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Product Detailed Parameters
- Description：IC REG LINEAR 5V 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)：5V
- 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 LK112SM50TR is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics, providing a stable 5V output with a maximum current capacity of 150mA. It operates within an input voltage range of 5.5V to 14V and features a maximum dropout voltage of 0.35V at full load. The device incorporates internal thermal shutdown and overcurrent protection mechanisms. It is housed in a compact SOT-23-5 surface-mount package and supports an industrial operating temperature range from -30°C to +125°C.
Feature Summary
- Integrated shutdown control compatible with TTL or CMOS logic levels for power management
- Internal current limiting and thermal protection circuits ensure operational safety under fault conditions
- Low quiescent current consumption enhances efficiency in battery-powered applications
Applications
- Portable electronic devices requiring efficient voltage regulation
- Industrial control systems operating in wide temperature environments
- Battery-powered equipment utilizing linear regulation stages
Procurement Notes
Verify the specific suffix 'M' indicates the 150mA variant distinct from other series members. Confirm the SOT-23-5 package type matches the target PCB footprint. Ensure the fixed 5V output aligns with system requirements. Check RoHS compliance status for environmental regulations. Validate the industrial temperature grade suitability for the intended operating environment.
Selection Notes
Select this component when a fixed 5V rail is required with moderate current demands up to 150mA. The SOT-23-5 package offers space savings compared to larger regulators. Consider the 150mA limit against peak load currents to prevent triggering internal protection. The shutdown pin allows for system-level power sequencing. Verify input voltage stability remains within the specified 5.5V to 14V window.
Part Context
This part belongs to the LK112S family of low-noise, low-dropout linear regulators featuring shutdown functionality. The family provides various fixed output voltages optimized for portable and industrial electronics. The LK112SM50TR specifically delivers 5V, distinguishing it from lower voltage variants like the 1.8V or 3.3V versions while sharing the same core architecture and protection features.
Replacement Considerations
Direct substitutes include other LK112S family members with identical packages if voltage tolerance permits, such as LK112SM33TR for 3.3V applications. Cross-reference with generic SOT-23-5 LDOs only if electrical parameters like dropout voltage and current limits are strictly comparable.
