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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 1A SOT-223-3
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：16.6V
- Voltage Dropout (Max)：1.4V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：70dB (120Hz)
- Control Features：Current Limit
- Protection Features：Over Current, Over Temperature, Transient Voltage
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223-3
- Grade：-
- Qualification：-
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Overview
The LA1117AADBADJ is a positive adjustable linear voltage regulator manufactured by Diodes Incorporated. It provides a single output with a current capability of 1A. The device operates within an input voltage range supporting outputs from 1.25V to 16.6V. Key electrical parameters include a low quiescent current consumption of 10mA. The component features integrated protection mechanisms for over current, over temperature, and transient voltage conditions. It is designed for surface mount installation in a SOT-223-3 package. The junction temperature operating range extends from -40°C to 125°C.
Feature Summary
- Positive adjustable output voltage regulation
- Integrated over current and over temperature protection
- Low quiescent current consumption design
Applications
- General purpose linear power supply regulation
- Battery-powered equipment power management
- Consumer electronics voltage conditioning
Procurement Notes
This component is officially classified as obsolete and no longer manufactured by Diodes Incorporated. Procurement should focus on verified substitute part numbers such as the AZ1117CH-ADJTRG1. Buyers must confirm availability through authorized distributors or secondary markets, as direct new production inventory is unavailable. Verify datasheet revisions and pin compatibility when sourcing replacements.
Selection Notes
Select this component only if legacy compatibility with the SOT-223-3 package and 1A current rating is required. Consider the AZ1117 series as the primary modern alternative due to identical functional specifications. Evaluate thermal performance requirements given the 125°C junction limit. Ensure input voltage headroom supports the desired adjustable output range between 1.25V and 16.6V.
Part Context
The LA1117AADBADJ belongs to the LM1117/LM317 family of adjustable linear regulators produced by Diodes Incorporated. It serves as a cost-effective solution for step-down voltage conversion in portable and fixed applications. The device is categorized under PMIC linear regulators. Its discontinuation reflects industry shifts toward newer generation components with improved efficiency or packaging options.
Replacement Considerations
The AZ1117CH-ADJTRG1 is a confirmed public substitute recommended by the manufacturer. Both parts share the same adjustable functionality and current capabilities. Verify that the replacement package matches the existing PCB footprint requirements.
