Product details


VO (V) 1.8, 2.048, 2.5, 3, 3.3, 4.096, 5 Initial accuracy (Max) (%) 0.2, 0.5 Temp coeff (Max) (ppm/ degree C) 50 Rating Catalog Vin (Min) (V) 2 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 Dropout Voltage: 120 mV Typical at 1 mA
  • High Output Voltage Accuracy: 0.2%
  • Source and Sink Current Output: ±5 mA
  • Supply Current: 160 µA Typical
  • Low Temperature Coefficient: 50 ppm/°C
  • Enable Pin
  • Fixed Output Voltages: 1.8, 2.048, 2.5, 3, 3.3,
    4.096, and 5 V
  • Industrial Temperature Range: −40°C to 85°C
  • (For Extended Temperature Range, −40°C to
    125°C, Contact TI)
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The LM4120 device is a precision low-power, low dropout bandgap voltage reference with up to 5-mA output current source and sink capability.

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

The LM4120 comes in two grades (A and Standard) and seven voltage options for greater flexibility. 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 temperature coefficient of 50 ppm/°C ensured from −40°C to 125°C.

The very low dropout voltage, low supply current, and power-down capability of the LM4120 make 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 specifications are ensured over the extended temperature range (−40°C to 125°C). Contact TI for full specifications over the extended temperature range. The LM4120 is available in a standard 5-pin SOT-23 package.

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Same functionality and pinout but is not an equivalent to the compared device:
LM4121 ACTIVE Fixed-voltage, 0.2% 50-ppm/°C drift precision series voltage reference with enable pin 1.25V fixed and adjustable down to 1.22V
Similar but not functionally equivalent to the compared device:
LM4128 ACTIVE 0.1% 75-ppm/°C SOT-23 precision micropower series voltage reference with enable pin Lower Iq
REF3125 ACTIVE 2.5-V, 20-ppm/°C max, 100-µA, 3-pin SOT-23 series voltage reference Better temperature coefficient

Technical documentation

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Type Title Date
* Datasheet LM4120 Precision Micropower Low Dropout Voltage Reference datasheet (Rev. F) Mar. 17, 2016
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
White papers Voltage reference selection basics white paper (Rev. A) Oct. 23, 2018
Technical articles Trends in building automation: connected sensors in safety and security Jul. 20, 2016
User guides Gas Sensor Platform Reference Design Aug. 09, 2013
Selection guides Voltage Reference Overview Jul. 26, 2013
User guides LMP2021MAEVAL - Bridge Sensor Instrumentation Amp Evaluation Board User Guide (Rev. A) Apr. 22, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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SOT-23 (DBV) 5 View options

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