LD2981

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Design Win

Ultra low drop voltage regulators with inhibit low ESR output

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Product overview

Description

The LD2981 is a 100 mA fixed-output voltage regulator. The low-drop voltage and the ultra low quiescent current make them suitable for low noise, low power applications and in battery powered systems.

The quiescent current in sleep mode is less than 1 μA when INHIBIT pin is pulled low. Shutdown logic control function is available on pin n° 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD2981 is designed to work with low ESR ceramic capacitor. Typical applications are in cellular phone, palmtop/laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.

  • All features

    • Ultra low dropout voltage (0.17 V typ. at 100 mA load, 7 mV typ. at 1 mA load)
    • Very low quiescent current (80 μA typ. at no load in on mode; max 1 μA in off mode)
    • Guaranteed output current up to 100 mA
    • Logic-controlled electronic shutdown
    • Output voltage of 2.5; 3.0; 3.3; 5.0 V
    • Internal current and thermal limit
    • ± 0.75% tolerance output voltage available (A version)
    • Output low noise voltage 160 μVRMS
    • Temperature range: -40 to 125 °C
    • Small package SOT23-5L and SOT-89
    • Fast dynamic response to line and load changes

EDA Symbols, Footprints and 3D Models

STMicroelectronics - LD2981

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Symbols

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Footprints

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3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LD2981ABM30TR
Active
SOT23-5L Industrial Ecopack2
LD2981ABM33TR
Active
SOT23-5L Industrial Ecopack2
LD2981ABM50TR
Active
SOT23-5L Industrial Ecopack2
LD2981ABU33TR
Active
SOT-89 Industrial Ecopack2
LD2981ABU50TR
Active
SOT-89 Industrial Ecopack2
LD2981CM30TR
Active
SOT23-5L Industrial Ecopack2
LD2981CM33TR
Active
SOT23-5L Industrial Ecopack2
LD2981CM50TR
Active
SOT23-5L Industrial Ecopack2
LD2981CU33TR
Active
SOT-89 Industrial Ecopack2
LD2981CU50TR
Active
SOT-89 Industrial Ecopack2

LD2981ABM30TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981ABM33TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981ABM50TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981ABU33TR

Package:

SOT-89

Material Declaration**:

Marketing Status

Active

Package

SOT-89

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981ABU50TR

Package:

SOT-89

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-89

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981CM30TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981CM33TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981CM50TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981CU33TR

Package:

SOT-89

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-89

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2981CU50TR

Package:

SOT-89

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-89

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

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Part Number
Order from distributors
Order from ST
Marketing Status
Grade
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Budgetary Price (US$)*/Qty
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Unit Price (US$)
Country of Origin
min
max
LD2981ABU50TR Available at distributors

Distributor availability of LD2981ABU50TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT-89 -40 125

5

0.75

0.1

0.3185

CHINA

LD2981CM33TR Available at distributors

Distributor availability of LD2981CM33TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT23-5L -40 125

3.3

0.75

0.1

0.3286

CHINA

LD2981ABM50TR Available at distributors

Distributor availability of LD2981ABM50TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT23-5L -40 125

5

0.75

0.1

0.3286

CHINA

LD2981CM30TR Available at distributors

Distributor availability of LD2981CM30TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT23-5L -40 125

3

0.75

0.1

0.206

CHINA

LD2981ABU33TR Available at distributors

Distributor availability of LD2981ABU33TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT-89 -40 125

3.3

0.75

0.1

0.3185

CHINA

LD2981ABM30TR Available at distributors

Distributor availability of LD2981ABM30TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT23-5L -40 125

3

0.75

0.1

0.3286

CHINA

LD2981ABM33TR Available at distributors

Distributor availability of LD2981ABM33TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT23-5L -40 125

3.3

0.75

0.1

0.3286

CHINA

LD2981CU50TR Available at distributors

Distributor availability of LD2981CU50TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT-89 -40 125

5

0.75

0.1

0.263

CHINA

LD2981CM50TR Available at distributors

Distributor availability of LD2981CM50TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT23-5L -40 125

5

0.75

0.1

0.3286

CHINA

LD2981CU33TR Available at distributors

Distributor availability of LD2981CU33TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
Industrial EAR99 NEC Tape and Reel SOT-89 -40 125

3.3

0.75

0.1

0.263

CHINA

LD2981ABU50TR Active

Package:
SOT-89
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981ABU50TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

5

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981CM33TR Active

Package:
SOT23-5L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981CM33TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981ABM50TR Active

Package:
SOT23-5L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981ABM50TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

5

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981CM30TR Active

Package:
SOT23-5L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981CM30TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

3

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981ABU33TR Active

Package:
SOT-89
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981ABU33TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981ABM30TR Active

Package:
SOT23-5L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981ABM30TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

3

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981ABM33TR Active

Package:
SOT23-5L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981ABM33TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981CU50TR Active

Package:
SOT-89
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981CU50TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

5

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981CM50TR Active

Package:
SOT23-5L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981CM50TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

5

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

LD2981CU33TR Active

Package:
SOT-89
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

LD2981CU33TR

Grade:

Industrial

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

0.75

Output Current (A) (nom):

0.1

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

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(*) 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