The LDFM features high output precision, very low dropout voltage, low noise, and low quiescent current, therefore suitable for low voltage microprocessors and memory applications.
    Enable logic control pin and Power Good output are featured on PPAK/DFN packages.
    Current and thermal protection are provided.

    Key Features

    • Input voltage from 2.5 to 16 V
    • Very low dropout voltage (300 mV max. at 500 mA load)
    • Low quiescent current (200 µA typ. @ 500 mA load)
    • Available in 1 % precision in PPAK and DFN6 packages, 2 % in DPAK
    • 500 mA guaranteed output current
    • Wide range of output voltages available on request: adjustable from 0.8 V, fixed up to 12 V in 100 mV steps
    • Logic-controlled electronic shutdown
    • Power Good (PPAK and DFN packages)
    • Fast dynamic response to line and load changes
    • Internal current and thermal protection
    • Temperature range: - 40 °C to 125 °C

Sample & Buy

Part Number
Package
Packing Type
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Marketing Status
Budgetary Price (US$)*
Quantity
More info
Order from Distributors
Order from ST
LDFM50DT-TR DPAK Tape And Reel 5 2 0.5
Active
0.476 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofLDFM50DT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2490 1 Order Now
MOUSER WORLDWIDE 3191 1 Order Now
Farnell Element14 EUROPE 2414 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

2490

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3191

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2414

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Get sample
LDFMPUR DFN6 3x3 Tape And Reel - 2 0.5
Active
0.476 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofLDFMPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 393 1 Order Now
FUTURE WORLDWIDE 9000 3000 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 1453 1 Order Now
Farnell Element14 EUROPE 2711 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

393

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

9000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1453

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2711

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Get sample
LDFMPVR DFN6 2x2 Tape And Reel - 2 0.5
Active
0.476 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofLDFMPVR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1733 1 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 3770 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

1733

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3770

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-11-13

Get sample
LDFM33PUR DFN6 3x3 Tape And Reel - 2 0.5
Active
0.476 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofLDFM33PUR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 381 1 Order Now
Farnell Element14 EUROPE 30 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

MOUSER

Stock

381

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

30

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Buy now
LDFMPT-TR PPACK 5 Tape And Reel - 2 0.5
Active
0.476 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofLDFMPT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4225 1 Order Now
RS COMPONENTS EUROPE 2985 1 Order Now
MOUSER WORLDWIDE 1343 1 Order Now
Farnell Element14 EUROPE 1366 1 Order Now
ANGLIA Live EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

4225

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2985

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1343

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1366

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Get sample
LDFM33PVR DFN6 2x2 Tape And Reel - 2 0.5
Active
0.476 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofLDFM33PVR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2040 1 Order Now
Farnell Element14 EUROPE 55 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

MOUSER

Stock

2040

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

55

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Buy now
LDFM50PT-TR PPACK 5 Tape And Reel 5 2 0.5
Active
0.476 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofLDFM50PT-TR

Distributor Name
Region Stock Min. Order Third party link
Newark Element14 AMERICA 50 0 Order Now
MOUSER WORLDWIDE 2462 1 Order Now
Farnell Element14 EUROPE 4323 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

Newark Element14

Stock

50

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2462

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4323

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Get sample

LDFM50DT-TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFM50DT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2490 1 Order Now
MOUSER WORLDWIDE 3191 1 Order Now
Farnell Element14 EUROPE 2414 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

2490

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3191

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2414

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFMPUR

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFMPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 393 1 Order Now
FUTURE WORLDWIDE 9000 3000 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 1453 1 Order Now
Farnell Element14 EUROPE 2711 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

393

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

9000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1453

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2711

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFMPVR

Package

DFN6 2x2

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFMPVR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1733 1 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 3770 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

1733

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3770

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-11-13

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFM33PUR

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFM33PUR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 381 1 Order Now
Farnell Element14 EUROPE 30 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

MOUSER

Stock

381

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

30

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFMPT-TR

Package

PPACK 5

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFMPT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4225 1 Order Now
RS COMPONENTS EUROPE 2985 1 Order Now
MOUSER WORLDWIDE 1343 1 Order Now
Farnell Element14 EUROPE 1366 1 Order Now
ANGLIA Live EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

4225

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2985

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1343

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1366

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFM33PVR

Package

DFN6 2x2

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFM33PVR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2040 1 Order Now
Farnell Element14 EUROPE 55 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

MOUSER

Stock

2040

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

55

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFM50PT-TR

Package

PPACK 5

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFM50PT-TR

Distributor Name
Region Stock Min. Order Third party link
Newark Element14 AMERICA 50 0 Order Now
MOUSER WORLDWIDE 2462 1 Order Now
Farnell Element14 EUROPE 4323 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

Newark Element14

Stock

50

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2462

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4323

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

(*) 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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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LDFM33PUR
Active
DFN6 3x3 Industrial Ecopack2
LDFM33PVR
Active
DFN6 2x2 Industrial Ecopack2
LDFM50DT-TR
Active
DPAK Industrial Ecopack2
LDFM50PT-TR
Active
PPACK 5 Industrial Ecopack2
LDFMPT-TR
Active
PPACK 5 Industrial Ecopack2
LDFMPUR
Active
DFN6 3x3 Industrial Ecopack2
LDFMPVR
Active
DFN6 2x2 Industrial Ecopack2

LDFM33PUR

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFM33PVR

Package:

DFN6 2x2

Material Declaration**:

Marketing Status

Active

Package

DFN6 2x2

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFM50DT-TR

Package:

DPAK

Material Declaration**:

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFM50PT-TR

Package:

PPACK 5

Material Declaration**:

Marketing Status

Active

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFMPT-TR

Package:

PPACK 5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFMPUR

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFMPVR

Package:

DFN6 2x2

Material Declaration**:

PDF XML

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.