TLV431 Datasheet, PDF (1/14 Pages) Texas Instruments – LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

A Product Line of
Diodes Incorporated
TLV431
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.
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
Pin Assignments
TLV431_H6 (SC70-6)
CATHODE 1
6 ANODE
N/C^‡ 2
5 NC^‡
REF 3
4 NC
(Top View)
TLV431_F (SOT23)
REF 1
3 ANODE
CATHODE 2
(Top View)
TLV431_E5 (SOT25)
N/C 1
5 ANODE
N/C^‡ 2
CATHODE 3
4 REF
(Top View)
Typical Application Circuit
Secondary side
regulated rail
Primary side
controller
3.3V
TLV431
Document number: DS32088 Rev. 4 - 2
1 of 14
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November 2010
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