lm431sbcml Fairchild Semiconductor, lm431sbcml Datasheet

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lm431sbcml

Manufacturer Part Number
lm431sbcml
Description
Adjustable/2.5v, 0.5% Tolerance Shunt Regulator
Manufacturer
Fairchild Semiconductor
Datasheet
Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.20 Typical
• Sink Current Capability of 1.0 to 100mA
• Equivalent Full-Range Temperature Coefficient of
• Temperature Compensated for Operation Over Full Rated
• Low Output Noise Voltage
• Fast Turn-on Response
Internal Block Diagram
©2006 Fairchild Semiconductor Corporation
LM431SA/LM431SB/LM431SC
Programmable Shunt Regulator
50ppm/°C Typical
Operating Temperature Range
+
-
Description
The LM431SA/LM431SB/LM431SC are three terminal
output adjustable regulators with thermal stability over
operating temperature range. The output voltage can be set
any value between V
volts with two external resistors. These devices have a
typical dynamic output impedance of 0.2Ω Active output
circuit provides a sharp turn-on characteristic, making these
devices excellent replacement for Zener Diodes in many
applications.
1. Ref 2. Anode 3. Cathode
1. Cathode 2. Ref 3. Anode
SOT-89
SOT-23F
1
1
3
2
REF
(approximately 2.5 volts) and 36
July 2006
Rev. 1.0.5
tm

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lm431sbcml Summary of contents

Page 1

... Temperature Compensated for Operation Over Full Rated Operating Temperature Range • Low Output Noise Voltage • Fast Turn-on Response Internal Block Diagram ©2006 Fairchild Semiconductor Corporation Description The LM431SA/LM431SB/LM431SC are three terminal output adjustable regulators with thermal stability over operating temperature range. The output voltage can be set any value between V (approximately 2 ...

Page 2

LM431SA/LM431SB/LM431SC Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified.) Parameter Cathode Voltage Cathode current Range (Continuous) Reference Input Current Range Thermal Resistance Junction-Air (Note1,2) MF Suffix Package ML Suffix Package Power Dissipation (Note3,4) MF Suffix Package ML Suffix ...

Page 3

Electrical Characteristics (T = +25°C, unless otherwise specified) A Parameter Symbol Conditions Reference REF KA REF Input Voltage Deviation of Reference ∆ Input Voltage REF KA REF ∆ ≤T Over MIN ...

Page 4

LM431SA/LM431SB/LM431SC Test Circuits LM431S Figure 1. Test Circuit for V LM431S Figure 3. Test Circuit for l 4 Figure 2. Test Circuit for REF KA(OFF) LM431S ≥V KA REF ...

Page 5

Typical Performance Characteristics 150 REF 100 50 0 -50 -100 - Cathode Voltage (V) KA Figure 4. Cathode Current vs. Cathode Voltage 0.100 0.075 0.050 ...

Page 6

LM431SA/LM431SB/LM431SC Typical Performance Characteristics 140 120 A 100 80 stable 100p 1n 10n 100n C , LOAD CAPACITANCE L Figure 10. Stability Boundary Conditions 0.0 0.2 0.4 0.6 0.8 ...

Page 7

Typical Application R ⎛ ⎞ ------ - = + ⎝ ⎠ O ref R 2 LM431S . Figure 13 Shunt Regulator LM431S Figure 16. Current Limit or Current Source R ⎛ ⎞ 1 ------ - V ...

Page 8

LM431SA/LM431SB/LM431SC Mechanical Dimensions Package Marking 43A 2% tolerance 8 Dimensions in millimeters SOT-23F 43B 1% tolerance 43C 0.5% tolerance ...

Page 9

Mechanical Dimensions Package ±0.20 4.50 ±0.10 1.65 0.50 ±0.10 1.50 TYP 1.50 TYP Marking 43A 2% tolerance (Continued) Dimensions in millimeters SOT-89 C0.2 0.40 ±0.10 0.40 43B 1% tolerance LM431SA/LM431SB/LM431SC 1.50 ±0.20 (0.40) +0.10 –0.05 43C 0.5% tolerance 9 ...

Page 10

... LM431SA/LM431SB/LM431SC Ordering Information Product Number Output Voltage Tolerance LM431SCCML LM431SCCMF LM431SBCML LM431SBCMF LM431SACML LM431SACMF 10 Package SOT-89 0.5% SOT-23F SOT-89 1% SOT-23F SOT-89 2% SOT-23F Operating Temperature -25 ~ +85°C ...

Page 11

... LM431SA/LM431SB/LM431SC TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ACEx™ FACT Quiet Series™ ActiveArray™ GlobalOptoisolator™ Bottomless™ GTO™ Build it Now™ ...

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