L78S

Active

positive voltage regulator

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Product overview

Description

The L78S series of three-terminal positive regulators is available in TO-220 package and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type embeds internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 2 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.
  • All features

    • Output current up to 2 A
    • Output voltages of 5; 7.5; 9; 10; 12; 15; 18; 24 V
    • Thermal protection
    • Short circuit protection
    • Output transition SOA protection

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EDA Symbols, Footprints and 3D Models

STMicroelectronics - L78S

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L78S05CV
Active
TO-220 Industrial Ecopack2
L78S09CV
Active
TO-220 Industrial Ecopack2
L78S10CV
Active
TO-220 Industrial Ecopack2
L78S12CV
Active
TO-220 Industrial Ecopack2
L78S15CV
Active
TO-220 Industrial Ecopack2
L78S18CV
Active
TO-220 Industrial Ecopack2
L78S24CV
Active
TO-220 Industrial Ecopack2
L78S75CV
Active
TO-220 Industrial Ecopack2

L78S05CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S09CV

Package:

TO-220

Material Declaration**:

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S10CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S12CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S15CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S18CV

Package:

TO-220

Material Declaration**:

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S24CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S75CV

Package:

TO-220

Material Declaration**:

Marketing Status

Active

Package

TO-220

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) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L78S75CV Available at 3 distributors

Distributor availability ofL78S75CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1233 1 Order Now
RS COMPONENTS EUROPE 1239 10 Order Now
MOUSER WORLDWIDE 1790 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

1233

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1239

Min.Order

10

Region

EUROPE Order Now

MOUSER

Stock

1790

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.259 / 1k
L78S10CV Available at 6 distributors

Distributor availability ofL78S10CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3508 1 Order Now
RS COMPONENTS EUROPE 3790 50 Order Now
AVNET AMERICA 3000 0 Order Now
Newark Element14 AMERICA 34 0 Order Now
MOUSER WORLDWIDE 3678 1 Order Now
Farnell Element14 EUROPE 3739 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

3508

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3790

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

34

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3678

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3739

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.252 / 1k
L78S24CV Available at 6 distributors

Distributor availability ofL78S24CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2451 1 Order Now
RS COMPONENTS EUROPE 1370 10 Order Now
AVNET AMERICA 1866 0 Order Now
MOUSER WORLDWIDE 3293 1 Order Now
Farnell Element14 EUROPE 3194 1 Order Now
ANGLIA Live EUROPE 3518 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

2451

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1370

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

1866

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3293

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3194

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

3518

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.25 / 1k
L78S05CV Available at 8 distributors

Distributor availability ofL78S05CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10700 1 Order Now
RS COMPONENTS EUROPE 5847 50 Order Now
AVNET AMERICA 1133 0 Order Now
FUTURE WORLDWIDE 825 1 Order Now
Newark Element14 AMERICA 91 0 Order Now
MOUSER WORLDWIDE 2289 1 Order Now
Farnell Element14 EUROPE 5655 1 Order Now
ANGLIA Live EUROPE 6830 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

10700

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5847

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

1133

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

825

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

91

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2289

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5655

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

6830

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.25 / 1k
L78S18CV Available at 5 distributors

Distributor availability ofL78S18CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1854 1 Order Now
RS COMPONENTS EUROPE 460 10 Order Now
Newark Element14 AMERICA 118 0 Order Now
MOUSER WORLDWIDE 2044 1 Order Now
Farnell Element14 EUROPE 1488 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

1854

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

460

Min.Order

10

Region

EUROPE Order Now

Newark Element14

Stock

118

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2044

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1488

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.252 / 1k
L78S09CV Available at 4 distributors

Distributor availability ofL78S09CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2630 1 Order Now
RS COMPONENTS EUROPE 950 10 Order Now
MOUSER WORLDWIDE 4461 1 Order Now
Farnell Element14 EUROPE 3687 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

2630

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

950

Min.Order

10

Region

EUROPE Order Now

MOUSER

Stock

4461

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3687

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.25 / 1k
L78S15CV Available at 4 distributors

Distributor availability ofL78S15CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 557 1 Order Now
MOUSER WORLDWIDE 3043 1 Order Now
Farnell Element14 EUROPE 2005 1 Order Now
ANGLIA Live EUROPE 534 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

557

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3043

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2005

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

534

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.25 / 1k
L78S12CV Available at 7 distributors

Distributor availability ofL78S12CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12486 1 Order Now
RS COMPONENTS EUROPE 3089 50 Order Now
AVNET AMERICA 984 0 Order Now
FUTURE WORLDWIDE 5229 1 Order Now
MOUSER WORLDWIDE 8155 1 Order Now
Farnell Element14 EUROPE 6994 1 Order Now
ANGLIA Live EUROPE 3669 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

12486

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3089

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

984

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

5229

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

8155

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6994

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

3669

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.25 / 1k

L78S75CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.259 / 1k

Distributor availability ofL78S75CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1233 1 Order Now
RS COMPONENTS EUROPE 1239 10 Order Now
MOUSER WORLDWIDE 1790 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

1233

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1239

Min.Order

10

Region

EUROPE Order Now

MOUSER

Stock

1790

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.259 / 1k

Country of Origin

CHINA

L78S10CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.252 / 1k

Distributor availability ofL78S10CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3508 1 Order Now
RS COMPONENTS EUROPE 3790 50 Order Now
AVNET AMERICA 3000 0 Order Now
Newark Element14 AMERICA 34 0 Order Now
MOUSER WORLDWIDE 3678 1 Order Now
Farnell Element14 EUROPE 3739 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

3508

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3790

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

34

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3678

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3739

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.252 / 1k

Country of Origin

CHINA

L78S24CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.25 / 1k

Distributor availability ofL78S24CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2451 1 Order Now
RS COMPONENTS EUROPE 1370 10 Order Now
AVNET AMERICA 1866 0 Order Now
MOUSER WORLDWIDE 3293 1 Order Now
Farnell Element14 EUROPE 3194 1 Order Now
ANGLIA Live EUROPE 3518 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

2451

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1370

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

1866

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3293

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3194

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

3518

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.25 / 1k

Country of Origin

CHINA

L78S05CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.25 / 1k

Distributor availability ofL78S05CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10700 1 Order Now
RS COMPONENTS EUROPE 5847 50 Order Now
AVNET AMERICA 1133 0 Order Now
FUTURE WORLDWIDE 825 1 Order Now
Newark Element14 AMERICA 91 0 Order Now
MOUSER WORLDWIDE 2289 1 Order Now
Farnell Element14 EUROPE 5655 1 Order Now
ANGLIA Live EUROPE 6830 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

10700

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5847

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

1133

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

825

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

91

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2289

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5655

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

6830

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.25 / 1k

Country of Origin

CHINA

L78S18CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.252 / 1k

Distributor availability ofL78S18CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1854 1 Order Now
RS COMPONENTS EUROPE 460 10 Order Now
Newark Element14 AMERICA 118 0 Order Now
MOUSER WORLDWIDE 2044 1 Order Now
Farnell Element14 EUROPE 1488 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

1854

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

460

Min.Order

10

Region

EUROPE Order Now

Newark Element14

Stock

118

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2044

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1488

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.252 / 1k

Country of Origin

CHINA

L78S09CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.25 / 1k

Distributor availability ofL78S09CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2630 1 Order Now
RS COMPONENTS EUROPE 950 10 Order Now
MOUSER WORLDWIDE 4461 1 Order Now
Farnell Element14 EUROPE 3687 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

2630

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

950

Min.Order

10

Region

EUROPE Order Now

MOUSER

Stock

4461

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3687

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.25 / 1k

Country of Origin

CHINA

L78S15CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.25 / 1k

Distributor availability ofL78S15CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 557 1 Order Now
MOUSER WORLDWIDE 3043 1 Order Now
Farnell Element14 EUROPE 2005 1 Order Now
ANGLIA Live EUROPE 534 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

557

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3043

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2005

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

534

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.25 / 1k

Country of Origin

CHINA

L78S12CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.25 / 1k

Distributor availability ofL78S12CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12486 1 Order Now
RS COMPONENTS EUROPE 3089 50 Order Now
AVNET AMERICA 984 0 Order Now
FUTURE WORLDWIDE 5229 1 Order Now
MOUSER WORLDWIDE 8155 1 Order Now
Farnell Element14 EUROPE 6994 1 Order Now
ANGLIA Live EUROPE 3669 1 Order Now

Distributor reported inventory date: 2021-04-16

Distributor Name

DIGIKEY

Stock

12486

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3089

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

984

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

5229

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

8155

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6994

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

3669

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-04-16

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.25 / 1k

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