Voltage Regulators
1
AN1432MS
Variable output, low voltage operation shunt regulator IC
n Overview
The AN1432MS is a low voltage operation and posi-
tive voltage variable output type shunt regulator IC. Since
the output voltage is adjustable from approximately 1.26
V to 15 V, it is suitable for a power supply of small-sized
3 V-system portable equipment. Also, it contributes to the
miniaturization of set equipment by the adoption of the
small type surface mounting package.
n Features
• High precision reference voltage: 1.26 V (allowance:
– 2%)
• Low voltage operation: 1.26 V to 15 V
• Small type surface mounting package
n Applications
• Portable telephone, PHS, office automation equipment,
and other small-sized portable equipment
n Block Diagram
MINI-3D
Unit: mm
0.40
+ 0.10
– 0.05
1.45
0.65
± 0.15
0.65
± 0.15
1.50
+ 0.25 –
0.05
2.80
+ 0.20 – 0.30
21
3
0.95 0.95
1.90 ± 0.20
2.90
+ 0.20
– 0.05
0.16
+ 0.10
– 0.06
0.40
± 0.20
5

10
0 to 0.1
1.10
+ 0.20 – 0.10
1.10
+ 0.30 – 0.10
1
Ref.
Constant current source
Reference voltage
Error
amplifier
Output
transistor
AK
2
3