1A Very low drop voltage regulator IC

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  • The LDF is a fast, very low drop linear regulator which operates from an input supply voltage in the range of 2.6 V to 16 V.

    It is available in fixed and adjustable output voltage versions, from 0.8 V to 12 V.
    The LDF features are: 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 2.6 to 16 V
    • Very low-dropout voltage (500 mV max. at 1 A load)
    • Low quiescent current (200 μA typ. @ 1 A load)
    • Available in 1% precision in PPAK and DFN6 packages, 2% in DPAK
    • 1 A 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 protections
    • Temperature range: -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
Budgetary Price (US$)*
Quantity
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LDFPT-TR PPACK 5 Tape And Reel - 1 1
Active
0.476 10000
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ECCN (US):

EAR99

Country of Origin:

CHINA

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2494

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LDFPVR DFN6 2x2 Tape And Reel - 1 1
Active
0.476 10000
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ECCN (US):

EAR99

Country of Origin:

CHINA

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3575

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LDFPUR DFN6 3x3 Tape And Reel - 1 1
Active
0.476 10000
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ECCN (US):

EAR99

Country of Origin:

CHINA

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RS COMPONENTS EUROPE 2330 1 Order Now
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Farnell Element14 EUROPE 2994 1 Order Now

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RS COMPONENTS

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2330

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3000

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3000

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3000

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2558

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1

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2994

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LDF33PT-TR PPACK 5 Tape And Reel 3.3 1 1
Active
0.549 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

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Distributor availability ofLDF33PT-TR

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DIGIKEY WORLDWIDE 2500 1 Order Now
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MOUSER WORLDWIDE 2480 1 Order Now
Farnell Element14 EUROPE 1061 1 Order Now
ANGLIA Live EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2019-09-15

Distributor Name

DIGIKEY

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1625

Min.Order

1

Region

EUROPE Order Now

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Stock

2480

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1061

Min.Order

1

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EUROPE Order Now

ANGLIA Live

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-15

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LDF25PT-TR PPACK 5 Tape And Reel 2.5 1 1
Active
0.549 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

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LDF18PT-TR PPACK 5 Tape And Reel 1.8 1 1
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0.549 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

No availability of distributors reported, please contact our sales office
LDF33DT-TR DPAK Tape And Reel 3.3 2 1
Active
0.549 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

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Distributor availability ofLDF33DT-TR

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DIGIKEY WORLDWIDE 1052 1 Order Now
MOUSER WORLDWIDE 1320 1 Order Now
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Distributor reported inventory date: 2019-09-15

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DIGIKEY

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1052

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1

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1320

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1

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3955

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LDFPT-TR

Package

PPACK 5

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFPT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2494 1 Order Now
RS COMPONENTS EUROPE 3505 1 Order Now
MOUSER WORLDWIDE 4051 1 Order Now
Farnell Element14 EUROPE 2230 1 Order Now

Distributor reported inventory date: 2019-09-15

Distributor Name

DIGIKEY

Stock

2494

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3505

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

4051

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2230

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-15

Output Voltage (V) (nom)

-

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFPVR

Package

DFN6 2x2

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFPVR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3575 1 Order Now
Farnell Element14 EUROPE 1841 1 Order Now

Distributor reported inventory date: 2019-09-15

Distributor Name

MOUSER

Stock

3575

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1841

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-15

Output Voltage (V) (nom)

-

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDFPUR

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.476*

Distributor availability ofLDFPUR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 2330 1 Order Now
ARROW EUROPE 3000 0 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 2558 1 Order Now
Farnell Element14 EUROPE 2994 1 Order Now

Distributor reported inventory date: 2019-09-15

Distributor Name

RS COMPONENTS

Stock

2330

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

2558

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2994

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-15

Output Voltage (V) (nom)

-

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Marketing Status

Active

Unit Price (US$)

0.476

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDF33PT-TR

Package

PPACK 5

Packing Type

Tape And Reel

Unit Price (US$)

0.549*

Distributor availability ofLDF33PT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2500 1 Order Now
RS COMPONENTS EUROPE 1625 1 Order Now
MOUSER WORLDWIDE 2480 1 Order Now
Farnell Element14 EUROPE 1061 1 Order Now
ANGLIA Live EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2019-09-15

Distributor Name

DIGIKEY

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1625

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

2480

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1061

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-15

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Marketing Status

Active

Unit Price (US$)

0.549

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDF25PT-TR

Package

PPACK 5

Packing Type

Tape And Reel

Unit Price (US$)

0.549*

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Marketing Status

Active

Unit Price (US$)

0.549

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDF18PT-TR

Package

PPACK 5

Packing Type

Tape And Reel

Unit Price (US$)

0.549*

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Marketing Status

Active

Unit Price (US$)

0.549

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

LDF33DT-TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.549*

Distributor availability ofLDF33DT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1052 1 Order Now
MOUSER WORLDWIDE 1320 1 Order Now
Farnell Element14 EUROPE 3955 1 Order Now

Distributor reported inventory date: 2019-09-15

Distributor Name

DIGIKEY

Stock

1052

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1320

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3955

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-15

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

1

Marketing Status

Active

Unit Price (US$)

0.549

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**
LDF18PT-TR
Active
PPACK 5 Industrial Ecopack2
LDF25PT-TR
Active
PPACK 5 Industrial Ecopack2
LDF33DT-TR
Active
DPAK Industrial Ecopack2
LDF33PT-TR
Active
PPACK 5 Industrial Ecopack2
LDFPT-TR
Active
PPACK 5 Industrial Ecopack2
LDFPUR
Active
DFN6 3x3 Industrial Ecopack2
LDFPVR
Active
DFN6 2x2 Industrial Ecopack2

LDF18PT-TR

Package:

PPACK 5

Material Declaration**:

Marketing Status

Active

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDF25PT-TR

Package:

PPACK 5

Material Declaration**:

Marketing Status

Active

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDF33DT-TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDF33PT-TR

Package:

PPACK 5

Material Declaration**:

Marketing Status

Active

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFPT-TR

Package:

PPACK 5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFPUR

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFPVR

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.