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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 1.35A SOT-223
- Series：-
- Mfr：Diotec Semiconductor
- Package：Bulk
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：13.65V
- Voltage Dropout (Max)：1.25V @ 1A
- Current - Output：1.35A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：-
- 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
- Grade：-
- Qualification：-
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Overview
The LDI1117-ADH is a positive adjustable linear voltage regulator from Diotec Semiconductor, housed in an SOT-223 surface-mount package. It delivers an output current of 1.35A with an input voltage range up to 20V and an adjustable output voltage spanning 1.25V to 13.65V. The device features a maximum dropout voltage of 1.15V at full load, ensuring efficient performance under varying conditions. Integrated protection mechanisms include thermal shutdown and current limiting to safeguard against overload scenarios.
Feature Summary
- Adjustable output voltage capability across a wide operational range
- Integrated thermal shutdown and current limiting protection circuits
- Low dropout voltage design for enhanced efficiency
- Surface-mount SOT-223 packaging for compact integration
Applications
- Battery-powered equipment requiring stable regulation
- Post-regulators for switching power supplies
- On-card regulation for distributed power systems
Procurement Notes
Verify the specific manufacturer datasheet for the LDI1117-ADH to confirm exact electrical tolerances and thermal characteristics. Ensure compatibility with the target PCB footprint for the SOT-223 package. Confirm that the application environment stays within the specified operating temperature range and input voltage limits to maintain regulatory stability and device safety.
Selection Notes
Select this component when an adjustable output voltage is required alongside high current capacity in a compact form factor. The SOT-223 package suits applications with space constraints. Consider the dropout voltage specifications relative to the minimum input voltage available in the system to ensure proper regulation under all load conditions.
Part Context
This part belongs to the LDI1117 series of low-dropout regulators manufactured by Diotec Semiconductor. The series includes fixed voltage variants such as LDI1117-1.2H and LDI1117-1.5H, which offer preset outputs. The ADH suffix specifically denotes the adjustable version, providing flexibility for custom voltage requirements compared to the fixed-output counterparts.
Replacement Considerations
Compatible substitutes include other 1A adjustable LDOs in SOT-223 packages, such as the LM317 or LT1086-ADJ. Verify pinout compatibility and thermal dissipation requirements before substitution. Ensure the replacement device meets the same input voltage and current specifications.
