
AMC D
OC
. #: AMC431_C
November 2002
A
DD MICROTECH CORP.
Copyright
2002, ADD Microtech Corp. 1 www.addmtek.com
V
REF
CATHODE
ANODE
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
200m
. 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.
APPLICATIONS
!
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 200m
;
#
Adjustable output voltage from V
REF
to 36V
#
Available in 3L-TO92 and surface mount
SOT89, SOT23 and 8 pin S.O.I.C. packages
#
Low output noise
#
Typical equivalent full range temperature
coefficient of 30ppm/°C
#
Pin assignment identical to earlier TL431
series.
FEATURES
PACKAGE PIN OUT
3-Pin Plastic TO-92
(Top View)
8-Pin Plastic S.O.I.C.
Surface Mount
(Top View)
!
Voltage Reference
!
Precision shunt regulator
!
High current shunt regulator
!
PWM down converter with
reference
!
Voltage monitor
ORDER INFORMATION
TO-92
LP
3-pin
AMC431CLP
AMC431LP
AMC431BLP
SOIC
SOT-89
SOT-23
SOT-23
T
A
(°C)
Initial
Tolerance
DM
8-pin
1.5%
1%
0.5%
Note: 1. For AMC431DB and AMC431BDB.
2. For AMC431RDB and AMC431BRDB.
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.
PK
3-pin
DB
3-pin
DB
3-pin
--
--
--
--
AMC431DM
--
AMC431PK
AMC431BPK
AMC431DB
AMC431BDB
AMC431RDB
AMC431BRDB
0 to 70
P
RECISION
A
DJUSTABLE
S
HUNT
V
OLTAGE
R
EFERENCE
AMC431
CATHODE
ANODE
V
REF
CATHODE
ANODE
V
REF
ANODE
NC
ANODE
ANODE
NC
V
REF
ANODE
CATHODE
CATHODE
V
REF
ANODE
3-Pin Plastic SOT-89
Surface Mount
(Top View)
(Note 1)
3-Pin Plastic SOT-23
Surface Mount
(Top View)
(Note 2)
3-Pin Plastic SOT-23
Surface Mount
(Top View)