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Product Detailed Parameters
- Description：IC REG LINEAR 1.5V 300MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：1.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.25V @ 300mA
- Current - Output：300mA
- Current - Quiescent (Iq)：150 µA
- Current - Supply (Max)：300 µA
- PSRR：55dB ~ 50dB (1kHz ~ 10kHz)
- Control Features：Shutdown
- 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 LDS3985M15R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics. It provides a stable 1.5 V output with a maximum load current of 300 mA. The device operates within an input voltage range of 2.5 V to 6 V and maintains a typical quiescent current of 150 uA. It features a very low dropout voltage, specified as 400 uV at 1 mA load. The regulator is housed in a TSOT-23-5 surface-mount package and supports operation across a temperature range from -40 C to +125 C.
Feature Summary
- Ultra-low dropout voltage performance for efficient power management
- Low quiescent current consumption suitable for battery-powered systems
- Integrated thermal and current limiting protection mechanisms
Applications
- Portable electronic devices requiring stable low-voltage rails
- Battery-operated consumer electronics
- Embedded systems with strict power efficiency requirements
Procurement Notes
Verify the specific suffix 'M15R' to confirm the 1.5 V fixed output voltage and TSOT-23-5 packaging configuration. Ensure compatibility with the required 300 mA load current and input voltage range of 2.5 V to 6 V. Confirm RoHS compliance status and check for any specific handling instructions related to the small outline transistor package during assembly.
Selection Notes
Select this component when a fixed 1.5 V supply is needed with minimal voltage drop under light loads. It is appropriate for applications prioritizing low static current to extend battery life. Consider the thermal performance within the TSOT-23-5 package if high ambient temperatures are expected. Verify that the input voltage remains within the specified 2.5 V to 6 V limits for proper regulation.
Part Context
This part belongs to the LDS3985 series of ultra-low-dropout regulators from STMicroelectronics. The series is designed for low-noise, low-power applications where space is constrained. The M15R designation indicates the specific output voltage variant and packaging type within this family of positive polarity regulators.
Replacement Considerations
Direct substitutes include other LD3985 or LDS3985 variants with matching 1.5 V output and TSOT-23-5 packages. Verify pinout compatibility and electrical specifications such as dropout voltage and quiescent current before substitution.
