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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 800MA SOT223
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：13.8V
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：10 mA
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223-4
- Grade：-
- Qualification：-
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Overview
The LM1117IMP-ADJ is an adjustable low-dropout linear regulator manufactured by Texas Instruments. It provides a maximum output current of 800 mA with a dropout voltage of 1.2 V at full load. The output voltage is programmable from 1.25 V to 13.8 V using two external resistors. The device features line regulation of 0.2% and load regulation of 0.4%. It operates within a junction temperature range of 0°C to 125°C and includes internal current limiting and thermal shutdown protection.
Feature Summary
- Adjustable output voltage configuration via external resistors
- Integrated current limiting and thermal shutdown protection
- Low dropout voltage performance for efficient power management
Applications
- Post regulator for switching DC-DC converters
- Battery chargers
- Portable instrumentation
- Active SCSI termination regulator
Procurement Notes
Verify the specific suffix 'IMP' against the manufacturer's datasheet to confirm the package type (SOT-223) and operating temperature grade (LM1117 vs LM1117I). Ensure the ordering code matches the exact revision level required for your design, as TI may update documentation or component specifications over time.
Selection Notes
Select this component when an adjustable positive voltage rail is required up to 800 mA. Ensure the input-to-output differential remains above the specified dropout voltage across all operating temperatures. Verify that the application circuit includes the recommended minimum output capacitance to maintain stability and transient response.
Part Context
This part belongs to the LM1117 family of low-dropout regulators. It shares pin compatibility with industry-standard three-terminal regulators like the LM317 but offers lower dropout voltage and higher current capability in a compact surface-mount package. The adjustable version allows flexibility in setting precise output voltages without fixed internal resistor networks.
Replacement Considerations
Direct functional substitutes include other adjustable LDOs from Texas Instruments such as the LM1117IMX-ADJ/NOPB. Cross-reference with National Semiconductor equivalents if applicable. Verify pinout compatibility and thermal characteristics before substituting.
