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Product Detailed Parameters
- Description：IC REG LINEAR 1.5V SOT-223-3L
- Series：LD1117
- Mfr：UMW
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：12V
- Voltage - Output (Min/Fixed)：1.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.3V @ 1A
- Current - Output：-
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：75dB (120Hz)
- Control Features：Current Limit
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223-3L
- Grade：-
- Qualification：-
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Overview
The UMW LD1117-1.5 is a positive low dropout regulator providing a fixed 1.5V output with less than 1.5% tolerance. It supports up to 1A output current and operates within an input voltage range of 3.0V to 12V. The device features a typical dropout voltage of 1.2V at full load, 75dB ripple rejection at 120Hz, and internal thermal shutdown and current limiting protections. It is available in SOT-223-3L, TO-252-2L, and SOT-89-3L packages.
Feature Summary
- Fixed 1.5V output with high precision accuracy
- Integrated thermal shutdown and current limiting protection
- Low dropout voltage performance for efficient power regulation
Applications
- Battery Charger
- Cellular Phone
- Portable Instrumentation
- SMPS Post-Regulator
Procurement Notes
Verify the specific package variant (SOT-223-3L, TO-252-2L, or SOT-89-3L) required for your design, as the base model number does not specify the footprint. Confirm that the 1.5V fixed version availability aligns with your production timeline, as datasheet nomenclature lists it alongside other standard voltages. Ensure input voltage conditions meet the minimum 3.0V requirement for stable operation.
Selection Notes
Select this component when a precise 1.5V rail is needed from a higher voltage source with minimal headroom. It is suitable for battery-powered systems where efficiency is critical due to the low dropout characteristic. Consider the thermal resistance of the chosen package if operating near the maximum 1A current limit to ensure junction temperature remains within safe limits.
Part Context
The LD1117 series includes multiple fixed voltage options such as 1.2V, 1.8V, 2.5V, 3.3V, and 5.0V, as well as an adjustable version. The LD1117-1.5 specifically targets applications requiring a 1.5V supply. The series is designed for general-purpose linear regulation in portable electronics and industrial instrumentation.
Replacement Considerations
LD1117-1.5 (STMicroelectronics)
FAQ
What is the minimum input voltage required for the LD1117-1.5?
The minimum input voltage is 3.0V to ensure proper regulation and stability.
Does the LD1117-1.5 include overcurrent protection?
Yes, the device features internal current limiting and thermal shutdown to protect against overload conditions.
