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TLV431
TLV431
Document number: DS32088 Rev. 5 - 2
1 of 14
www.diodes.com
April 2011
© Diodes Incorporated
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Product Line o
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Diodes Incorporated
1.24V COST EFFECTIVE SHUNT REGULATOR
Description
The TLV431 is a three terminal adjustable shunt regulator
offering excellent temperature stability and output current
handling capability up to 20mA. The output voltage may be
set to any chosen voltage between 1.24 and 18 volts by
selection of two external divider resistors.
The TLV431 can be used as a replacement for zener
diodes in many applications requiring an improvement in
zener performance.
The TLV431 is available in 2 grades with initial tolerances
of 1% and 0.5% for the A and B grades respectively.
Pin Assignments
TLV431_H6 (SC70-6)
(Top View)
TLV431_F (SOT23)
(Top View)
TLV431_E5 (SOT25)
(Top View)
‡ Pin should be left floating or connect to anode
Features
• Low Voltage Operation V
REF
= 1.24V
• Temperature range -40 to 125ºC
• Reference Voltage Tolerance at 25°C
o 0.5% TLV431B
o 1% TLV431A
• Typical temperature drift
o 4 mV (0°C to 70°C)
o 6 mV (-40°C to 85°C)
o 11mV (-40°C to 125°C)
• 80µA Minimum cathode current
• 0.25Ω Typical Output Impedance
• Adjustable Output Voltage V
REF
to 18V
• Lead Free Finish. RoHS Compliant with “Green”
Molding Compound (No Br, Sb)
• Qualified to AEC-Q100
Typical Application Circuit
6 ANODE
CATHODE 1
REF
3
N/C
‡
2
4 NC
5 NC
‡
3 ANODE
REF 1
CATHODE
2
5 ANODE
N/C 1
CATHODE
3
N/C
‡
2
4 REF
3.3V
Secondary side
regulated rail
Primary side
controller
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