n Overview
The AN1431T and AN1431M are high accuracy stabilized
power supplies in which the output voltage can be adjusted in
the range from approx. 2.5 to 36V by using the external resistor
under the operating temperature. Because of its fast rise charac-
teristics, it can be replaced with Zener diode and has the wide
application range.
n Features
• High precision reference voltage : 2.5V±2%
• High-temperature stability : 17ppm/˚C typ.
• Output voltage externally adjustable : 2.5 to 36V
• Fast rise
• Low input impedance : 0.2Ω (typ.)
• Low output noise voltage
AN1431T, AN1431M
Surface-mount Adjustable Output Shunt Regulator
Unit : mmAN1431T
JEDEC : TO-92 (SSIP003-P-0000)
5.0– 0.2
5.1
–
0.2
13.5
–
0.5
0.45
2.3– 0.22.54
321
+0.2
– 0.1
4.0– 0.2
1
3 2 1
3 2
–
Error
Amp.
+
Current
Source
Voltage
Reference
Output Tr
IK
V1
R1
R2
R1
R2
IREF
VREF
VKA
VKA = VREF (1 + ) + IREF · R1
R2 = 2.5kΩ
Pin number in is for the AN1431T.
Pin number in is for the AN1431M.
n Block Diagram
Unit : mmAN1431M
JEDEC : TO-92 (SSIP003-P-0000)
5.0– 0.2
5.1
–
0.2
13.5
–
0.5
0.45
2.3– 0.22.54
321
+0.2
– 0.1
4.0– 0.2
n Pin Name
〈AN1431T〉
Pin No. Pin name
1
2
3
Cathode
Reference pin
Anode
〈AN1431M〉
Pin No. Pin name
1
2
3
Reference pin
Anode
Cathode