LM431CCM3 National Semiconductor, LM431CCM3 Datasheet

IC, SHUNT REG, ADJ, ZENER, 3SOT23

LM431CCM3

Manufacturer Part Number
LM431CCM3
Description
IC, SHUNT REG, ADJ, ZENER, 3SOT23
Manufacturer
National Semiconductor
Datasheet

Specifications of LM431CCM3

Primary Input Voltage
37V
Output Voltage Adjustable Range
2.5V To 36V
No. Of Outputs
1
No. Of Pins
3
Voltage Regulator Case Style
SOT-23
Operating Temperature Range
0°C To +70°C
Svhc
No SVHC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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© 2005 National Semiconductor Corporation
LM431
Adjustable Precision Zener Shunt Regulator
General Description
The LM431 is a 3-terminal adjustable shunt regulator with
guaranteed temperature stability over the entire temperature
range of operation. It is now available in a chip sized pack-
age (4-Bump micro SMD) using National’s micro SMD pack-
age technology. The output voltage may be set at any level
greater than 2.5V (V
external resistors that act as a voltage divided network. Due
to the sharp turn-on characteristics this device is an excel-
lent replacement for many zener diode applications.
Connection Diagrams
Note: *NC = Not internally connected. Must be electrically isolated from the rest of the circuit for the microSMD package.
SO-8: 8-Pin Surface Mount
TO-92: Plastic Package
REF
) up to 36V merely by selecting two
Top View
Top view
DS010055
01005501
01005502
Features
n Average temperature coefficient 50 ppm/˚C
n Temperature compensated for operation over the full
n Programmable output voltage
n Fast turn-on response
n Low output noise
n LM431 in micro SMD package
n See AN-1112 for micro SMD considerations
temperature range
SOT-23: 3-Lead Small Outline
4-Bump micro SMD
(bump side down)
Top View
Top View
01005528
01005554
www.national.com
March 2005

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LM431CCM3 Summary of contents

Page 1

... Top View SO-8: 8-Pin Surface Mount Top view Note: *NC = Not internally connected. Must be electrically isolated from the rest of the circuit for the microSMD package. © 2005 National Semiconductor Corporation Features n Average temperature coefficient 50 ppm/˚C n Temperature compensated for operation over the full ...

Page 2

... LM431CIM/ LM431BIM/ 431CIM 431BIM LM431CIMX/ LM431BIMX/ 431CIM 431BIM SOT-23 LM431CCM3/ LM431BCM3/ N1B N1D LM431CCM3X/ LM431BCM3X/ N1B N1D LM431CIM3 LM431BIM3 N1A N1C LM431CIM3X LM431BIM3X N1A N1C micro SMD – Note 1: The micro SMD package marking digit manufacturing Date Code only www ...

Page 3

Symbol and Functional Diagrams 01005599 DC Test Circuits 01005505 Note R1/R2 • REF REF 01005504 FIGURE 1. Test Circuit for > FIGURE 2. Test Circuit for V ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Temperature Range Industrial (LM431xI) Commercial (LM431xC) Soldering Information Infrared or Convection (20 sec.) Wave Soldering (10 sec.) Cathode Voltage Continuous Cathode Current ...

Page 5

LM431 Electrical Characteristics The average temperature coefficient of the reference input voltage, ∝ V Where: T − full temperature change (0-70˚C ∝ V can be positive or negative depending on whether the slope is positive or ...

Page 6

Equivalent Circuit Typical Performance Characteristics Input Current vs V Input Current vs V www.national.com Z 01005529 Dynamic Impedance vs Frequency Z 01005531 6 01005503 Thermal Information 01005530 01005509 ...

Page 7

Typical Performance Characteristics Stability Boundary Conditions Note: The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V establish the initial V and I conditions with C = ...

Page 8

Typical Applications Series Regulator Output Control of a Three Terminal Fixed Regulator www.national.com (Continued) 01005516 01005517 8 Higher Current Shunt Regulator 01005518 Crow Bar 01005519 ...

Page 9

Typical Applications (Continued) Over Voltage/Under Voltage Protection Circuit Voltage Monitor 01005521 9 01005520 www.national.com ...

Page 10

Typical Applications Delay Timer Application Info 1.0 Mounting To ensure that the geometry of the micro SMD package maintains good physical contact with the printed circuit board, pin A1 (NC) must be soldered to the pcb. Please see AN-1112 for ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted SOT-23 Molded Small Outline Transistor Package (M3) 8-Pin SOIC NS Package Number M08A NS Package Number MF03A 11 www.national.com ...

Page 12

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) NS Package Number Z03A 12 ...

Page 13

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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