APL1431L
Low Voltage Adjustable Precision Shunt Regulator
Features
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•
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•
•
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•
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Precise Reference Voltage to 1.24V
Guaranteed 0.5% or 1% Reference Voltage
Tolerance
Sink Current Capability , 60mA to 100mA
Quick Turn-on
Adjustable Output Voltage , V
O
= V
REF
to 20V
Low Operational Cathode Current , 60mA
Typical
0.1Ω Typical Output Impedance
SOT-23-5 Packages
General Description
The APL1431L is a 3-terminal low voltage adjust-
able precision reference with specified thermal sta-
bility over applicable commercial temperature ranges
. Output voltage may be set to any value between
V
REF
(1.24 V) and 20 V with two external resistors
(see Figure 2) . When used with an photocoupler ,
the APL1431L is an ideal voltage reference in iso-
lated feedback circuits for 1.24V to 12V switching-
mode power supplies . This device has a typical
output impedance of 0.1Ω
.
Active output circuitry
provides a very sharp turn-on characteristic , mak-
ing the APL1431L excellent replacements for zener
diodes in many applications , including on-board
regulation and adjustable power supplies .
AN O DE
RE F
Applications
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•
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Linear Regulators
Adjustable Power Supply
Switching Power Supply
5
1
2
4
3
NC
NC
C A T H O DE
Symbol
REF
Anode
Cathode
Functional Diagram
C athode
R EF
+
−
V
REF
Anode
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
ANPEC Electronics Corp.
Rev. A.4 - May., 2003
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
