TL432
SOT-23 Encapsulate Adjustable Reference Source
TL432
Adjustable Accurate Reference Source
DEVICE DESCRIPSION
The TL432 is a three-terminal Shunt Voltage Reference providing a
highly accurance 1.24V. The TL432 thermal stability and wide operating
current, makes is sritable for all variety of applications that are looking
for a low cost solution with high performance.
SOT-23
1. REFERENCE
2. CATHODE
FEATURES
Low dynamic output impedance
The effective temperature compensation in the working
range of full temperature
Low output noise voltage
Fast on -state response
Sink current capability of 0.1mA to100mA
APPLICATION
Shunt Regulator
High-Current Shunt Regulator
Precision Current Limiter
3. ANODE
ABSOLUTE MAXIMUM RATINGS (Operating temperature rangeapplies unless otherwise specified)
Parameter
Cathode Voltage
Cathode Current Range (continuous)
Reference lnput Current Range
Power Dissipation
Thermal Resistance from Junction to Ambient
Operating Temperature
Junction Temperature
Storage Temperature
Symbol
V
KA
I
KA
I
ref
P
D
R
θJA
T
opr
T
J
T
stg
Value
18
100
6
350
357
0~+70
150
-65~+150
Units
V
mA
μA
mW
℃/W
℃
℃
℃
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TL432
ELECTRICAL CHARACTERISTICS (T
a
=25℃ unless otherwise specified)
Parameter
Reference input voltage (Fig 1)
Deviation of reference voltage over full
temperature range (Fig 1)
Ratio of change in reference input voltage to
the change in cathode voltage (Fig 2)
Deviation of reference input current over full
temperature range (Fig 2)
Minimum cathode current for regulation
(Fig 1)
Off-state cathode current(Fig 3)
Dynamic impedance
Symbol
V
ref
△
V
ref(DEV)
△
V
ref
/
△
V
KA
Test
conditions
Min
1.2214
Typ
Max
1.2586
16
2.4
Unit
V
mV
mV/V
V
KA
=V
REF
, I
KA
=10mA
V
KA
=V
REF
, I
KA
=10mA
0℃≤T
a
≤70℃
I
KA
=10mA,
△
V
KA
=1.25V~15V
l
KA
=10mA, R
1
=10kΩ,
R
2
=∞, 0℃≤T
a
≤70℃
V
KA
=V
REF
V
KA
=15V,V
REF
=0
V
KA
=V
REF,
l
KA
=0.1 ~20mA,
f≤1.0kHz
△
l
ref
/
△
T
0.6
μA
I
KA(min)
I
off
Z
KA
0.1
0.5
0.5
mA
μA
Ω
CLASSIFICATION OF Vref
Rank
Range
1%
1.2276~1.2524
1.5%
1.2214~1.2586
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TL432
Typical Characteristics
Cathode Current versus
Cathode Voltage
100
KA
(mA)
KA
50
I
K
, CATHODE CURRENT
0
-50
ref
V
KA
=V
ref
T
a
=25
℃
-100
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
V
KA
, CATHODE VOLTAGE
(V)
Cathode Current versus
Cathode Voltage
400
Test Circuit for V
KA
=V
ref
I
K
, CATHODE CURRENT
(uA)
300
200
I
KA(min)
100
0
-100
V
KA
=V
ref
T
a
=25
℃
-200
-1.0
-0.5
0.0
0.5
1.0
1.5
V
KA
, CATHODE VOLTAGE
(V)
1300
Reference Input Voltage versus
Ambient Temperature
(mV)
V
ref
, REFERENCE INPUT VOLTAGE
1275
1250
1225
1200
V
KA
=V
ref
I
K
=10mA
1175
-40
-20
0
20
40
60
80
100
T
a
, AMBIENT TEMPERATURE
(
℃
)
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TL432
0
Change in Reference Input
Voltage versus Cathode Voltage
I
K
=10mA
T
a
=25
℃
(mV)
△
V
ref
, REFERENCE INPUT VOLTAGE
-4
-8
-12
-16
-20
0
3
6
9
12
15
V
KA
, CATHODE VOLTAGE
(V)
Test Circuit for V
KA
=V
ref
(1+R1/R2)+R1*I
ref
500
Reference Input Current versus
Ambient Temperature
(nA)
I
ref
, REFERENCE INPUT CURRENT
400
300
200
100
I
K
=10mA
0
-40
R
1
=10KΩ
-20
0
20
40
60
80
100
T
a
, AMBIENT TEMPERATURE
(
℃
)
Test Circuit for I
ref
Off-State Cathode Current
versus Ambient Temperature
40
(nA)
I
off
, OFF-STATE CATHODE CURRENT
35
30
25
20
15
10
5
V
KA
=15V
V
ref
=0V
0
-40
-20
0
20
40
60
80
100
Test Circuit for I
off
T
a
, AMBIENT TEMPERATURE
a
(
℃
)
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TL432
PACKAGE OUTLINE
Plastic surface mounted package; 3 leads
SOT-23
5 of 5
LED专区
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