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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 150MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.35V @ 150mA
- Current - Output：150mA
- Current - Quiescent (Iq)：250 µA
- Current - Supply (Max)：-
- PSRR：55dB (400Hz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-30°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LK112M33TR is a low-dropout linear voltage regulator manufactured by STMicroelectronics, featuring an integrated shutdown function. It provides a fixed 3.3V output with a maximum current capacity of 200 mA. The device operates within an industrial temperature range from -40°C to +125°C and utilizes a SOT-23-5L package. Key electrical specifications include a maximum dropout voltage of 500 mV at full load, a quiescent current of 250 μA in the ON state, and a typical output noise of 30 μV. The input voltage range extends from VOUT + 0.5 V up to 14 V.
Feature Summary
- Integrated shutdown capability controlled by TTL or CMOS logic levels for power management
- Low output noise performance suitable for sensitive analog circuits
- Built-in thermal and current limiting protection mechanisms
Applications
- Battery-powered portable electronic devices requiring efficient power regulation
- Industrial control systems operating in wide temperature environments
- Embedded sensor interfaces needing stable low-noise supply voltages
Procurement Notes
Verify the specific suffix 'M33' confirms the 3.3V fixed output variant during sourcing. Confirm the 'TR' designation indicates tape and reel packaging for automated assembly processes. Ensure the component grade matches the required industrial specifications for your application environment.
Selection Notes
Select this component when a fixed 3.3V rail is required with minimal external components. Consider the low quiescent current for battery life optimization. Evaluate the SOT-23-5L package constraints against available PCB space and thermal dissipation requirements for the target load current.
Part Context
This part belongs to the LK112S family of low-dropout regulators designed for industrial applications. The series offers various fixed output voltages and maintains consistent performance characteristics across the lineup. It serves as a compact power management solution for space-constrained designs.
Replacement Considerations
Check for direct pin-compatible alternatives within the same LK112S family offering different voltage outputs if system requirements change. Verify that any substitute maintains the same shutdown logic interface and package footprint.
