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LM431B

Fairchild Semiconductor
Part Number LM431B
Manufacturer Fairchild Semiconductor
Description Programmable Shunt Regulator
Published Mar 22, 2005
Detailed Description www.fairchildsemi.com LM431A/LM431B/LM431C Programmable Shunt Regulator Features • • • • Programmable Output Voltage to...
Datasheet PDF File LM431B PDF File

LM431B
LM431B

Overview
www.
fairchildsemi.
com LM431A/LM431B/LM431C Programmable Shunt Regulator 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 50ppm/°C Typical • Temperature Compensated for Operation Over Full Rated Operating Temperature Range • Low Output Noise Voltage • Fast Turn-on Response Description The LM431A/LM431B/LM431C are three terminal output adjustable regulators with thermal stability over operating temperature range.
The output voltage can be set any value between VREF (approximately 2.
5 volts) 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.
TO-92 1 1.
Ref 2.
Anode 3.
Cathode 8-DIP 8-SOP 1 1 1.
Cathode 2.
3.
4.
5.
7.
NC 6.
Anode 8.
Ref 1.
Cathode 2.
3.
6.
7.
Anode 4.
5.
NC 8.
Ref Internal Block Diagram REFERENCE CATHODE 2.
5 Vref ANODE CATHODE (K) REFERENCE (R) ANODE (A) Rev.
1.
0.
6 ©2002 Fairchild Semiconductor Corporation LM431A/LM431B/LM431C Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified.
) Parameter Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation M, Z Suffix Package N Suffix Package Operating Temperature Range LM431xC LM431xI Junction Temperature Storage Temperature Range TOPR TJ TSTG -25 ~ +85 -40 ~ +85 150 -65 ~ +150 °C °C °C °C Symbol VKA IKA IREF PD Value 37 -100 ~ +150 0.
05 ~ +10 770 1000 Unit V mA mA mW Recommended Operating Conditions Parameter Cathode Voltage Cathode Current Symbol VKA IKA Min VREF 1.
0 Typ Max 36 100 Unit V mA 2 LM431A/LM431B/LM431C Electrical Characteristics (TA = +25°C, unless otherwise specified) Parameter Reference Input Voltage Deviation of Reference Input Voltage OverTemperature Ratio of Change in Reference In...


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