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Personal Computers
PRODUCT DESCRIPTION
The SPX431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate 0.5% bandgap reference. SPX431 acts as an
open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431 thermal stability, wide operating current
(150mA) and temperature range (0擄C to 105擄C) makes it suitable for all variety of application that are looking for a low cost solution
with high performance.
SPX431 tolerance of 0.5% is proven to be sufficient to overcome all of the other errors in the system to
virtually eliminate the need for trimming in the power supply manufactures assembly line and contribute a significant cost
savings.
The output voltage may be adjusted to any value between V
REF
and 36 volts with two external resistors. The SPX431 is operating an
extended temperature range of 0擄C to 105擄C. The SPX431 is available in TO-92, SO-8, SOT-89, and SOT-23-5 packages.
PIN CONFIGURATIONS
8-Pin Surface Mount (S)
SOT-23-5 (M5)
REF
ANODE
4
SOT-89 (M1)
TO-92 (N)
1
2
3
CATHODE
ANODE
ANODE
N/C
1
2
3
4
8
7
REF
ANODE
ANODE
N/C
5
SPX431
1
N/C
2
N/C
3
CATHODE
1
SPX431
2
3
CATHODE
REF
CATHODE
SPX431
6
5
REF
ANODE
ANODE
Top View
Top View
Top View
Bottom View
Rev. 10/30/00