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Product Detailed Parameters
- Description：IC REG LINEAR 1.5V 1.35A SOT-223
- Series：-
- Mfr：Diotec Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.5V
- Voltage - Output (Max)：-
- 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 Diotec Semiconductor LDI1117-1.5H is a fixed-output Low Dropout (LDO) linear voltage regulator housed in a SOT-223 surface-mount package. It provides a nominal output voltage of 1.5V with a maximum tolerance of 1%. The device supports a continuous output current of 1.35A and accepts input voltages up to 15V. Key electrical specifications include a maximum dropout voltage of 1.25V at full load, a typical power supply rejection ratio (PSRR) of 50 dB, and a quiescent current of 10 mA. It operates within a junction temperature range of -40°C to +125°C.
Feature Summary
- Fixed 1.5V output with 1% tolerance for precise voltage regulation
- Integrated thermal overload and current limit protection mechanisms
- High ripple rejection capability via internal compensation
- RoHS compliant construction suitable for automated surface mount assembly
Applications
- Portable battery-powered equipment requiring stable low-voltage rails
- Embedded systems and microcontroller power supplies
- General-purpose linear regulation in consumer electronics
- Industrial control modules needing isolated or regulated DC sources
Procurement Notes
Verify the specific suffix 'H' corresponds to the SOT-223 package variant when sourcing. Confirm RoHS3 compliance status through official manufacturer documentation prior to integration. Ensure PCB footprint matches TO-261AA/TO-261-4 dimensions. Check moisture sensitivity level (MSL 3) requirements for storage and reflow soldering profiles.
Selection Notes
Select this component when a fixed 1.5V rail is required with high current capacity up to 1.35A. The SOT-223 package offers improved thermal dissipation compared to smaller SMD packages. Consider the 15V maximum input rating and 1.25V dropout voltage for headroom calculations. Verify that the 10mA quiescent current aligns with system power budget constraints.
Part Context
Part of the LDI1117 series from Diotec Semiconductor, designed as a drop-in replacement for popular industry-standard adjustable regulators configured for fixed outputs. The series includes various voltage options and package types like SOT-89. This specific model targets applications needing robust linear regulation in compact form factors.
Replacement Considerations
Cross-reference with other LDI1117 variants for different voltage outputs. Verify pinout compatibility if substituting with generic 1117-series regulators from other manufacturers. Ensure thermal performance meets design requirements given the SOT-223 package limitations.
