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Manufacturer Part #


LM2931 Series 100 mA 3.3 V Fixed Output SMT VLDO Voltage Regulator - SOIC-8

ECAD Model:
Mfr. Name: STMicroelectronics
Standard Pkg:
Product Variant Information section
Date Code: 1834
Product Specification Section
Technical Attributes
Attributes Table
Input Voltage-Max: 26V
Output Voltage Fixed: 3.3V
Dropout Voltage-Max: 0.6V
Output Current-Max: 100mA
Operating Temp Range: -40°C to +125°C
Regulator Topology: Fixed
Quiescent Current: 30mA
No. of Outputs: Single
Output Noise: 330µV
Load Regulation: 10mV
Current - Limit: 300mA
Line Regulation: 4mV
Package Style:  SOIC-8
Mounting Method: Surface Mount
Features & Applications
The LM2931AD33R are very low drop regulators. The very low drop voltage and the low quiescent current make them particular suitable for low noise, low power applications and in batterypowered systems.

In the 8-pin configuration (SO- 8), fully compatible with the older L78Lxx family, a shutdown logic control function is available. This means that when the device is used as a local regulator it is possible to put a part of the board in standby, decreasing total power consumption.


  • Very low dropout voltage (0.15 V typ. at 10 mA load)
  • Low quiescent current (typ. 2.5 mA, at 100 mA load)
  • Output current up to 100 mA
  • Adjustable (from VOUT = 2.5 V only SO-8) and fixed (3.3 V and 5 V) output voltage version
  • Internal current and thermal limit
  • Load dump protection up to 60 V
  • Reverse transient protection up to -50 V
  • Temperature range: -40 to 125 °C
  • Package available: TO-92, DPAK, SO-8 (with inhibit control)

View the Complete family of LM2931A Linear Regulators

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Product Variant Information section