UTC TL432
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R103-009,D
1.25V PRECISION ADJUSTABLE
SHUNT REFERENCE / AMPLIFIER
DESCRIPTION
The UTC TL432 is a three-terminal adjustable shunt
regulator highly accurate 1.25V bandgap reference with a
0.5% tolerance. The device offers thermal stability, wide
operating current (50mA) and an extended temperature
range of 0
to 105C for operation in power supply
applications. The UTC TL432 offers a wide operating
voltage range of up to 12V and is an excellent choice for
voltage reference requirements in an isolated feedback circuit
for 3.0V to 3.3V switching mode power supplies. The tight
tolerance quarantees a lower design cost for the power
supply manufacturer by virtually eliminating the need for an
extra power supply manufacturing process of the power
supply.
FEATURES
*Temperature-Compensated:50ppm/
C
*Internal amplifier with 50mA capability
*Nominal temperature range extended to 105
C
*Low frequency dynamic output impedance:<150mohm
*Low Output Noise
TO-92
1
SOP-8
SOT-89
1
1
SOT-25
SOT-23
1
3
2
2
3
5
4
SOP-8 1: Cathode; 2,3,6,7: Anode
8: Ref. ; 4,5: N.C.
TO-92 1: Ref. ; 2: Anode ; 3: Cathode
SOT-89 1: Ref. ; 2: Anode ; 3: Cathode
SOT-23 1: Cathode; 2: Ref. ; 3: Anode
SOT-25 1,2: NC; 3: Cathode; 4: Ref.; 5: Anode
BLOCK DIAGRAM
1.25V
CATHODE(K)
ANODE(A)
REFERENCE(R)
+
-
+
-
UTC TL432
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R103-009,D
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL
VALUE
UNIT
Cathode-Anode Reverse Breakdown
V
KA
12 V
Anode-Cathode Forward Current
I
AK
1
A
Operating Cathode Current
I
KA
50
mA
Reference Input Current
I
REF
1 mA
Junction Temperature
Tj
150
C
Storage Temperature
Tstg
-65 ~ +150
C
Lead Temperature, Soldering 10
Seconds
T
L
300
C
Note: Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to
the device. This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated-in the operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect reliability.
RECOMMENDED OPERATING CONDITIONS
PARAMETER SYMBOL MIN
TYP
MAX
UNIT
Cathode Voltage
V
KA
V
REF
12 V
Cathode Current
I
K
5 10
mA
TYPICAL THERMAL RESISTANCES
PACKAGE
JA
JC
TYPICAL
DERATING
TO-92
160
C/W 80C/W 6.3mW/C
SOP-8
-175
C/W -45C/W 5.7mW/C
SOT-89
110
C/W 8C/W 9.1mW/C
SOT-23 / SOT-25
575
C/W 150C/W 1.7mW/C
ELECTRICAL CHARACTERISTICS
Electrical characteristics are guaranteed over full junction temperature range (0~105
C). Ambient temperature must
be derated based on power dissipation and package thermal characteristics. The conditions are V
KA
=V
REF
and
I
K
=10mA unless otherwise stated.
PARAMETER SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Output Voltage
TL432
1%
TL432
2%
V
REF
I
K
=10mA,Tj=25
C, V
K
=V
REF
1.237
1.225
1.250
1.250
1.263
1.275
V
Line Regulation
V
REF
V
K
=1.25 to 15V
10
15
mV
Load Regulation
V
REF
I
K
=5 to 50mA
6
15
mV
Temperature Deviation
V
REF
0<Tj<105
C
2 6
mV
Reference Input Current
I
REF
3
6
A
Reference Input Current
Temperature Coefficient
I
REF
0<Tj<105
C
0.3 0.6
A
Minimum Cathode Current for
Regulation
I
K(MIN)
4 5
mA
Off State Leakage
I
K(MIN)
V
REF
=0V,V
KA
=15V
500
nA
NOTE: Temperature deviation is defined as the maximum deviation of the reference over the given temperature
range and does not imply an incremental deviation at any given temperature.
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