LK112S

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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)

EDA Symbols, Footprints and 3D Models

STMicroelectronics - LK112S

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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**:

PDF XML

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**:

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
Marketing Status
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Package
Packing Type
RoHS
Country of Origin
ECCN (US)
ECCN (EU)
Operating temperature (°C)
Grade
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
min
max
LK112SM50TR
Available at distributors

Distributor availability of LK112SM50TR

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LK112SM18TR
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Distributor availability of LK112SM18TR

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LK112SM33TR
Available at distributors

Distributor availability of LK112SM33TR

Distributor Name
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Distributor reported inventory date:

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LK112SM50TR Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LK112SM50TR

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

5

Output Tolerance (typ):

2

Output Current (A) (nom):

0.2

Distributor Name

Distributor reported inventory date:

LK112SM18TR Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LK112SM18TR

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

1.8

Output Tolerance (typ):

2

Output Current (A) (nom):

0.2

Distributor Name

Distributor reported inventory date:

LK112SM33TR Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LK112SM33TR

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

2

Output Current (A) (nom):

0.2

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