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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1A TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.3V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：80dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The LD1117AV18 is a low-dropout positive voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 1.8 V with an output current capability up to 1 A. The device operates within an input voltage range of 3.3 V to 15 V and features a typical dropout voltage of 1.15 V at full load. It includes internal thermal overload protection and short-circuit current limiting. The component is available in surface-mount packages such as SOT-223, DPAK, and TO-220, ensuring stability with a minimum 10 μF output capacitor.
Feature Summary
- Fixed 1.8 V output voltage with high accuracy
- Internal thermal and current limiting protection
- Low quiescent current consumption
- High power supply rejection ratio
Applications
- Portable battery-powered equipment
- Post-regulation for switching regulators
- Embedded system power supplies
Procurement Notes
Verify the specific suffix (e.g., TR) for tape-and-reel packaging requirements against your assembly line specifications. Confirm RoHS compliance status via the manufacturer's official datasheet before finalizing procurement. Ensure the selected package variant matches your PCB footprint design constraints.
Selection Notes
Select this component when a stable 1.8 V rail is required for digital logic or analog circuits. Consider the thermal dissipation capabilities of the chosen package relative to the expected load current and ambient temperature conditions. Verify that the input voltage remains sufficiently above the output voltage to maintain regulation under all operating conditions.
Part Context
This part belongs to the LD1117 family of low-dropout linear regulators known for their simplicity and robustness. The 'A' designation typically indicates improved performance characteristics compared to standard versions, such as tighter voltage tolerance and enhanced thermal management. It serves as a direct replacement for older LDO designs requiring higher efficiency and lower noise.
Replacement Considerations
Direct pin-compatible alternatives include the LD1117S18CTR and LD1117ASTR. Verify that substitute parts meet the same electrical specifications and package dimensions to ensure seamless integration without redesigning the printed circuit board.
