ZTL431, ZTL432
Cost effective adjustable precision shunt regulator
Description
The ZTL431 and ZTL432 are three terminal
adjustable shunt regulators offering excellent
temperature stability and output current
handling capability up to 100mA. The output
voltage may be set to any chosen voltage
between 2.5 and 20 volts by selection of two
external divider resistors.
The devices can be used as a replacement for
zener diodes in many applications requiring an
improvement in zener performance.
The ZTL432 has the same electrical specifications
as the ZTL431 but has a different pin out in
SOT23 (F-suffix) and SOT23F (FF-suffix).
Both variants are available in 2 grades with
initial tolerances of 1% and 0.5% for the A and
B grades respectively.
These are functionally equivalent to the TL431/
TL432 except for maximum operation voltage,
and have an ambient temperature range of -40
to 125°C as standard.
Features
•
•
Temperature range ................ -40 to 125°C
Reference voltage tolerance at 25°C
•
•
•
•
•
0.2
0.5% ..................................... B grade
1% ......................................... A grade
typical output impedance
Applications
•
•
•
•
Opto-coupler linearization
Linear regulators
Improved zener
Variable reference
Sink current capability ...... 1mA to 100mA
Adjustable output voltage ...... V
REF
to 20V
Pin connections
ZTL431_F SOT23
ZTL431_FF SOT23F
(top view)
ZTL432_F SOT23
ZTL432_FF SOT23F
(top view)
ZTL431_H6 SC70-6
(top view)
Cathode 3
1 Anode
Ref 2
Ref 3
1 Anode
Cathode 2
Cathode 1
N/C
†
2
REF 3
6 Anode
5 N/C
†
4 NC
† Connected internally to
substrate; should be left
floating or connected to Anode
ZTL431ASE5 SOT235
(top view)
ZTL431_E5 SOT235
(top view)
Cathode 1
Anode 2
Ref 3
5 N/C
N/C 1
N/C* 2
5 Anode
4 N/C
Cathode 3
4 Ref
*
must be left floating
or connected to pin 5
© Zetex Semiconductors plc 2007
ZETEX [ ZETEX SEMICONDUCTORS ]
