鈥?/div>
Battery Operating Equipment
Adjustable Supplies
Switching Power Supplies
Error Amplifiers
Single Supply Amplifier
Monitors / VCR / TV
Personal Computers
PRODUCT DESCRIPTION
The AS3431 is a 3-terminal Adjustable Shunt Voltage Regulator providing a highly accurate 0.5% bandgap reference. AS3431 acts as
an open-loop error amplifier with a 2.5V temperature compensation reference. The AS3431 thermal stability, wide operating current
(100mA) and temperature range (0擄C to 105擄C) makes it suitable for all variety of applications that are looking for a low cost solution
with high performance.
AS3431 tolerance of 0.5% is proven to be sufficient to overcome all the other errors in the system to
virtually eliminate the need for trimming in the power supply manufactures assembly line and contribute a big Cost Savings.
In the standard shunt configuration, the combination of low temperature coefficient (T.C.), sharp turn-on characteristics, low output
impedance and programmable output voltage make this precision reference an excellent error amplifier.
The AS3431 is a direct replacement for the AS431 and TL431 in low voltage, low current applications. AS3431 is also available in
SOT-89 and TO-92.
ORDERING INFORMATION
TO-92
AS3431AN
AS3431N
SOT-23- 3-PIN
AS3431AM
AS3431M
SOT-89- 3-PIN
AS3431AM1
AS3431M1
TEMP RANGE
0擄C to 105擄C
0擄C to 105擄C
Output Accuracy
0.5%
1%
The AS3431AM is 0.5% tolerance and the marking on the pin should be 鈥?431鈥?/div>
The AS3431M is 1% tolerance and the marking on the pin should be 鈥?432鈥?/div>
PIN CONNECTIONS
SOT-23
Marking & pinout for
the 1% device
ANODE
TO-92 (N)
1
2
3
SOT-23
Marking & pinout for
the 0.5% device
ANODE
SOT-89
Marking &
pinout for all
devices
3431
CATHODE
ANODE
REF
CATHODE
REF
3432
1
3431
2
3
CATHODE
REF
CATHODE
ANODE
REF
Top View
Top View
Top View
Top View
Rev. 10/11/00
1
2
3
4
