AMC431
www.addmtek.com
DESCRIPTION
The AMC431 is a three-terminal adjustable shunt
voltage regulator with specified thermal stability and
pin-to-pin compatible with the earlier 431 series. The
output voltage can be adjusted to any value between V
REF
and 36V by using two external resistors. The AMC431
offers low output impedance for improved load regulation
with a typical output impedance of 200mΩ. Because of
the active output circuitry, the AMC431can replace the
zener diodes in applications such as switching power
supplies, OVP crowbar circuits, references for A/D, D/A
converters with improved turn-on characteristics.
P
RECISION
A
DJUSTABLE
S
HUNT
V
OLTAGE
R
EFERENCE
FEATURES
Initial voltage reference accuracy of 0.5%,
1.0%, and 1.5%
Sink current capability from 1mA to 100mA
Typical output dynamic impedance less than
200mΩ;
Adjustable output voltage from VREF to 36V
Available in 3L-TO92 and surface mount SOT89,
SOT23.
Low output noise
Typical equivalent full range temperature
coefficient of 30ppm/°C
Pin assignment identical to earlier TL431 series.
PACKAGE PIN OUT
CATHODE
ANODE
ANODE
V
REF
V
REF
CATHODE
APPLICATIONS
Voltage Reference
Precision shunt regulator
High current shunt regulator
PWM down converter with
reference
Voltage monitor
3-Pin Plastic TO-92
(Top View)
CATHODE
ANODE
V
REF
3-Pin Plastic SOT-23
Surface Mount
(Top View
)
(Note 1)
V
REF
ANODE
CATHODE
3-Pin Plastic SOT-89
Surface Mount
(Top View)
3-Pin Plastic SOT-23
Surface Mount
(Note 2)
(Top View)
Initial
T
A
(°C)
Tolerance
LP
TO-92
3-pin
ORDER INFORMATION
SOT-89
SOT-23
PK
DB
3-pin
3-pin
--
AMC431PK
AMC431PKF(Lead Free)
AMC431BPK
--
--
AMC431DB
AMC431DBF(Lead Free)
AMC431BDB
--
--
DB
SOT-23
3-pin
0 to 70
AMC431BLPF(Lead Free) AMC431BPKF(Lead Free) AMC431BDBF(Lead Free)
AMC431BRDBF(Lead Free)
Note: 1. For AMC431RDB and AMC431BRDB.
2. For AMC431DB and AMC431BDB.
3. For surface-mount and TO-92 packages in Tape & Reel, add suffix “T” (e.g., AMC431LPT, AMC431DBT).
4. For TO-92 in Tape & Box (without reel), add suffix “TB” (e.g., AMC431LPTB).
5. DB package is only available in Tape & Reel.
6. The letter “F” is marked for Lead Free process.
Copyright
©
2006 ADDtek Corp.
1
DD021_G
--
JUNE 2006
1.5%
1.5%
1%
1%
0.5%
0.5%
AMC431CLP
AMC431LP
AMC431LPF(Lead Free)
AMC431BLP
AMC431CLPF(Lead Free) --
AMC431RDB
AMC431RDBF(Lead Free)
AMC431BRDB