LK112

Active
Design Win

Low noise and low drop voltage regulator with shutdown function

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Product overview

Description

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.
  • All 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)

EDA Symbols, Footprints and 3D Models

STMicroelectronics - LK112

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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**
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

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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$)*/Qty
Output Tolerance (typ)
Output Current (A) (nom)
Unit Price (US$)
Country of Origin
min
max
LK112M33TR Available at 5 distributors

Distributor availability ofLK112M33TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 37229 1 Buy from Distributor
YOSUN ASIA/PACIFIC 2500 1 Buy from Distributor
COMPEL EUROPE 220 1 Buy from Distributor
MOUSER WORLDWIDE 32659 1 Buy from Distributor
Farnell Element14 EUROPE 14465 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

37229

Min.Order

1

Region

WORLDWIDE Buy from Distributor

YOSUN

Stock

2500

Min.Order

1

Region

ASIA/PACIFIC Buy from Distributor

COMPEL

Stock

220

Min.Order

1

MOUSER

Stock

32659

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

14465

Min.Order

1

Distributor reported inventory date: 2022-08-07

Active
EAR99 NEC Tape and Reel SOT23-5L -40 125 3.3

2

0.15

0.2454

CHINA

LK112M50TR Available at 3 distributors

Distributor availability ofLK112M50TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 26641 1 Buy from Distributor
MOUSER WORLDWIDE 2049 1 Buy from Distributor
Farnell Element14 EUROPE 5584 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

26641

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

2049

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

5584

Min.Order

1

Distributor reported inventory date: 2022-08-07

Active
EAR99 NEC Tape and Reel SOT23-5L -40 125 5

2

0.15

0.2454

CHINA

LK112M80TR Available at 5 distributors

Distributor availability ofLK112M80TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 16934 1 Buy from Distributor
RS COMPONENTS EUROPE 5900 1 Buy from Distributor
AVNET AMERICA 3000 0 Buy from Distributor
MOUSER WORLDWIDE 3452 1 Buy from Distributor
Farnell Element14 EUROPE 3753 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

16934

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

5900

Min.Order

1

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

3452

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

3753

Min.Order

1

Distributor reported inventory date: 2022-08-07

Active
EAR99 NEC Tape and Reel SOT23-5L -40 125 8

2

0.15

0.2454

CHINA

LK112M60TR Available at 2 distributors

Distributor availability ofLK112M60TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 5850 1 Buy from Distributor
Farnell Element14 EUROPE 8732 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

MOUSER

Stock

5850

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

8732

Min.Order

1

Distributor reported inventory date: 2022-08-07

Active
EAR99 NEC Tape and Reel SOT23-5L -40 125 6

2

0.15

0.2342

CHINA

LK112M15TR Available at 2 distributors

Distributor availability ofLK112M15TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 20630 1 Buy from Distributor
MOUSER WORLDWIDE 4687 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

20630

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

4687

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-07

Active
EAR99 NEC Tape and Reel SOT23-5L -40 125 1.5

2

0.15

0.2454

MALAYSIA

LK112M25TR Available at 2 distributors

Distributor availability ofLK112M25TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1920 1 Buy from Distributor
MOUSER WORLDWIDE 1631 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

1920

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

1631

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-07

Active
EAR99 NEC Tape and Reel SOT23-5L -40 125 2.5

2

0.15

0.2454

CHINA

LK112M18TR Available at 4 distributors

Distributor availability ofLK112M18TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3000 1 Buy from Distributor
AVNET AMERICA 3000 0 Buy from Distributor
MOUSER WORLDWIDE 4620 1 Buy from Distributor
Farnell Element14 EUROPE 5832 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

3000

Min.Order

1

Region

WORLDWIDE Buy from Distributor

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

4620

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

5832

Min.Order

1

Distributor reported inventory date: 2022-08-07

Active
EAR99 NEC Tape and Reel SOT23-5L -40 125 1.8

2

0.15

0.2342

CHINA

LK112M33TR Active

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

Part Number:

LK112M33TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Country of Origin:

CHINA

Distributor availability ofLK112M33TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 37229 1 Buy from Distributor
YOSUN ASIA/PACIFIC 2500 1 Buy from Distributor
COMPEL EUROPE 220 1 Buy from Distributor
MOUSER WORLDWIDE 32659 1 Buy from Distributor
Farnell Element14 EUROPE 14465 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

37229

Min.Order

1

Region

WORLDWIDE Buy from Distributor

YOSUN

Stock

2500

Min.Order

1

Region

ASIA/PACIFIC Buy from Distributor

COMPEL

Stock

220

Min.Order

1

MOUSER

Stock

32659

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

14465

Min.Order

1

Distributor reported inventory date: 2022-08-07

LK112M50TR Active

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

Part Number:

LK112M50TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

5

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Country of Origin:

CHINA

Distributor availability ofLK112M50TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 26641 1 Buy from Distributor
MOUSER WORLDWIDE 2049 1 Buy from Distributor
Farnell Element14 EUROPE 5584 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

26641

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

2049

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

5584

Min.Order

1

Distributor reported inventory date: 2022-08-07

LK112M80TR Active

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

Part Number:

LK112M80TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

8

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Country of Origin:

CHINA

Distributor availability ofLK112M80TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 16934 1 Buy from Distributor
RS COMPONENTS EUROPE 5900 1 Buy from Distributor
AVNET AMERICA 3000 0 Buy from Distributor
MOUSER WORLDWIDE 3452 1 Buy from Distributor
Farnell Element14 EUROPE 3753 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

16934

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

5900

Min.Order

1

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

3452

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

3753

Min.Order

1

Distributor reported inventory date: 2022-08-07

LK112M60TR Active

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

Part Number:

LK112M60TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

6

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Country of Origin:

CHINA

Distributor availability ofLK112M60TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 5850 1 Buy from Distributor
Farnell Element14 EUROPE 8732 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

MOUSER

Stock

5850

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

8732

Min.Order

1

Distributor reported inventory date: 2022-08-07

LK112M15TR Active

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

Part Number:

LK112M15TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

1.5

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Country of Origin:

MALAYSIA

Distributor availability ofLK112M15TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 20630 1 Buy from Distributor
MOUSER WORLDWIDE 4687 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

20630

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

4687

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-07

LK112M25TR Active

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

Part Number:

LK112M25TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

2.5

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Country of Origin:

CHINA

Distributor availability ofLK112M25TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1920 1 Buy from Distributor
MOUSER WORLDWIDE 1631 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

1920

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

1631

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-07

LK112M18TR Active

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

Part Number:

LK112M18TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

125

Output Voltage (V) (nom):

1.8

Output Tolerance (typ):

2

Output Current (A) (nom):

0.15

Country of Origin:

CHINA

Distributor availability ofLK112M18TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3000 1 Buy from Distributor
AVNET AMERICA 3000 0 Buy from Distributor
MOUSER WORLDWIDE 4620 1 Buy from Distributor
Farnell Element14 EUROPE 5832 1 Buy from Distributor

Distributor reported inventory date: 2022-08-07

Distributor Name

DIGIKEY

Stock

3000

Min.Order

1

Region

WORLDWIDE Buy from Distributor

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

4620

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

5832

Min.Order

1

Distributor reported inventory date: 2022-08-07

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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