Product details


VO (V) 1.25 Initial accuracy (Max) (%) 0.2, 0.5 Temp coeff (Max) (ppm/ degree C) 50 Rating Catalog Vin (Min) (V) 1.8 Vin (Max) (V) 12 Iq (Typ) (uA) 160 Features Enable pin Iout/Iz (Max) (mA) 5 Operating temperature range (C) -40 to 85 Shutdown current (Typ) (uA) 2 open-in-new Find other Series voltage references

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Series voltage references


  • Small SOT23-5 Package
  • Low Voltage Operation
  • High Output Voltage Accuracy: 0.2%
  • Source and Sink Current Output: ±5 mA
  • Supply current: 160 μA Typ.
  • Low Temperature Coefficient: 50 ppm/°C
  • Enable Pin
  • Output Voltages: 1.25V and Adjustable
  • Industrial Temperature Range: −40°C to +85°C
  • (For Extended Temperature Range, −40°C to 125°C, Contact Texas Instruments)

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The LM4121 is a precision bandgap voltage reference available in a fixed 1.25V and adjustable version with up to 5 mA current source and sink capability.

This series reference operates with input voltages as low as 1.8V and up to 12V consuming 160 µA (Typ.) supply current. In power down mode, device current drops to less than 2 μA.

The LM4121 comes in two grades A and Standard. The best grade devices (A) have an initial accuracy of 0.2%, while the standard have an initial accuracy of 0.5%, both with a tempco of 50ppm/°C ensured from −40°C to +125°C.

The very low operating voltage, low supply current and power-down capability of the LM4121 makes this product an ideal choice for battery powered and portable applications.

The device performance is ensured over the industrial temperature range (−40°C to +85°C), while certain specs are ensured over the extended temperature range (−40°C to +125°C). Please contact Texas Instruments for full specifications over the extended temperature range. The LM4121 is available in a standard 5-pin SOT-23 package.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet LM4121 Precision Micropower Low Dropout Voltage Reference datasheet (Rev. C) Mar. 29, 2013
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
White paper Voltage reference selection basics white paper (Rev. A) Oct. 23, 2018

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SOT-23 (DBV) 5 View options

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