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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：-40°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 LM1117IMPX-ADJ/NOPB is an adjustable low-dropout linear regulator manufactured by Texas Instruments, not onsemi. It provides an output current of 800 mA with an adjustable voltage range from 1.25 V to 13.8 V. The device operates with a maximum input voltage of 15 V and features a typical dropout voltage of 1.2 V at full load. It includes internal thermal overload protection and current limiting. The component is housed in a SOT-223-4 surface-mount package and supports operation over a temperature range of -40°C to +125°C.
Feature Summary
- Integrated thermal shutdown and current limiting for robust protection under fault conditions
- Adjustable output voltage capability using external resistors within specified limits
- Low dropout voltage performance ensuring efficient regulation with minimal input-output differential
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulators for switching power supplies
- Local voltage regulation in embedded circuits
Procurement Notes
Verify the manufacturer designation carefully, as the model prefix 'LM' typically indicates Texas Instruments rather than onsemi. Confirm the exact part number suffix '/NOPB' for lead-free compliance. Ensure the supplier source matches the original equipment manufacturer to avoid counterfeit components. Cross-reference the datasheet specifications against your design requirements before procurement.
Selection Notes
Select this component when an adjustable positive LDO with 800 mA capacity is required. Consider the SOT-223-4 package for space-constrained surface-mount designs. Evaluate the thermal dissipation capabilities based on the expected voltage drop and load current. Verify that the input voltage remains within the 15 V maximum limit during all operating conditions.
Part Context
This device belongs to the LM1117 series of low-dropout regulators known for their pin compatibility with the LM317. It is designed for applications needing moderate current drive with high line and load regulation. The series offers both fixed and adjustable output versions across various packages including TO-220, DPAK, and SOT-223.
Replacement Considerations
Compatible substitutes include other LM1117 variants such as LM1117IDTX-ADJ/NOPB or LM1117LD-ADJ/NOPB, provided the package and electrical specifications match the design constraints.
