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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 800MA SOT-223
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：20V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：13.8V
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：-
- Current - Supply (Max)：-
- PSRR：73dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
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Overview
The LM1117MPX-ADJNOPB is an adjustable low-dropout linear voltage regulator manufactured by onsemi. It provides a maximum output current of 800mA with an adjustable output voltage range from 1.25V to 13.8V. The device features a maximum input voltage rating of 15V and operates within a junction temperature range of -40°C to +125°C. It utilizes a SOT-223 surface-mount package. Key electrical characteristics include a typical dropout voltage of 1.2V at full load, line regulation of 0.04%, and load regulation of 0.2%. The internal circuitry incorporates a zener-clamped bandgap reference for accuracy.
Feature Summary
- Adjustable output voltage configuration using external resistors
- Integrated thermal shutdown and current limiting protection
- Low dropout voltage operation for efficient power management
- Zener-clamped bandgap reference ensures output voltage precision
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulators for switching power supplies
- Local voltage regulation in embedded control circuits
Procurement Notes
Verify the manufacturer designation carefully, as the LM1117 series is historically associated with Texas Instruments but is now produced by onsemi under this specific part number. Confirm the suffix NOPB indicates lead-free and RoHS compliance. Ensure the SOT-223 package variant matches your PCB footprint requirements. Cross-reference the datasheet revision date to confirm pinout consistency with legacy designs.
Selection Notes
Select this component when an adjustable LDO is required for currents up to 800mA. It serves as a direct pin-compatible replacement for the industry-standard LM317 in many applications. Consider the thermal performance in the SOT-223 package relative to the expected power dissipation. Verify that the input-to-output voltage differential remains within the specified dropout limits for stable regulation under all load conditions.
Part Context
This component belongs to the LM1117 family of low-dropout regulators. The MPX suffix denotes the SOT-223 surface-mount package. The ADJ designation confirms the adjustable output version, distinct from fixed-voltage variants like 3.3V or 5.0. The NOPB suffix signifies that the device is manufactured without halogenated flame retardants and complies with RoHS directives.
Replacement Considerations
Direct pin-compatible alternatives within the same family include other LM1117MPX variants with different fixed voltages. For adjustable versions, verify compatibility with LM1117IMPX-ADJ/NOPB, noting potential differences in manufacturer-specific electrical tolerances and thermal characteristics between TI and onsemi production runs.
