Diodes TLV431 - Manual (Page 11)

TLV431
Document number: DS32088 Rev. 6 - 2
11 of 14
www.diodes.com
October 2012
© Diodes Incorporated
TLV431
A Product Line of
Diodes Incorporated
Application Notes
(cont.)
Printed Circuit Board Layout Considerations (cont.)
V in V out
V
R1
R2
TLV431
GND
C1
0.1µF
REF
VR1 Vin Vout
GND
AP1117 or AP1084
1.2 V
R3
I
B
⎟
⎠
⎞
⎜
⎝
⎛ +
=
2 R
1 R
1 V V
REF OUT
) V V ( V
REF REG OUT
+ ≥
B
REG OUT IN
I
) V V ( V
3 R
− −
=
mA 18 I mA 1 . 0
B
≤ ≤
(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 Package Part Mark Status Reel Size Tape Width
Quanity per
Reel
1%
TLV431AE5TA SOT25 V1A Active 7”, 180mm 8mm 3000
TLV431AFTA SOT23 V1A Active 7”, 180mm 8mm 3000
TLV431AH6TA
SC70-6
(SOT363)
V1A Active 7”, 180mm 12mm 1000
0.5%
TLV431BE5TA SOT25 V1B Active 7”, 180mm 8mm 3000
TLV431BFTA SOT23 V1B Active 7”, 180mm 8mm 3000
TLV431BH6TA
SC70-6
(SOT363)
V1B Active 7”, 180mm 12mm 1000
0.2% TLV431TFTA SOT23 V1T Active 7”, 180mm 8mm 3000