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TL431-Q1 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
TL431-Q1 ADJUSTABLE PRECISION SHUNT REGULATOR TI
Texas Instruments TI
TL431-Q1 Datasheet PDF : 23 Pages
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TL431-Q1
ADJUSTABLE PRECISION SHUNT REGULATOR
SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS
STABILITY BOUNDARY CONDITIONS
FOR ALL TL431 AND TL431A DEVICES
(EXCEPT FOR SOT23-3, SC-70, AND Q-TEMP DEVICES)
100
A VKA = Vref
90 B VKA = 5 V
C VKA = 10 V
80 D VKA = 15 Vf
TA = 25°C
B
70
60
Stable
50
Stable
C
A
40
30
D
20
10
0
0.001
0.01
0.1
1
10
CL − Load Capacitance − µF
150
IKA
+
CL
VBATT
TEST CIRCUIT FOR CURVE A
IKA
R1 = 10 k
150
CL
R2
+
VBATT
TEST CIRCUIT FOR CURVES B, C, AND D
STABILITY BOUNDARY CONDITIONS
FOR ALL TL431B, TL432, SOT-23, SC-70, AND Q-TEMP DEVICES
100
A VKA = Vref
90 B VKA = 5 V
C VKA = 10 V
80 D VKA = 15 Vf
70
TA = 25°C
60
Stable
50
A
40
30
20
10
B
C
Stable
A
D
B
0
0.001
0.01
0.1
1
10
CL − Load Capacitance − µF
The areas under the curves represent conditions that may cause the
device to oscillate. For curves B, C, and D, R2 and V+ were adjusted
to establish the initial VKA and IKA conditions with CL = 0. VBATT and
CL then were adjusted to determine the ranges of stability.
Figure 16
150
IKA
+
CL
VBATT
TEST CIRCUIT FOR CURVE A
IKA
R1 = 10 k
150
CL
R2
+
VBATT
TEST CIRCUIT FOR CURVES B, C, AND D
12
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