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Product Detailed Parameters
- Description：IC REG LINEAR 5V 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)：5V
- 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 LK112M50TR is a low-dropout linear regulator from the LK112S series, manufactured by STMicroelectronics. It provides a fixed 5V output with a maximum load current of 200mA. The device operates within an input voltage range of 5.5V to 14V and features a shutdown function controlled by TTL or CMOS logic levels. Key electrical characteristics include a maximum dropout voltage of 500mV at full load, a typical output noise of 30μVrms, and a quiescent current of 250μA in ON mode. It is housed in a surface-mount SOT-23-5 package.
Feature Summary
- Integrated shutdown function allowing control via standard logic levels
- Low output noise capability with external bypass pin support
- Internal thermal and overcurrent protection mechanisms
Applications
- Battery-powered portable devices requiring low standby current
- Noise-sensitive analog circuits needing clean power rails
- Embedded systems utilizing logic-controlled power management
Procurement Notes
Verify the specific suffix 'M' against official STMicroelectronics documentation to confirm it denotes the tape-and-reel packaging format for this part number. Ensure compatibility with the SOT-23-5 footprint during procurement planning. Cross-reference the exact ordering code with manufacturer catalogs to avoid confusion with similar variants in the LK112 family.
Selection Notes
Select this component when a fixed 5V rail is required with minimal dropout voltage under moderate loads. The inclusion of a shutdown pin makes it suitable for applications where power conservation is critical during idle states. Consider the SOT-23-5 package constraints regarding thermal dissipation and board space availability.
Part Context
This component belongs to the LK112S family of low-noise LDO regulators. The family is characterized by high PSRR and low quiescent current, designed for precision analog applications. The LK112M50TR specifically offers the 5V output variant within this lineup, sharing common internal architectures like PNP pass transistors and protection circuits found across the series.
Replacement Considerations
Direct substitutes within the same package and specification may include other LK112S variants with different output voltages if system design allows adjustment. Verify pin-out compatibility before considering cross-brand alternatives.
