Product details


VO (V) 1.225 Reference voltage Adjustable, Fixed Initial accuracy (Max) (%) 0.1, 0.2, 0.5 Rating Catalog VO adj (Min) (V) 1.24 VO adj (Max) (V) 10 Iz for regulation (Min) (uA) 60 Temp coeff (Max) (ppm/ degree C) 50 Operating temperature range (C) -40 to 85 Iout/Iz (Max) (mA) 12 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 open-in-new Find other Shunt voltage references


  • No Output Capacitor Required
  • Tolerates Capacitive Loads
  • Reverse Breakdown Voltage Options of 1.225 V and Adjustable
  • Key Specifications:
    • Output Voltage Tolerance (A Grade, 25 ̊C) ± 0.1% (Maximum)
    • Output Noise (10 Hz to 10 kHz) 20 µV rms
    • Operating Current Range: 60 µA to 12 mA
    • Industrial Temp. Range: −40 ̊C to +85 ̊C
    • Extended Temp. Range: −40 ̊C to +125 ̊C
    • Temperature Coefficient: 50 ppm/ ̊C (Maximum)

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Ideal for space critical applications, the LM4051-N precision voltage reference is available in the sub-miniature (3 mm x 1.3 mm) SOT-23 surface-mount package. The LM4051-N’s advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus making the LM4051-N easy to use. Further reducing design effort is the availability of a fixed (1.225V) and adjust- able reverse breakdown voltage. The minimum operating current is 60 µA for the LM4051-1.2 and the LM4051-ADJ. Both versions have a maximum operating current of 12 mA.

The LM4051-N comes in three grades (A, B, and C). The best grade devices (A) have an initial accuracy of 0.1%, while the B-grade have 0.2% and the C-grade 0.5%, all with a tempco of 50 ppm/ ̊C guaranteed from −40 ̊C to 125 ̊C.

The LM4051-N utilizes fuse and zener-zap trim of reference voltage during wafer sort to ensure that the prime parts have an accuracy of better than ± 0.1% (A grade) at 25 ̊C.

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Technical documentation

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Type Title Date
* Datasheet LM4051-N Precision Micropower Shunt Voltage Reference datasheet (Rev. D) Sep. 28, 2018
Application notes Precision Current Sources and Sinks Using Voltage References Jun. 30, 2020
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019

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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Shunt voltage reference external resistor quick-start calculator
SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)
  • Case-specific tool to calculate external resistor value associated with shunt voltage reference
  • Input fields for: voltage reference, supply voltage, load current and Iq bound values
  • Real-time effects of input values on schematic
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