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Product details

Parameters

VO (V) 1.8, 2.048, 2.5, 3, 3.3, 4.096 Initial accuracy (Max) (%) 0.1, 0.2, 0.5, 1 Temp coeff (Max) (ppm/ degree C) 100, 75 Rating Automotive Vin (Min) (V) 2.2 Vin (Max) (V) 5.5 Iq (Typ) (uA) 60 TI functional safety category Functional Safety-Capable Features Enable pin Iout/Iz (Max) (mA) 20 Operating temperature range (C) -40 to 125 Shutdown current (Typ) (uA) 3 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

Features

  • Output Voltage Initial Accuracy 0.1%
  • Low Temperature Coefficient 75 ppm/°C
  • Low Supply Current, 60 µA
  • Enable Pin Allowing a 3 µA Shutdown Mode
  • Up to 20 mA Output Current
  • Voltage Options 1.8V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V
  • Custom Voltage Options Available (1.8V to 4.096V)
  • VIN Range of VREF + 400 mV to 5.5V @10 mA
  • Stable with Low ESR Ceramic Capacitors
  • 5-Pin SOT-23 Package
  • −40°C to 125°C Junction Temperature Range
  • LM4128AQ/BQ/CQ/DQ are AEC-Q100 Grade 1 Qualified and are Manufactured on an Automotive Grade Flow

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Description

Ideal for space critical applications, the LM4128 precision voltage reference is available in the SOT-23 surface-mount package. The LM4128’s advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with capacitive loads up to 10 µF, thus making the LM4128 easy to use.

Series references provide lower power consumption than shunt references, since they do not have to idle the maximum possible load current under no load conditions. This advantage, the low quiescent current (60 µA), and the low dropout voltage (400 mV) make the LM4128 ideal for battery-powered solutions.

The LM4128 is available in four grades (A, B, C, and D) for greater flexibility. The best grade devices (A) have an initial accuracy of 0.1% with ensured temperature coefficient of 75 ppm/°C or less, while the lowest grade parts (D) have an initial accuracy of 1.0% and a tempco of 100 ppm/°C.

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Exact equivalent in functionality and parametrics to the compared device:
LM4132-Q1 ACTIVE Automotive, SOT-23 precision low dropout voltage reference This is an upgraded version of LM4128-Q1 with lower drift over temperature, lower noise and higher accuracy.

Technical documentation

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Type Title Date
* Datasheet LM4128/LM4128Q SOT-23 Precision Micropower Series Voltage Reference datasheet (Rev. E) Mar. 29, 2013
Application notes LM4128, LM4128-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 18, 2019
More literature Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Technical articles Speeding through the ADAS market 0-60 Dec. 07, 2015
Application notes AN-1984 LM57 Temperature Switch vs Thermistors (Rev. C) May 01, 2013

Design & development

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

Reference designs

REFERENCE DESIGNS Download
Automotive Digitally Controlled Boost Power Supply
TIDA-00282 This TI reference design is an automotive voltage boost converter module. The purpose of this module is to supply a steady voltage to vehicle electronics by boosting during voltage droop events such as engine crank. The design is based on the C2000 Real-Time Microcontroller, and will provide up to (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

Ordering & quality

Support & training

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Videos

Voltage Reference Use Cases

Beyond the scope of signal chain conditioning, see other voltage reference use cases in this informative video.

Posted: 07-Jan-2018
Duration: 05:53

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