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Product Detailed Parameters
- Description：IC REG LINEAR 1.7V 200MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：1.7V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- 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 LK112SM17TR is a low-dropout linear regulator manufactured by STMicroelectronics, featuring a fixed 1.7 V output voltage and a maximum output current of 200 mA. It operates within an input voltage range of 2.5 V to 14 V and utilizes a SOT-23-5 surface-mount package. The device exhibits a typical quiescent current of 250 uA in ON mode and includes internal thermal shutdown and overcurrent protection mechanisms.
Feature Summary
- Integrates a shutdown function controllable via TTL or CMOS logic levels for power management
- Provides low output noise performance with provisions for external capacitor connection to the noise bypass pin
- Includes internal thermal shutdown circuitry and load current monitoring for short-circuit protection
Applications
- Battery-powered portable electronic devices requiring efficient voltage regulation
- Low-noise analog circuits sensitive to power supply fluctuations
- Embedded systems utilizing microcontrollers with specific voltage requirements
Procurement Notes
Verify the exact output voltage specification against official datasheets, as the model suffix indicates a fixed 1.7 V output distinct from other variants in the series. Confirm package integrity and RoHS compliance status through authorized distributors before procurement. Ensure compatibility with existing PCB footprints for the SOT-23-5 package.
Selection Notes
Select this component when a stable 1.7 V supply is required with minimal dropout voltage under load conditions up to 200 mA. Consider the low quiescent current for battery-operated applications where standby power consumption is critical. Evaluate the need for the shutdown feature if system-level power control is necessary.
Part Context
This part belongs to the LK112S family of low-noise low-dropout regulators designed for high-performance analog and digital applications. The series offers various fixed output voltages and incorporates advanced protection features such as thermal limiting and current limiting to ensure reliable operation across industrial temperature ranges.
Replacement Considerations
Direct substitutes include other LK112S variants with compatible packages and electrical characteristics, provided the output voltage matches the application requirement. Verify pinout compatibility and thermal performance when considering alternative manufacturers' LDO regulators.
