Datasheet Texas Instruments LM431CCM3X/NOPB
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www.ti.com SNVS020G MAY 2000 REVISED APRIL 2013 LM431 Adjustable Precision Zener Shunt Regulator
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Average Temperature Coefficient 50 ppm/°C Temperature Compensated for Operation Over the Full Temperature Range Programmable Output Voltage Fast Turn-On Response Low Output Noise DESCRIPTION
The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5V (VREF) up to 36V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications. 2 Connection Diagram Figure 1. TO-92: Plastic Package Top View
A. Note: NC = Not internally connected. Figure 2. SOT-23: 3-Lead Small Outline Top View Figure 3. SOIC: 8-Pin Surface Mount Top view Symbol and Functional Diagrams 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners.
Copyright © 20002013, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. LM431
SNVS020G MAY 2000 REVISED APRIL 2013 www.ti.com DC Test Circuits Note: VZ = VREF (1 + R1/R2) + IREF R1 Figure 4. Test Circuit for VZ = VREF Figure 5. Test Circuit for VZ > VREF Figure 6. Test Circuit for Off-State Current
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in con...