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  • The LK112 is a low-dropout linear regulator with a built-in electronic switch. The internal switch can be controlled by TTL or CMOS logic levels. The device is on-state when the control pin is pulled to a logic high level. An external capacitor can be connected to the noise bypass pin to reduce the output noise level to 30 μVrms. An internal PNP pass transistor is used to achieve a low-dropout voltage. The LK112 has a very low quiescent current in on mode while in off mode Iqis reduced below 100 nA max. The internal thermal shutdown circuitry limits the junction temperature below 150 °C. Load current is internally monitored and the device shuts down in the presence of a short-circuit or overcurrent condition on the output.

    Key Features

    • Output current up to 150 mA
    • Low-dropout voltage (350 mV at IOUT= 150 mA)
    • Very low quiescent current:
      • 0.1 μA in OFF mode and max. 250 μA in ON mode at IOUT= 0 mA
    • Low output noise:
      • typ. 30 μV at IOUT= 60 mA and 10 Hz < f < 80 kHz
    • Wide range of output voltages
    • Internal current and thermal limit
    • Operative input voltage from:
      • VOUT+ 0.5 to 14 V (for VOUT> 2 V) or from 2.5 V to 14 V (for VOUT< 2 V)

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LK112M15TR
Active
SOT23-5L Industrial Ecopack2
LK112M18TR
Active
SOT23-5L Industrial Ecopack2
LK112M25TR
Active
SOT23-5L Industrial Ecopack2
LK112M33TR
Active
SOT23-5L Industrial Ecopack2
LK112M50TR
Active
SOT23-5L Industrial Ecopack2
LK112M60TR
Active
SOT23-5L Industrial Ecopack2
LK112M80TR
Active
SOT23-5L Industrial Ecopack2

LK112M15TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112M18TR

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112M25TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112M33TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112M50TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112M60TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112M80TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

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
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Package
Temperature (°C) Output Voltage (V) (nom)
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min
max
LK112M33TR Available at 8 distributors

Distributor availability ofLK112M33TR

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DIGIKEY WORLDWIDE 11851 1 Order Now
COMPEL EUROPE 2349 1 Order Now
AVNET AMERICA 12000 0 Order Now
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MOUSER WORLDWIDE 11190 1 Order Now
Farnell Element14 EUROPE 4725 1 Order Now
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EAR99 NEC Tape And Reel SOT23-5L -40 125 3.3 0.161 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Unit Price (US$):

0.161

Country of Origin:

CHINA

LK112M50TR Available at 5 distributors

Distributor availability ofLK112M50TR

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Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5940 1 Order Now
AVNET AMERICA 6000 0 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 11900 1 Order Now
Farnell Element14 EUROPE 1255 1 Order Now

Distributor reported inventory date: 2020-10-25

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5940

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1

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6000

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0

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3000

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3000

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11900

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1255

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1

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EAR99 NEC Tape And Reel SOT23-5L -40 125 5 0.161 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Unit Price (US$):

0.161

Country of Origin:

CHINA

LK112M80TR Available at 6 distributors

Distributor availability ofLK112M80TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6183 1 Order Now
RS COMPONENTS EUROPE 2670 1 Order Now
ARROW EUROPE 3000 0 Order Now
ARROW AMERICA 9000 3000 Order Now
MOUSER WORLDWIDE 5706 1 Order Now
Farnell Element14 EUROPE 2053 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

6183

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2670

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1

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3000

Min.Order

0

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Stock

9000

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3000

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Stock

5706

Min.Order

1

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Farnell Element14

Stock

2053

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1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

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EAR99 NEC Tape And Reel SOT23-5L -40 125 8 0.161 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Unit Price (US$):

0.161

Country of Origin:

MALAYSIA

LK112M60TR Available at 5 distributors

Distributor availability ofLK112M60TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1970 1 Order Now
AVNET AMERICA 6000 0 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
MOUSER WORLDWIDE 3353 1 Order Now
Farnell Element14 EUROPE 5800 1 Order Now

Distributor reported inventory date: 2020-10-25

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RS COMPONENTS

Stock

1970

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

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Stock

3353

Min.Order

1

Region

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Farnell Element14

Stock

5800

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

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EAR99 NEC Tape And Reel SOT23-5L -40 125 6 0.161 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Unit Price (US$):

0.161

Country of Origin:

MALAYSIA

LK112M15TR Available at 2 distributors

Distributor availability ofLK112M15TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 20639 1 Order Now
MOUSER WORLDWIDE 8940 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

20639

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

8940

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-25

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Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 1.5 0.161 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Unit Price (US$):

0.161

Country of Origin:

MALAYSIA

LK112M25TR Available at 3 distributors

Distributor availability ofLK112M25TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5380 1 Order Now
MOUSER WORLDWIDE 5910 1 Order Now
RUTRONIK EUROPE 2990 3000 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

5380

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

5910

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

2990

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

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Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 2.5 0.161 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Unit Price (US$):

0.161

Country of Origin:

CHINA

LK112M18TR Available at 5 distributors

Distributor availability ofLK112M18TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5935 1 Order Now
AVNET AMERICA 3000 0 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 5857 1 Order Now
Farnell Element14 EUROPE 5884 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

5935

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

3000

Min.Order

0

Region

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Stock

3000

Min.Order

0

Region

EUROPE Order Now

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Stock

5857

Min.Order

1

Region

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Farnell Element14

Stock

5884

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

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Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 1.8 0.161 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Unit Price (US$):

0.161

Country of Origin:

CHINA

LK112M33TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.161 / 1k

Distributor availability ofLK112M33TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 11851 1 Order Now
COMPEL EUROPE 2349 1 Order Now
AVNET AMERICA 12000 0 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
ARROW AMERICA 6000 3000 Order Now
MOUSER WORLDWIDE 11190 1 Order Now
Farnell Element14 EUROPE 4725 1 Order Now
RUTRONIK EUROPE 3000 3000 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

11851

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2349

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

11190

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4725

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

3000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.161 / 1k

Country of Origin

CHINA

LK112M50TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.161 / 1k

Distributor availability ofLK112M50TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5940 1 Order Now
AVNET AMERICA 6000 0 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 11900 1 Order Now
Farnell Element14 EUROPE 1255 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

5940

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

11900

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1255

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.161 / 1k

Country of Origin

CHINA

LK112M80TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.161 / 1k

Distributor availability ofLK112M80TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6183 1 Order Now
RS COMPONENTS EUROPE 2670 1 Order Now
ARROW EUROPE 3000 0 Order Now
ARROW AMERICA 9000 3000 Order Now
MOUSER WORLDWIDE 5706 1 Order Now
Farnell Element14 EUROPE 2053 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

6183

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2670

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

9000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

5706

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2053

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

8

Output Tolerance (typ)

2

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.161 / 1k

Country of Origin

MALAYSIA

LK112M60TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.161 / 1k

Distributor availability ofLK112M60TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1970 1 Order Now
AVNET AMERICA 6000 0 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
MOUSER WORLDWIDE 3353 1 Order Now
Farnell Element14 EUROPE 5800 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

RS COMPONENTS

Stock

1970

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

MOUSER

Stock

3353

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5800

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

6

Output Tolerance (typ)

2

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.161 / 1k

Country of Origin

MALAYSIA

LK112M15TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.161 / 1k

Distributor availability ofLK112M15TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 20639 1 Order Now
MOUSER WORLDWIDE 8940 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

20639

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

8940

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.161 / 1k

Country of Origin

MALAYSIA

LK112M25TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.161 / 1k

Distributor availability ofLK112M25TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5380 1 Order Now
MOUSER WORLDWIDE 5910 1 Order Now
RUTRONIK EUROPE 2990 3000 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

5380

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

5910

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

2990

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.161 / 1k

Country of Origin

CHINA

LK112M18TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.161 / 1k

Distributor availability ofLK112M18TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5935 1 Order Now
AVNET AMERICA 3000 0 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 5857 1 Order Now
Farnell Element14 EUROPE 5884 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

DIGIKEY

Stock

5935

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

5857

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5884

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

2

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.161 / 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