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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 800MA SOT-223
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：20V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：70dB (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-18NOPB is a fixed-output low dropout linear voltage regulator manufactured by onsemi. It provides a stable 1.8V output with a maximum load current of 800mA. The device features a typical dropout voltage of 1.2V at full load and supports input voltages up to 15V or 20V depending on the specific datasheet reference. It operates within a temperature range of 0°C to 125°C and utilizes a SOT-223 surface-mount package.
Feature Summary
- Provides fixed 1.8V output with high accuracy
- Includes internal current limiting and thermal shutdown protection
- Compatible with standard LM317 pinout configurations
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulation for switching power supplies
- Embedded logic supply rails
Procurement Notes
Verify the manufacturer designation, as this part number appears in catalogs from both Texas Instruments and onsemi. Confirm the specific datasheet version matches your design requirements regarding input voltage limits and thermal performance. Ensure the SOT-223 package dimensions align with your PCB footprint specifications before finalizing procurement.
Selection Notes
Select this component when a fixed 1.8V rail is required with moderate current demands up to 800mA. It serves as a direct pin-compatible replacement for the adjustable LM317 in fixed-voltage applications. Consider its thermal dissipation capabilities relative to the expected voltage drop and ambient operating conditions.
Part Context
This device belongs to the LM1117 family of low dropout regulators known for their robustness and ease of use. The MPX suffix indicates a tape-and-reel packaging format suitable for automated assembly processes. The NOPB suffix denotes a lead-free and halogen-free compliant product variant.
Replacement Considerations
LM1117MPX-1.8/NOPB (Texas Instruments equivalent)
FAQ
What is the minimum output capacitance required for stability?
A minimum of 10µF tantalum capacitor is required at the output to ensure stability and improve transient response.
Does this regulator support adjustable output voltages?
No, the LM1117MPX-18NOPB is a fixed-output regulator providing only 1.8V. Adjustable versions require external resistors.
