LM4051-N Fixed & adjustable, precision micropower shunt voltage reference | TI.com

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Fixed & adjustable, precision micropower shunt voltage reference


Recommended alternative parts

  • LM4121  -  Series (LDO) Type Voltage Reference
  • LM4050-N  - The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device.   Higher (2 V to 10 V), fixed output voltage


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.


  • 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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WEBENCH® Designer LM4051-N

  Min   Max Range
Vin  V 1.24 to 15.0V
Vout  V 1.24 to 10V
Iout  A ≤ 0.012A
Ambient Temp  °C -40 to 85°C


Compare all products in Shunt voltage references Email Download to Excel
Part number Order Reference voltage VO (V) VO adj (Min) (V) VO adj (Max) (V) Initial accuracy (Max) (%) Temp coeff (Max) (ppm/ degree C) Rating Operating temperature range (C) Iz for regulation (Min) (uA) Iout/Iz (Max) (mA) Package Group Iref (uA) I I(dev) (uA)
LM4051-N Order now Adjustable
1.225     1.24     10     0.1
50     Catalog     -40 to 85     60     12     SOT-23 | 3     0.07     0.08