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LM2937IMP-5.0/NOPB

500mA LDO, 5V fixed output, 26V max input, SOT-223, automotive rated

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Manufacturer Part：

LM2937IMP-5.0/NOPB

Package：

SOT-223-4 (6.7 x 3.7 x 1.7 mm)

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Description

Product Overview

The LM2937IMP-5.0/NOPB from Texas Instruments is a 500mA low-dropout voltage regulator with a fixed 5.0V output in a SOT-223 surface-mount package. It features high PSRR, low quiescent current, and built-in protection circuits ideal for automotive and industrial applications.

Key Specifications

Output Voltage 5.0V (fixed)
Output Current 500mA
Input Voltage Range 6V ~ 26V
Dropout Voltage 0.5V typ @ 500mA
Quiescent Current 10mA typ
Line Regulation 50mV
Load Regulation 50mV
Operating Temperature -40°C ~ 85°C

Features

  • 500mA output with low dropout voltage
  • Wide input voltage range up to 26V
  • Reverse battery protection
    • Short-circuit and thermal shutdown protection
  • Transient load dump protection (+60V/-50V)
  • Output accuracy of +/-5%

Applications

  • Automotive electronics and ECU power supplies
  • Battery-powered instrumentation
  • Industrial control systems
  • Post-regulation after switching supplies
  • Portable equipment power management

The LM2937IMP-5.0/NOPB is a 500mA positive low-dropout voltage regulator from Texas Instruments, optimized for automotive and battery-powered applications. It provides a fixed 5.0V output from an input voltage range of 6V to 26V, with a typical dropout voltage of just 0.5V at full load. The device incorporates comprehensive protection including reverse battery protection, +60V/-50V transient load dump immunity, short-circuit current limiting, and thermal shutdown. These features make it exceptionally robust in harsh electrical environments.

The LM2937 uses a PNP pass transistor to achieve low dropout voltage. In regulation, the error amplifier compares a fraction of the output voltage (via an internal resistor divider) with a bandgap reference, adjusting the PNP transistor base drive to maintain 5.0V at the output. When input voltage drops below the minimum headroom, the PNP saturates and the output tracks the input minus the dropout voltage. Internal protection circuits monitor output current and die temperature, activating current limiting or thermal shutdown when thresholds are exceeded.

Pin Name Type Function
1 VIN Input Input voltage (6-26V)
2 GND Power Ground / Tab
3 VOUT Output Regulated 5V output
4 GND (Tab) Power Ground / Heatsink tab
  • Automotive ECU and sensor power supplies
  • Battery-powered instrumentation and meters
  • Post-regulation after switching converters
  • Industrial PLC and control module power
  • Portable device 5V rail generation
Manufacturer Part Number Package Notes
Texas Instruments LM2937IMPX-5.0/NOPB SOT-223 Tape and reel version
onsemi NCP566ST5T3G SOT-223 5V, 500mA LDO
Microchip TC1262-5.0VDBTR SOT-223 5V, 500mA, low Iq
Infineon TLE4274D TO-252 Automotive 5V LDO, 200mA
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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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