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ZTL431/ZTL432
Document number: DS33263 Rev. 16 - 2
1 of 10
www.diodes.com
May 2013
© Diodes Incorporated
A
Product Line o
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Diodes Incorporated
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°C to +125°C as standard.
Pin Assignments
ZTL431_F SOT23, ZTL431_FF SOT23F
(Top View)
ZTL432_F SOT23, ZTL432_FF SOT23F
(Top View)
ZTL431_H6, SOT363
(Top View)
†Connected internally to substrate;
should be left floating or connected to Anode
ZTL431ASE5 SOT25
(Top View)
ZTL431_E5 SOT25
(Top View)
*
must be left floating or
connected to pin 5
Features
Temperature Range ................ -40°C to +125°C
Reference Voltage Tolerance at +25°C
0.5%.......................................B grade
1% .........................................A grade
0.2 typical output impedance
Sink Current Capability…….. 1mA to 100mA
Adjustable Output Voltage……V
REF
to 20V
Qualified to AEC-Q100 Standards for High Reliability
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Opto-Coupler Linearization
Linear Regulators
Improved Zener
Variable Reference
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds.
Anode
Cathode
Ref
2
1
3
Anode
Cathode
Ref
2
1
3
Anode
Cathode
Ref
2
1
3
Cathode
Ref
N/C
†
N/C
†
NC
Anode
3
2
1
4
5
6
Cathode
2
Anode
Cathode
N/C
3
1
5
4
Ref
N/C
2
Anode
Cathode
N/C
3
1
5
4
Ref
N/C*
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