TLV431_08 Datasheet, PDF (1/16 Pages) Zetex Semiconductors – 1.24V Cost effective shunt regulator

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 125°C
• Reference Voltage Tolerance at 25°C
• 0.5%............TLV431B
• 1%...............TLV431A
• Typical temperature drift
• 4 mV (0°C to 70°C)
• 6 mV (-40°C to 85°C)
• 11mV (-40°C to 125°C)
• 80µA Minimum cathode current
• 0.25Ω Typical Output Impedance
• Adjustable Output Voltage ..... V_REF to 18V
Applications
• Opto-coupler linearisation
• Linear regulators
• Improved Zener
• Variable reference
TLV431_F (SOT23)
REF 1
3 ANODE
CATHODE 2
TLV431_H6 (SC70-6)
CATHODE 1
6 ANODE
N/C^‡ 2
5 NC ^‡
REF 3
4 NC
TLV431_E5 (SOT23-5)
N/C 1
N/C ^‡ 2
5 ANODE
CATHODE 3
4 REF
‡ Connected internally to substrate; should be
left floating or connected to anode
Order Information
TOL Order code
1%
0.5%
TLV431AE5TA
TLV431AFTA
TLV431AH6TA
TLV431BE5TA
TLV431BFTA
TLV431BH6TA
Pack
SOT23-5
SOT23
SC70-6
SOT23-5
SOT23
SC70-6
Part
mark
V1A
V1A
V1A
V1B
V1B
V1B
Status
Active
Active
Active
Active
Active
Active
Reel Size
(inches)
7
7
7
7
7
7
Tape width
(mm)
8
8
8
8
8
8
Quantity
per reel
3000
3000
3000
3000
3000
3000
Issue 1 - June 2008
1
© Zetex Semiconductors plc 2008
www.zetex.com