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Product details

Parameters

VO (V) 3.3, 5 Reference voltage Fixed Initial accuracy (Max) (%) 0.5, 1 Rating Catalog VO adj (Min) (V) 3.3 VO adj (Max) (V) 5 Iz for regulation (Min) (uA) 85 Temp coeff (Max) (ppm/ degree C) 61 Operating temperature range (C) -40 to 85 Iout/Iz (Max) (mA) 15 open-in-new Find other Shunt voltage references

Package | Pins | Size

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

Features

  • Fixed Voltages of 3.3 V and 5 V With Initial
    Tolerance of ±1% for Standard Grade and ±0.5%
    for A Grade
  • Custom Voltages Available (3 V to 17 V)
  • Wide Output Current Range (20 µA to 15 mA)
  • Low Temperature Coefficient
  • Available in 5-Pin SOT-23 Surface-Mount
    Package (Tape and Reel)
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Description

The LM3411 is a low-power fixed-voltage (3.3 V or 5 V) precision shunt regulator designed specifically for driving an optoisolator to provide feedback isolation in a switching regulator.

The LM3411 circuitry includes an internally compensated operational amplifier, a bandgap reference, NPN output transistor, and voltage setting resistors.

A trimmed precision bandgap reference with temperature drift curvature correction provides a ensured 1% precision over the operating temperature range (A grade version). The inverting input of the amplifier is externally accessible for loop frequency compensation when used as part of a larger servo system. The output is an open-emitter NPN transistor capable of driving up to 15 mA of load current.

Because of its small die size, the LM3411 has been made available in the subminiature 5-pin SOT-23 surface-mount package. This package is ideal for use in space-critical applications.

Although its main application is to provide a precision output voltage (no trimming required) and maintain very good regulation in isolated DC-DC converters, it can also be used with other types of voltage regulators or power semiconductors to provide a precision output voltage without precision resistors or trimming.

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Technical documentation

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Type Title Date
* Data sheet LM3411 Precision Secondary Regulator and Driver datasheet (Rev. F) May 27, 2016
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
User guide AN-1305 LM5030 Evaluation Board (Rev. A) May 06, 2013
Application note AN-1095 Design of Isolated Converters Using Simple Switchers (Rev. B) Apr. 23, 2013
White paper Versatility of the LM5030 PWM Push-Pull Controller Dec. 01, 2003

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CAD/CAE symbols

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SOT-23 (DBV) 5 View options

Ordering & quality

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