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LK112SM33TR The STMicroelectronics LK112SM33TR is a linear voltage regulator IC. It provides a fixed 3.3V output at up to 200mA current.
Mfr Part #:

LK112SM33TR

Available from 3 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics LK112SM33TR is a linear voltage regulator IC. It provides a fixed 3.3V output at up to 200mA current.
✓ Total Stock: 9,339 pcs
$ Price Range: $0.28

LK112SM33TR Available from 3 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Risen Electronics ✓
Non-Authorised Inventory information
6,000 pcs
On Request
6000 pcs On Request 1 On Request On Request On Request On Request 2026-02-16 21:33:16
Partservice ✓
Non-Authorised Inventory information
2,339 pcs
On Request
2339 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
1,000 pcs
On Request
1000 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

LK112SM33TR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Control Features
Current
Input Voltage
Mounting Type
Number of Regulators
Operating Temperature
Output Configuration
Output Current
Output Type
Output Voltage
PSRR
Protection Features
Quiescent Current
SVHC Present
Supplier Device Package
Voltage
Voltage Dropout (Max)
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LK112SM33TR Description

Short technical summary and product information.

The STMicroelectronics LK112SM33TR is a positive fixed output linear voltage regulator designed for power management applications. It offers a stable 3.3V output voltage with a maximum output current of 200mA. The regulator features a low dropout voltage of 0.5V at 200mA and a quiescent current of 250 µA, making it suitable for power-sensitive designs.

 

This device operates with an input voltage range up to 14V and includes protection features such as over current and over temperature protection. The LK112SM33TR is available in a compact SOT-23-5 surface mount package, facilitating integration into space-constrained electronic circuits. Its PSRR of 55dB at 400Hz helps in filtering noise from the power supply.

 

Key electrical characteristics include a 3.3V fixed output, 200mA output current capability, and a 0.5V maximum dropout voltage at full load. The operating temperature range is from -40°C to 125°C. The regulator is controlled via an Enable pin, offering flexibility in power sequencing.

 

The LK112SM33TR is packaged in Cut Tape (CT) & Digi-Reel® for surface mounting. Its RoHS3 compliant status and Moisture Sensitivity Level 1 rating are important considerations for manufacturing and assembly processes.

LK112SM33TR Quick Information

Product Type: Linear Voltage Regulator
Series: LK112
Canonical Name: STMicroelectronics LK112SM33TR Linear Voltage Regulator
Subcategory: Linear Voltage Regulator

LK112SM33TR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

LK112SM33TR Estimated Pricing

Qty Low High
1+ $0.28 $0.28

Estimated market price range - modelled values for guidance only, not live distributor offers.

LK112SM33TR Features

  • Fixed 3.3V positive output voltage.
  • 200mA maximum output current.
  • Low 0.5V dropout voltage.
  • SOT-23-5 surface mount package.
  • Over current and over temperature protection.

LK112SM33TR Applications

  • Battery-powered portable devices.
  • Industrial sensor modules.
  • Embedded microcontroller supplies.
  • Consumer electronics power rails.
  • Communication equipment bias.

LK112SM33TR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the output voltage of the LK112SM33TR?

The fixed output voltage is 3.3V.

What is the maximum input voltage?

Maximum input voltage is 14V.

What is the output current capability?

Up to 200mA.

What is the dropout voltage?

Maximum dropout voltage is 0.5V at 200mA load.

What is the quiescent current?

250µA.

What is the operating temperature range?

-40°C to 125°C.

What package is the LK112SM33TR available in?

SOT-23-5 (also SC-74A, SOT-753).

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