LM431SACM32X FAIRCHILD [Fairchild Semiconductor], LM431SACM32X Datasheet

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LM431SACM32X

Manufacturer Part Number
LM431SACM32X
Description
Programmable Shunt Regulator
Manufacturer
FAIRCHILD [Fairchild Semiconductor]
Datasheet
LM431SA/LM431SB/LM431SC Rev. 1.2.0
© 2012 Fairchild Semiconductor Corporation
LM431SA/LM431SB/LM431SC
Programmable Shunt Regulator
Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.2Ω Typical
• Sink Current Capability of 1.0 to 100mA
• Equivalent Full-Range Temperature Coefficient of
• Temperature Compensated for Operation Over Full
• Low Output Noise Voltage
• Fast Turn-on Response
Internal Block Diagram
50ppm/°C Typical
Rated Operating Temperature Range
1
+
-
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
and 36 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
M32 - 1. Ref 2. Cathode 3. Anode
M3 - 1. Cathode 2. Ref 3. Anode
SOT-89
SOT-23
1
1
3
2
REF
1. Cathode 2. Ref 3. Anode
(approximately 2.5 volts)
SOT-23F
1
3
2
www.fairchildsemi.com
June 2012

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LM431SACM32X Summary of contents

Page 1

LM431SA/LM431SB/LM431SC Programmable Shunt Regulator Features • Programmable Output Voltage to 36 Volts • Low Dynamic Output Impedance 0.2Ω Typical • Sink Current Capability of 1.0 to 100mA • Equivalent Full-Range Temperature Coefficient of 50ppm/°C Typical • Temperature Compensated for Operation ...

Page 2

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) ML Suffix Package (SOT-89) MF Suffix Package (SOT-23F) M32, M3 Suffix Package (SOT-23) Power Dissipation ...

Page 3

Electrical Characteristics (T = +25°C, unless otherwise specified) A Parameter Symbol Reference REF KA Input Voltage Deviation of Reference Input Voltage Δ Δ =10mA REF KA Over- ≤ T MIN ...

Page 4

Test Circuits Figure 1. Test Circuit for V Figure 3. Test Circuit for l © 2012 Fairchild Semiconductor Corporation LM431SA/LM431SB/LM431SC Rev. 1.2.0 LM431S =V KA REF LM431S KA(OFF) 4 LM431S ≥V Figure 2. Test Circuit for V KA REF www.fairchildsemi.com ...

Page 5

Typical Performance Characteristics 150 REF 100 50 0 -50 -100 - Cathode Voltage (V) KA Figure 4. Cathode Current vs. Cathode Voltage 0.20 0.18 0.16 0.14 ...

Page 6

Typical Performance Characteristics 140 120 A 100 80 stable 100p 1n 10n C , LOAD CAPACITANCE L Figure 10. Stability Boundary Conditions 0.0 0.2 0.4 0.6 0.8 1.0 Ref.-Cathode ...

Page 7

Typical Application R ⎛ ------ - = + ⎝ LM431S Figure 13. Shunt Regulator R ⎛ ------ - = + ⎝ Figure 15. High Current Shunt Regulator LM431S ...

Page 8

Mechanical Dimensions Package Marking 43A 2% tolerance © 2012 Fairchild Semiconductor Corporation LM431SA/LM431SB/LM431SC Rev. 1.2.0 Dimensions in millimeters SOT-89 43B 1% tolerance 8 43C 0.5% tolerance www.fairchildsemi.com ...

Page 9

Mechanical Dimensions Package Marking 43A 2% tolerance © 2012 Fairchild Semiconductor Corporation LM431SA/LM431SB/LM431SC Rev. 1.2.0 (Continued) Dimensions in millimeters SOT-23F 43B 1% tolerance 9 43C 0.5% tolerance www.fairchildsemi.com ...

Page 10

Mechanical Dimensions Package Marking 43G M32 - 2% tolerance 43L tolerance © 2012 Fairchild Semiconductor Corporation LM431SA/LM431SB/LM431SC Rev. 1.2.0 (Continued) Dimensions in millimeters SOT-23 43H 1% tolerance 43M 1% tolerance 0.5% tolerance 10 43J 0.5% tolerance 43N ...

Page 11

... Product Number Output Voltage Tolerance Operating Temperature Package Packing Method LM431SCCMLX LM431SCCMFX LM431SCCM32X LM431SCCM3X LM431SBCMLX LM431SBCMFX LM431SBCM32X LM431SBCM3X LM431SACMLX LM431SACMFX LM431SACM32X LM431SACM3X Note : X suffix means " Tape and Reel " packing. © 2012 Fairchild Semiconductor Corporation LM431SA/LM431SB/LM431SC Rev. 1.2.0 0.5% 1% -25 ~ +85° SOT-89 ...

Page 12

TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended exhaustive list of all such trademarks. 2Cool F-PFS AccuPower FRFET Global Power Resource AX-CAP ...

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