LM431 Adjustable Precision Zener Shunt Regulator LM431 3-terminal

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LM431 Adjustable Precision Zener Shunt Regulator LM431 3-terminal

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LM431 Adjustable Precision Zener Shunt Regulator
LM431 Adjustable Precision Zener Shunt Regulator
LM431 3-terminal adjustable shunt regulator with guaranteed temperature stability over entire temperature range operation. available chip sized package (4-Bump micro SMD) using National's micro package technology. output voltage level greater than 2.5V (VREF) merely selecting external resistors that voltage divided network. sharp turn-on characteristics this device excellent replacement many zener diode applications.
Features
Average temperature coefficient ppm/°C Temperature compensated operation over full temperature range Programmable output voltage Fast turn-on response output noise LM431 micro package
Connection Diagrams
TO-92: Plastic Package SOT-23: 3-Lead Small Outline
DS010055-28 DS010055-1
View 4-Bump micro
View SO-8: 8-Pin Surface Mount
DS010055-54 DS010055-2
view
View (bump side down)
1999 National Semiconductor Corporation
DS010055
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LM431
Ordering Information
Package TO-92 Typical Accuracy Order Number/Package Marking 0.5% LM431CCZ/ LM431CCZ LM431CIZ/ LM431CIZ SO-8 LM431CCM/ 431CCM LM431CIM/ 431CIM SOT-23 LM431CCM3/ LM431CIM3 micro LM431BCZ/ LM431BCZ LM431BIZ/ LM431BIZ LM431BCM/ 431BCM LM431BIM/ 431BIM LM431BCM3/ LM431BIM3 LM431ACZ/ LM431ACZ LM431AIZ/ LM431AIZ LM431ACM/ LM431ACM LM431AIM/ LM431AIM LM431ACM3/ LM431AIM3 LM431AIBP LM431AIBPX(Note Temperature Range +70°C Rails -40°C +85°C +70°C Rails Tape &Reel -40°C +85°C +70°C Rails Tape &Reel -40°C +85°C -40°C +85°C Units Tape Reel BPA04AFA Units Tape Reel MA03B M08A Z03A Transport Media Drawing
Note micro package marking digit manufacturing Date Code only
micro View Marking Example
DS010055-56
LM431 micro Package will marked with digit date manufacturing code. underline indicates bottom marking. will placed bottom left hand corner, rest numbers will follow counter-clockwise.
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LM431
Symbol Functional Diagrams
DS010055-99
DS010055-55
Test Circuits
DS010055-4
DS010055-5
FIGURE Test Circuit VREF
Note:
VREF R1/R2) IREF
FIGURE Test Circuit VREF
DS010055-6
FIGURE Test Circuit Off-State Current
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LM431
Absolute Maximum Ratings (Note
Military/Aerospace specified devices required, please contact National Semiconductor Sales Office/ Distributors availability specifications. Storage Temperature Range Operating Temperature Range Industrial (LM431xI) Commercial (LM431xC) Soldering Information Infrared Convection sec.) Wave Soldering sec.) Cathode Voltage Continuous Cathode Current -65°C +150°C -40°C +85°C +70°C 235°C 260°C (lead temp.) +150
Reference Voltage Reference Input Current Internal Power Dissipation (Notes TO-92 Package SO-8 Package SOT-23 Package micro Package
-0.5V 0.78W 0.81W 0.28W 0.30W
Operating Conditions
Cathode Voltage Cathode Current VREF
LM431 Electrical Characteristics
25°C unless otherwise specified Symbol VREF Parameter Reference Voltage Conditions VREF, LM431A (Figure VREF, LM431B (Figure VREF, VDEV Deviation Reference Input Voltage Over Temperature (Note Ratio Change Reference Voltage Change Cathode Voltage IREF IREF Reference Input Current Deviation Reference Input Current over Temperature IZ(MIN) IZ(OFF) Minimum Cathode Current Regulation Off-State Current Dynamic Output Impedance (Note LM431C (Figure VREF, Full Range (Figure from VREF 2.440 2.470 2.485 2.495 2.495 2.500 -1.4 -1.0 2.550 2.520 2.510 -2.7 -2.0 Units mV/V
(Figure
from
(Figure Full Range (Figure VREF (Figure 36V, VREF (Figure VREF, LM431A, Frequency (Figure VREF, LM431B, LM431C Frequency (Figure
0.75 0.50
Note Absolute Maximum Ratings indicate limits beyond which damage device occur. Electrical specifications apply when operating device beyond rated operating conditions. Note 150°C. Note Ratings apply ambient temperature 25°C. Above this temperature, derate TO-92 mW/°C, SO-8 mW/°C, SOT-23 mW/°C micro 3mW/°C. Note Deviation reference input voltage, VDEV, defined maximum variation reference input voltage over full temperature range.
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LM431
LM431 Electrical Characteristics
(Continued)
DS010055-7
average temperature coefficient reference input voltage, VREF, defined
Where: full temperature change (0-70°C). VREF positive negative depending whether slope positive negative. Example: VDEV VREF 2495 70°C, slope positive.
Note dynamic output impedance, defined
When device programmed with external resistors, (see Figure dynamic output impedance overall circuit, defined
Equivalent Circuit
DS010055-3
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LM431
Typical Performance Characteristics
Input Current Thermal Information Input Current
DS010055-29 DS010055-30
DS010055-31
Dynamic Impedance Frequency
DS010055-10
DS010055-9
Stability Boundary Conditions
DS010055-11
Note: areas under curves represent conditions that cause device oscillate. curves were adjusted establish initial conditions with were then adjusted determine ranges stability.
Test Circuit Curve Above
Test Circuit Curves Above
DS010055-12
DS010055-13
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LM431
Typical Applications
Shunt Regulator Single Supply Comparator with Temperature Compensated Threshold
DS010055-14
DS010055-15
Series Regulator
Output Control Three Terminal Fixed Regulator
DS010055-16 DS010055-17
Higher Current Shunt Regulator
Crow
DS010055-18
DS010055-19
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LM431
Typical Applications
(Continued) Over Voltage/Under Voltage Protection Circuit
DS010055-20
Voltage Monitor
DS010055-21
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LM431
Typical Applications
(Continued) Current Limiter Current Source
Delay Timer
DS010055-23
DS010055-22
Constant Current Sink
DS010055-24
Application Info
Mounting ensure that geometry micro package maintains good physical contact with printed circuit board, (NC) must soldered pcb. Please AN-1112 more detailed information regarding board mounting techniques micro package.
LM431 micro Light Sensitivity When LM431 micro package exposed bright sunlight, normal office fluorescent light, other LED's lasers, operates within guaranteed limits specified electrical characteristics table.
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LM431
Physical Dimensions
inches (millimeters) unless otherwise noted
Package Number M08A
SOT-23 Molded Small Outline Transistor Package (M3) Package Number MA03B
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LM431
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
Package Number Z03A
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LM431
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
NOTES: UNLESS OTHERWISE SPECIFIED EPOXY COATING 63Sn/37Pb EUTECTIC BUMP RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD. ESTABLISHED LOWER LEFT CORNER WITH RESPECT TEXT ORIENTATION. REMAINING PINS NUMBERED. DRAWING NUMBER REPRESENTS PACKAGE SIZE VARIATION WHERE PACKAGE WIDTH, PACKAGE LENGTH PACKAGE HEIGHT. REFERENCE JEDEC REGISTRATION MO-211, VARIATION 4-Bump micro 0.780 0.900 0.700 Package Number BPA04AFA
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LM431 Adjustable Precision Zener Shunt Regulator
Notes
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT GENERAL COUNSEL NATIONAL SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user.
National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: 80-530 Email: europe.support@nsc.com Deutsch Tel: 80-530 English Tel: 80-532 Tel: 80-532 Italiano Tel: 80-534
critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com
National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507
National does assume responsibility circuitry described, circuit patent licenses implied National reserves right time without notice change said circuitry specifications.

LM431 Adjustable Precision Zener Shunt Regulator LM431 3-terminal

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