TLV431AE5TA Diodes Zetex, TLV431AE5TA Datasheet - Page 9

• Manufacturer Part Number: TLV431AE5TA
• Description: IC SHUNT REG 1.24V 1% SOT23-5
• Manufacturer: Diodes Zetex

Specifications of TLV431AE5TA

• Reference Type: Shunt, Adjustable
• Voltage - Output: 1.24 ~ 18 V
• Tolerance: ±1%
• Number Of Channels: 1
• Current - Cathode: 55µA
• Current - Output: 15mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Temperature Coefficient: -
• Current - Quiescent: -

Application Information
Printed circuit board layout considerations
The TLV431 in the SOT25 package has the die attached to pin 2, which results in an electrical contact between pin 2 and pin
5. Therefore, pin 2 of the SOT25 package must be left floating or connected to pin 5.
TLV431 in the SC70-6 package has the die attached to pin 2 and 5, which results in an electrical contact between pins 2, 5
and pin 6. Therefore, pins 2 and 5 must be left floating or connected to pin 6.
Other applications of the TLV431
It may at times be required to shunt-regulate more current than the 15mA that the TLV431 is capable of.
Figure 3 shows how this can be done using transistor Q1 to amplify the TLV431’s current. Care needs to be taken that the
power dissipation and/or SOA requirements of the transistor is not exceeded.
A very effective and simple series regulator can be implemented as shown in Figure 4 above. This may be preferable if the
load requires more current than can be provided by the TLV431 alone and there is a need to conserve power when the load is
not being powered. This circuit also uses one component less than the shunt circuit shown in Figure 3 above.
TLV431
Document number: DS32088 Rev. 5 - 2
(cont.)
Figure 3. High current shunt regulator
Figure 4. Basic series regulator
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© Diodes Incorporated
TLV431
April 2011