Voltage Regulators
AN1431T, AN1431M
Variable output shunt regulator
I
Overview
The AN1431T and AN1431M are highly accurate
stabilized power supplies in which the output voltage can
be adjusted in the range from approximately 2.5 to 36V
under the operating temperature by using the external re-
sistor. Because of its fast rising characteristic, it can be used
as a Zener diode and has the wide application.
AN1431T
5.0±0.2
Unit: mm
4.0±0.2
(1.0)
5.1±0.2
2.3±0.2
0.6±0.15
(1.0)
13.5±0.5
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Features
•
High precision reference voltage: 2.5V (allowance:
±2%)
•
High temperature stability: 17ppm/°C typ.
•
Output voltage externally adjustable: 2.5 to 36V
•
Fast rising output
•
Low input impedance: 0.2Ω typ.
•
Low output noise voltage
2.54
0.43
+0.1
–0.05
0.43
+0.1
–0.05
2 3 1
SSIP003-P-0000
AN1431M
4.6 max.
1.8 max.
Unit: mm
1.6 max.
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Block Diagram
(AN1431T)
2.6 typ.
Current
Source
Output Tr
Error
Amp.
−
Voltage
Reference
R
V
KA
=
V
REF
(1
+
1
)
+
I
REF
· R
1
R
2
R
2
=
2.5kΩ
0.48 max.
1.5
3.0
0.58 max.
1.5
0.8 min.
+
4.25 max.
2.6 max.
0.44 max.
1
(3)
I
K
3
(2)
2
(1)
I
REF
V
KA
V
REF
3
2
1
V
1
R
1
R
2
HSIP003-P-0000B
Note) The packages (SSIP003-P-0000 and HSIP003-
P-0000B) of this product will be changed to
lead-free type (SSIP003-P-0000S and HSIP003-
P-0000Q). See the new package dimensions
section later of this datasheet.
Note) The number in ( ) shows the pin number for the AN1431M.
I
Pin Descriptions
•
AN1431T
Pin No.
1
2
3
Cathode
Reference pin
Anode
Description
•
AN1431M
Pin No.
1
2
3
Anode
Cathode
Description
Reference pin
Publication date: December 2001
SFF00001CEB
1
PANASONIC [ PANASONIC SEMICONDUCTOR ]
