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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 200MA 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)：0.5V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：250 µA
- Current - Supply (Max)：-
- PSRR：55dB (400Hz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°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 LK112SM33TR is a low-dropout linear voltage regulator manufactured by STMicroelectronics, providing a fixed 3.3 V output with a maximum current capacity of 200 mA. It operates within an input voltage range of 2.5 V to 14 V and features a maximum dropout voltage of 500 mV at full load. The device maintains a quiescent current of 250 μA in the ON state and reduces to 0.1 μA in OFF mode. It offers a voltage regulation accuracy of ±2% at 25 °C and supports an operating temperature range from -40 °C to +125 °C.
Feature Summary
- Integrated shutdown function controllable via TTL or CMOS logic levels for power management
- Noise bypass pin allows external capacitor connection to reduce output noise
- Internal protection mechanisms include current limiting and thermal shutdown
Applications
- Industrial equipment requiring stable low-noise power supplies
- Battery-powered devices utilizing shutdown modes for energy efficiency
- Embedded systems needing precise voltage regulation within industrial temperature ranges
Procurement Notes
Verify the specific suffix 'SM' against official datasheets to confirm the 3.3 V fixed output variant. Ensure the SOT-23-5L package matches design constraints. Confirm RoHS compliance status through Ecopack2 documentation before finalizing procurement orders.
Selection Notes
Select this component when a fixed 3.3 V rail is required with minimal quiescent consumption. The shutdown feature makes it suitable for applications demanding active power control. Verify that the input voltage remains within the specified limits relative to the output voltage for proper regulation.
Part Context
This part belongs to the LK112S series of low-dropout regulators designed for industrial applications. The series emphasizes low noise and efficient power management through integrated shutdown capabilities. It serves as a key component in power management integrated circuits (PMIC) for stabilizing supply voltages in sensitive electronic systems.
Replacement Considerations
Check for other LK112S variants with different output voltages if system requirements change. Verify pin compatibility with alternative SOT-23-5L regulators before substitution.
