NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
100
IK
(mA)
80
60
40
(1)
Stable
Oscillation
(1)
Stable
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20
0
10−1
1
10
102
103
104
CL (nF)
Tamb = 25 C
(1) VKA = Vref
VKA = 5 V: no oscillation
VKA = 10 V: no oscillation
VKA = 15 V: no oscillation
Fig 26. TL431XFDT: Cathode current as a function of load capacitance; typical values
150 Ω
IK
CL
VBATT
R1 = 10 kΩ
IK
CL
R2
150 Ω
VBATT
GND
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VKA = Vref
Tamb = 25 C
Fig 27. Test circuit (1) to Figure 26
GND
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VKA > 5 V: stable operation
Tamb = 25 C
Fig 28. Test circuit (2) to Figure 26
TL431 family
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 01 September 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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