LM4040 Series 5 V ±0.5% Precision Micropower Shunt Voltage Reference-SOT-23-3

Mfr Part#: LM4040CYM3-5.0-TR
Mounting Method:  Surface Mount
Package Style:  SOT-23 (SC-59,TO-236)
Packaging:  REEL
Std Packaging Qty:  3,000



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$0.1960 USD (each)
3000 $0.1960
6000+ $0.1570 (Save 20%)


Qty in Stock : 6,000
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Min. Order Qty: 3,000
Multiple of: 3,000
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Product Highlight

  • Type: Shunt
  • Reference Voltage: 5 V
  • Tolerance (%) : ±0.5 %
  • Rated Current: 0.06 to 15 mA
  • Forward (Drive) Current: 10 mA
The LM4040 is the available in fixed reverse breakdown voltages of 2.500 V, 4.096 V and 5.000 V. The LM4040 and LM4041’s advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, making them easy to use.

The minimum operating current ranges from 60 µA for the LM4041-1.2 to 74 µA for the LM4040-5.0. LM4040 versions have a maximum operating current of 15 mA. LM4041 versions have a maximum operating current of 12 mA.

The LM4040 and LM4041 utilizes zener-zap reverse breakdown voltage trim during wafer sort. Bandgap reference temperature drift curvature correction and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents. The LM4040 and LM4041 precision voltage references are available in the subminiature (3 mm x 1.3 mm) SOT-23 surface-mount package.


  • Small SOT-23 package
  • No output capacitor required
  • Tolerates capacitive loads
  • Fixed reverse breakdown voltages of 1.225, 2.500 V, 4.096 V and 5.000 V
  • Adjustable reverse breakdown version
  • Contact Micrel for parts with extended temperature range.


  • Output voltage tolerance (C grade, 25°C) ±0.5% (max)
  • LM4040 35 µVRMS (typ)
  • LM4041 20 µVRMS (typ)
  • Wide operating current range
  • LM4040 60 µA to 15 mA
  • Industrial temperature range –40°C to +85°C
  • Low temperature coefficient 100 ppm/°C (max)


  • Battery-Powered Equipment
  • Data Acquisition Systems
  • Instrumentation
  • Process Control
  • Energy Management
  • Product Testing
  • Automotive Electronics
  • Precision Audio Components

Learn more about the LM4040 family of linear regulators

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