1 A Very low drop voltage regulator

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Product overview

Description

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.
  • All 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

EDA Symbols, Footprints and 3D Models

STMicroelectronics - LDF

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LDF18PT-TR
NRND
PPACK 5 Industrial Ecopack2
LDF25PT-TR
NRND
PPACK 5 Industrial Ecopack2
LDF33DT-TR
NRND
DPAK Industrial Ecopack2
LDF33PT-TR
NRND
PPACK 5 Industrial Ecopack2
LDFPT-TR
NRND
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

NRND

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDF25PT-TR

Package:

PPACK 5

Material Declaration**:

Marketing Status

NRND

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDF33DT-TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDF33PT-TR

Package:

PPACK 5

Material Declaration**:

Marketing Status

NRND

Package

PPACK 5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDFPT-TR

Package:

PPACK 5

Material Declaration**:

PDF XML

Marketing Status

NRND

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**:

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Output Voltage (V) (nom)
Budgetary Price (US$)*/Qty
More info
min
max
LDFPT-TR Available at 4 distributors

Distributor availability ofLDFPT-TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1385 1 Buy from Distributor
Newark Element14 AMERICA 83 0 Buy from Distributor
MOUSER WORLDWIDE 2500 1 Buy from Distributor
Farnell Element14 EUROPE 94 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

RS COMPONENTS

Stock

1385

Min.Order

1

Newark Element14

Stock

83

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

2500

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

94

Min.Order

1

Distributor reported inventory date: 2021-10-20

Buy Direct
NRND
EAR99 NEC Tape And Reel PPACK 5 -40 125 - 0.476 / 1k
MORE INFO

Output Tolerance (typ):

1

Output Current (A) (nom):

1

Unit Price (US$):

0.476

Country of Origin:

CHINA

LDFPVR Available at 2 distributors

Distributor availability ofLDFPVR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2712 1 Buy from Distributor
Farnell Element14 EUROPE 2998 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

MOUSER

Stock

2712

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2998

Min.Order

1

Distributor reported inventory date: 2021-10-20

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 2x2 -40 125 - 0.5236 / 1k
MORE INFO

Output Tolerance (typ):

1

Output Current (A) (nom):

1

Unit Price (US$):

0.5236

Country of Origin:

CHINA

LDFPUR Available at 1 distributors

Distributor availability ofLDFPUR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 406 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

MOUSER

Stock

406

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-20

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 - 0.5236 / 1k
MORE INFO

Output Tolerance (typ):

1

Output Current (A) (nom):

1

Unit Price (US$):

0.5236

Country of Origin:

CHINA

LDF33PT-TR Available at 4 distributors

Distributor availability ofLDF33PT-TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1055 1 Buy from Distributor
MOUSER WORLDWIDE 2491 1 Buy from Distributor
Farnell Element14 EUROPE 1095 1 Buy from Distributor
ANGLIA Live EUROPE 2500 2500 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

RS COMPONENTS

Stock

1055

Min.Order

1

MOUSER

Stock

2491

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1095

Min.Order

1

ANGLIA Live

Stock

2500

Min.Order

2500

Distributor reported inventory date: 2021-10-20

Buy Direct
NRND
EAR99 NEC Tape And Reel PPACK 5 -40 125 3.3 0.6039 / 1k
MORE INFO

Output Tolerance (typ):

1

Output Current (A) (nom):

1

Unit Price (US$):

0.6039

Country of Origin:

CHINA

LDF25PT-TR Available at 1 distributors

Distributor availability ofLDF25PT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-20

NRND
EAR99 NEC Tape And Reel PPACK 5 -40 125 2.5 0.6039 / 1k
MORE INFO

Output Tolerance (typ):

1

Output Current (A) (nom):

1

Unit Price (US$):

0.6039

Country of Origin:

CHINA

LDF18PT-TR Available at 1 distributors

Distributor availability ofLDF18PT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 498 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

DIGIKEY

Stock

498

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-20

NRND
EAR99 NEC Tape And Reel PPACK 5 -40 125 1.8 0.6039 / 1k
MORE INFO

Output Tolerance (typ):

1

Output Current (A) (nom):

1

Unit Price (US$):

0.6039

Country of Origin:

CHINA

LDF33DT-TR Available at 4 distributors

Distributor availability ofLDF33DT-TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1930 1 Buy from Distributor
Newark Element14 AMERICA 379 0 Buy from Distributor
MOUSER WORLDWIDE 3710 1 Buy from Distributor
Farnell Element14 EUROPE 2485 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

RS COMPONENTS

Stock

1930

Min.Order

1

Newark Element14

Stock

379

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

3710

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2485

Min.Order

1

Distributor reported inventory date: 2021-10-20

Buy Direct
NRND
EAR99 NEC Tape And Reel DPAK -40 125 3.3 0.6039 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Unit Price (US$):

0.6039

Country of Origin:

CHINA

LDFPT-TR

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.476 / 1k

Distributor availability ofLDFPT-TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1385 1 Buy from Distributor
Newark Element14 AMERICA 83 0 Buy from Distributor
MOUSER WORLDWIDE 2500 1 Buy from Distributor
Farnell Element14 EUROPE 94 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

RS COMPONENTS

Stock

1385

Min.Order

1

Newark Element14

Stock

83

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

2500

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

94

Min.Order

1

Distributor reported inventory date: 2021-10-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PPACK 5

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

-

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.476 / 1k

Country of Origin

CHINA

LDFPVR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5236 / 1k

Distributor availability ofLDFPVR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2712 1 Buy from Distributor
Farnell Element14 EUROPE 2998 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

MOUSER

Stock

2712

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2998

Min.Order

1

Distributor reported inventory date: 2021-10-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 2x2

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

-

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.5236 / 1k

Country of Origin

CHINA

LDFPUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5236 / 1k

Distributor availability ofLDFPUR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 406 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

MOUSER

Stock

406

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

-

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.5236 / 1k

Country of Origin

CHINA

LDF33PT-TR

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6039 / 1k

Distributor availability ofLDF33PT-TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1055 1 Buy from Distributor
MOUSER WORLDWIDE 2491 1 Buy from Distributor
Farnell Element14 EUROPE 1095 1 Buy from Distributor
ANGLIA Live EUROPE 2500 2500 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

RS COMPONENTS

Stock

1055

Min.Order

1

MOUSER

Stock

2491

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1095

Min.Order

1

ANGLIA Live

Stock

2500

Min.Order

2500

Distributor reported inventory date: 2021-10-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PPACK 5

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.6039 / 1k

Country of Origin

CHINA

LDF25PT-TR

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6039 / 1k

Distributor availability ofLDF25PT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PPACK 5

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.6039 / 1k

Country of Origin

CHINA

LDF18PT-TR

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6039 / 1k

Distributor availability ofLDF18PT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 498 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

DIGIKEY

Stock

498

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PPACK 5

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

1

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.6039 / 1k

Country of Origin

CHINA

LDF33DT-TR

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6039 / 1k

Distributor availability ofLDF33DT-TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1930 1 Buy from Distributor
Newark Element14 AMERICA 379 0 Buy from Distributor
MOUSER WORLDWIDE 3710 1 Buy from Distributor
Farnell Element14 EUROPE 2485 1 Buy from Distributor

Distributor reported inventory date: 2021-10-20

Distributor Name

RS COMPONENTS

Stock

1930

Min.Order

1

Newark Element14

Stock

379

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

3710

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2485

Min.Order

1

Distributor reported inventory date: 2021-10-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DPAK

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.6039 / 1k

Country of Origin

CHINA

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