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Product Detailed Parameters
- Description：IC REG LINEAR 5V 300MA 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)：6V
- Voltage - Output (Min/Fixed)：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 LDS3985M50R is a low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 5V with a maximum continuous output current of 300mA. The device operates within an input voltage range up to 6V and features a typical dropout voltage of 0.15V at full load, with a maximum specified dropout of 0.25V. It incorporates shutdown control functionality and includes protection against overcurrent and thermal overload. The component is housed in a compact SOT-23-5 surface-mount package.
Feature Summary
- Fixed 5V output capability for stable power supply applications
- Integrated shutdown pin for system power management
- Built-in thermal and current limiting protection mechanisms
Applications
- Portable electronic devices requiring low-noise regulation
- Battery-powered systems needing efficient power management
- Embedded circuits utilizing the LDS3985 family architecture
Procurement Notes
Verify the specific suffix 'M50R' against official STMicroelectronics documentation to confirm the exact output voltage and packaging variant. Ensure compatibility with existing PCB footprints for the SOT-23-5 package. Confirm that the fixed 5V output aligns with target circuit requirements before procurement.
Selection Notes
Select this component when a fixed 5V rail is required from inputs up to 6V. Consider the 300mA current limit and SOT-23-5 thermal constraints. Verify that the shutdown feature meets system power-down needs. Compare against other LDS3985 variants if different output voltages or packages are preferred.
Part Context
This part belongs to the LDS3985 series of ultra-low noise LDO regulators designed for portable electronics. The series offers various fixed output voltages and packages. The M50R designation specifically indicates the 5V output version in the SOT-23-5 package, sharing core performance characteristics with other members of the family.
Replacement Considerations
Check for direct substitutes within the LDS3985 family offering different voltages or packages. Verify pin-to-pin compatibility if replacing with other manufacturers' LDOs. Ensure equivalent dropout voltage and current capabilities match the original design specifications.
