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LM1117MPX-5.0/NOPB

800mA LDO regulator, 5.0V fixed output, 1.2V dropout, +/-1% accuracy, SOT-223 package

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Manufacturer Part：

LM1117MPX-5.0/NOPB

Package：

SOT-223-4 (6.5 x 3.5 x 1.8 mm)

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Description

Product Overview

The LM1117MPX-5.0/NOPB from Texas Instruments is an 800mA low-dropout (LDO) linear voltage regulator with a fixed 5.0V output. It features a dropout voltage of 1.2V at full load, current limiting and thermal shutdown protection, and +/-1% output voltage accuracy, housed in a compact SOT-223 package.

Key Specifications

Manufacturer Texas Instruments
Output Voltage 5.0V (fixed)
Output Current 800mA
Dropout Voltage 1.2V @ 800mA
Input Voltage Range 6.5V ~ 15V
Line Regulation 0.2% (max)
Load Regulation 0.4% (max)
Accuracy +/-1%
Package SOT-223-4
Operating Temperature 0°C ~ 125°C

Features

  • 800mA output current capability
  • Low dropout voltage: 1.2V at 800mA
  • Fixed 5.0V output with +/-1% accuracy
  • Zener-trimmed bandgap reference
  • Internal current limiting and thermal shutdown
  • Minimum 10uF output capacitor required (tantalum)
  • Available in SOT-223 and WSON packages
  • Line regulation: 0.2% max, Load regulation: 0.4% max

Applications

  • 5V power supply regulation from 6.5V-15V sources
  • Post-regulation for switching power supplies
  • Battery-powered instruments
  • Embedded system power rails
  • PC add-in cards

The Texas Instruments LM1117MPX-5.0/NOPB is a low-dropout linear voltage regulator capable of supplying 800mA of output current at a fixed 5.0V. The device features a dropout voltage of only 1.2V at full load current, making it suitable for applications where the input-to-output differential is small. A Zener-trimmed bandgap reference ensures output voltage accuracy of +/-1% over line, load, and temperature. The regulator includes internal current limiting and thermal shutdown protection, safeguarding the device against overload and fault conditions. The SOT-223 surface-mount package provides an efficient thermal path, and a minimum 10uF tantalum output capacitor is required for stability and transient response improvement.

The LM1117 operates as a series-pass linear regulator with three key functional blocks: 1) Bandgap Reference: A Zener-trimmed bandgap voltage reference generates a precise internal reference voltage that is compared against a fraction of the output voltage. This trimming ensures +/-1% initial accuracy. 2) Error Amplifier: The error amplifier continuously compares the feedback voltage with the reference and drives the pass transistor to maintain regulation. The loop compensation is designed for stability with a minimum 10uF output capacitor. 3) Protection Circuits: Current limiting protects the pass element from excessive current, while the thermal shutdown circuit disables the output when the junction temperature exceeds approximately 160°C, preventing device damage from overheating.

Pin Name Type Function
1 GND/ADJ Ground Ground terminal (fixed version); Adjust for adjustable version
2 VOUT Output Regulated 5.0V output; internally connected to tab
3 VIN Input Unregulated input voltage (6.5V to 15V)
4 TAB Output Tab connected to VOUT for heat dissipation
  • 5V power regulation from 6.5V-15V input rails in embedded systems
  • Post-regulation after switching converters for noise-sensitive analog circuits
  • Battery-powered instruments requiring stable 5V supply
  • PC add-in cards and peripheral power management
  • Industrial control systems with 12V or 9V input sources
Manufacturer Part Number Package Notes
TI LM1117IMPX-5.0/NOPB SOT-223 Industrial temp -40C to 125C
TI TLV1117LV50DCYR SOT-223 Lower dropout, newer alternative
TI TLV76150DCYR SOT-223 Improved LDO, direct drop-in
onsemi NCP1117ST50T3G SOT-223 1A output, 5V fixed
Microchip MCP1825-5002E/DB SOT-223 500mA, low Iq
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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