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LM2936MP-5.0

50mA LDO, 5.0V fixed, 40V in, 15uA Iq, 200mV dropout, SOT-223, automotive

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Manufacturer Part：

LM2936MP-5.0

Package：

SOT-223 (6.50 x 3.50 x 1.60 mm)

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Description

Product Overview

The LM2936MP-5.0 from Texas Instruments is a 50mA, 40V low-dropout voltage regulator with a fixed 5.0V output in a SOT-223 package. Featuring ultra-low quiescent current of 15uA, it is designed for automotive and battery-powered applications requiring always-on regulation.

Key Specifications

Output Voltage 5.0 V (fixed)
Input Voltage 5.3 V to 40 V
Output Current 50 mA
Dropout Voltage 200 mV (typical at 50mA)
Quiescent Current 15 uA (typical)
Operating Temperature -40C to +125C

Features

  • Ultra-low 15uA quiescent current for always-on battery systems
  • 40V maximum input for automotive load dump protection
  • Fixed 5.0V output with 2% accuracy

Applications

  • Automotive body electronics and ECU standby power
  • Battery-powered instruments with always-on regulation
  • Industrial sensor power supplies
  • Remote and wireless module power

The LM2936MP-5.0 from Texas Instruments is a 50mA low-dropout voltage regulator with a fixed 5.0V output in a SOT-223 package. The device operates from 5.3V to 40V input, providing automotive load dump protection. The ultra-low 15uA typical quiescent current makes it ideal for always-on battery-powered systems where standby current must be minimized. Dropout voltage is 200mV typical at 50mA load. The device features reverse battery protection, 60V load dump protection, and thermal shutdown. The -40C to +125C operating temperature range supports automotive and industrial environments. The SOT-223 package provides a small footprint with good thermal performance.

The LM2936MP-5.0 uses a PNP pass transistor in a low-dropout configuration. (1) Pass Element: A PNP transistor allows the input-to-output voltage differential to be as low as 200mV while maintaining regulation, compared to 2V for standard NPN regulators. (2) Low Iq: The bias circuitry is designed to minimize quiescent current to 15uA typical, which remains relatively constant over the full load range. This is critical for always-on automotive applications. (3) Protection: Reverse battery protection prevents damage when the input voltage is reversed. Internal thermal shutdown disables the output when junction temperature exceeds approximately 160C. (4) Load Dump: The device withstands 60V transient input voltage from automotive load dump events without damage.

Pin Name Type Function
1 VIN Input Input supply (5.3-40V)
2 GND Ground Ground / tab
3 VOUT Output Regulated 5.0V output
  • Automotive body electronics and ECU standby power with 15uA Iq
  • Battery-powered instruments with always-on regulation at 40V max input
  • Industrial sensor power supplies with 200mV low dropout
  • Remote and wireless module power in SOT-223 compact footprint
Manufacturer Part Number Package Notes
TI LM2936MP-3.3 SOT-223 3.3V version
onsemi NCP4623HSN50T1G SOT-89 5V, 150mA, similar
Microchip TC1071VPA SOT-223 50mA LDO, 5V
Infineon TLE4274DNT SOT-223 5V, 200mA, automotive
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