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PDF TLV431 Data sheet ( Hoja de datos )
| Número de pieza | TLV431 | |
| Descripción | 1.24V COST EFFECTIVE SHUNT REGULATOR | |
| Fabricantes | Diodes | |
| Logotipo |  |
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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 3 grades with initial tolerances of 1%,
0.5%, and 0.2% for the A, B and T grades respectively.
Features
• Low Voltage Operation VREF = 1.24V
• Temperature range -40 to +125°C
• Reference Voltage Tolerance at +25°C
0.2% TLV431T
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 VREF to 18V
• Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• Qualified to AEC-Q100
Typical Application Circuit
Pin Assignments
TLV431_H6 (SC70-6 [SOT363])
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)
‡ Pin should be left floating or connect to anode
Secondary side
regulated supply Optocoupler
Primary side
controller
IF
3.3 V
R3
TLV431
R1
R2
Notes:
GND
1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
TLV431
Document number: DS32088 Rev. 6 - 2
1 of 14
www.diodes.com
October 2012
© Diodes Incorporated
1 page  
Typical Characteristics (cont.)
A Product Line of
Diodes Incorporated
TLV431
TLV431
Document number: DS32088 Rev. 6 - 2
5 of 14
www.diodes.com
October 2012
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
TLV431
Application Notes (cont.)
Printed Circuit Board Layout Considerations (cont.)
AP1117 or AP1084
Vin
IB
Vin VR1 Vout
GND
R3 1.2 V
Vout
R1
TLV431
VREF
VOUT
=
VREF
1
+
R1
R2
VOUT ≥ (VREG + VREF )
R3 = VIN − (VOUT − VREG )
IB
0.1mA ≤ IB ≤ 18mA
C1
0.1µF
GND
R2
(All features of the regulator
such as short circuit
protection, thermal shutdown,
etc, are maintained.)
Figure 7. Adjustable Linear Voltage Regulator
Figure 7 is similar to Figure 6 with adjustability added. Note the addition of R3. This is only required for the AP1117 due to the fact that its ground
or adjustment pin can only supply a few micro-amps of current at best. R3 is therefore needed to provide sufficient bias current for the TLV431.
Ordering Information
Tol. Part Number
TLV431AE5TA
1% TLV431AFTA
TLV431AH6TA
0.5%
TLV431BE5TA
TLV431BFTA
TLV431BH6TA
0.2% TLV431TFTA
Package
SOT25
SOT23
SC70-6
(SOT363)
SOT25
SOT23
SC70-6
(SOT363)
SOT23
Part Mark
V1A
V1A
V1A
V1B
V1B
V1B
V1T
Status
Active
Active
Active
Active
Active
Active
Active
Reel Size
7”, 180mm
7”, 180mm
7”, 180mm
7”, 180mm
7”, 180mm
7”, 180mm
7”, 180mm
Tape Width
8mm
8mm
12mm
8mm
8mm
12mm
8mm
Quanity per
Reel
3000
3000
1000
3000
3000
1000
3000
TLV431
Document number: DS32088 Rev. 6 - 2
11 of 14
www.diodes.com
October 2012
© Diodes Incorporated
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TLV431.PDF ] | |
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