LK112S

Active
Design Win

Low noise and low drop voltage regulator with shutdown function

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Product overview

Description

The LK112S is a low-dropout linear regulator with shutdown function. The internal switch can be controlled by TTL or CMOS logic levels. The device is ON when the control pin is pulled to a high logic 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 LK112S has a very low quiescent current in ON mode while in OFF mode the Iqis reduced to 100 nA max. The internal thermal shutdown circuitry limits the junction temperature below 150 °C. The load current is internally monitored and in the presence of a short-circuit or overcurrent conditions at the output, the device shuts down.
  • All features

    • Output current up to 200 mA
    • Low-dropout voltage (500 mV max. at IOUT = 200 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
    • VOUT tolerance ± 2% (at 25 °C)
    • 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)

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      AP350/SG5000 Automatic Programming System

      Active

      Automatic programmers for STM MCUs series & PMUs

      Hardware Development Tools from Partners System General
      AP350/SG5000 Automatic Programming System

      Description:

      Automatic programmers for STM MCUs series & PMUs

      T9800/SG8000 Device Programmer

      Active

      Universal programmers for STM MCUs series & PMUs

      Hardware Development Tools from Partners System General
      T9800/SG8000 Device Programmer

      Description:

      Universal programmers for STM MCUs series & PMUs

EDA Symbols, Footprints and 3D Models

STMicroelectronics - LK112S

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.

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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**
LK112SM18TR
Active
SOT23-5L Industrial Ecopack2
LK112SM33TR
Active
SOT23-5L Industrial Ecopack2
LK112SM50TR
Active
SOT23-5L Industrial Ecopack2

LK112SM18TR

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112SM33TR

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LK112SM50TR

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
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
LK112SM50TR Available at 4 distributors

Distributor availability ofLK112SM50TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 315 1 Buy from Distributor
FUTURE WORLDWIDE 3000 3000 Buy from Distributor
MOUSER WORLDWIDE 38 1 Buy from Distributor
Farnell Element14 EUROPE 564 1 Buy from Distributor

Distributor reported inventory date: 2022-05-04

Distributor Name

RS COMPONENTS

Stock

315

Min.Order

1

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

38

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

564

Min.Order

1

Distributor reported inventory date: 2022-05-04

Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 5
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.2

Unit Price (US$):

0.3653

Country of Origin:

CHINA

LK112SM18TR Available at 2 distributors

Distributor availability ofLK112SM18TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 5492 1 Buy from Distributor
Farnell Element14 EUROPE 3227 1 Buy from Distributor

Distributor reported inventory date: 2022-05-04

Distributor Name

MOUSER

Stock

5492

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

3227

Min.Order

1

Distributor reported inventory date: 2022-05-04

Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 1.8
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.2

Unit Price (US$):

0.3487

Country of Origin:

CHINA

LK112SM33TR Available at 4 distributors

Distributor availability ofLK112SM33TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4963 1 Buy from Distributor
RS COMPONENTS EUROPE 1115 1 Buy from Distributor
MOUSER WORLDWIDE 1795 1 Buy from Distributor
Farnell Element14 EUROPE 1509 1 Buy from Distributor

Distributor reported inventory date: 2022-05-04

Distributor Name

DIGIKEY

Stock

4963

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

1115

Min.Order

1

MOUSER

Stock

1795

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1509

Min.Order

1

Distributor reported inventory date: 2022-05-04

Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3.3
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

0.2

Unit Price (US$):

0.3653

Country of Origin:

CHINA

LK112SM50TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLK112SM50TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 315 1 Buy from Distributor
FUTURE WORLDWIDE 3000 3000 Buy from Distributor
MOUSER WORLDWIDE 38 1 Buy from Distributor
Farnell Element14 EUROPE 564 1 Buy from Distributor

Distributor reported inventory date: 2022-05-04

Distributor Name

RS COMPONENTS

Stock

315

Min.Order

1

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

38

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

564

Min.Order

1

Distributor reported inventory date: 2022-05-04

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)

0.2

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

LK112SM18TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLK112SM18TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 5492 1 Buy from Distributor
Farnell Element14 EUROPE 3227 1 Buy from Distributor

Distributor reported inventory date: 2022-05-04

Distributor Name

MOUSER

Stock

5492

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

3227

Min.Order

1

Distributor reported inventory date: 2022-05-04

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)

0.2

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

LK112SM33TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLK112SM33TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4963 1 Buy from Distributor
RS COMPONENTS EUROPE 1115 1 Buy from Distributor
MOUSER WORLDWIDE 1795 1 Buy from Distributor
Farnell Element14 EUROPE 1509 1 Buy from Distributor

Distributor reported inventory date: 2022-05-04

Distributor Name

DIGIKEY

Stock

4963

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

1115

Min.Order

1

MOUSER

Stock

1795

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1509

Min.Order

1

Distributor reported inventory date: 2022-05-04

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)

0.2

Budgetary Price (US$)* / Qty

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