APL1431A(2008) Ver la hoja de datos (PDF) - Anpec Electronics
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APL1431A Datasheet PDF : 15 Pages
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APL1431
Adjustable Precision Shunt Regulator
Features
• Precise Reference Voltage to 2.500V
• Guaranteed 0.5% or 1% Reference Voltage
Tolerance
• Sink Current Capability , 1mA to 100mA
• Quick Turn-on
•
Adjustable Output Voltage , V = V to 20V
O
REF
• Low Operational Cathode Current , 250µA
Typical
• 0.1Ω Typical Output Impedance
• SOT-23 , SOT-89 and TO-92 Packages
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Linear Regulators
• Adjustable Power Supply
• Switching Power Supply
Symbol
REF
Anode
Cathode
Functional Diagram
Cathode
REF
+
_
Vref
General Description
The APL1431 is a 3-terminal adjustable voltage refer-
ence with specified thermal stability over applicable
commercial temperature ranges. Output voltage may
be set to any value between VREF(2.5 V) and 20 V with
two external resistors (see Figure 2). When used with
an photocoupler, the APL1431 is an ideal voltage ref-
erence in isolated feedback circuits for 2.5V to 12V
switching-mode power supplies. This device has a typi-
cal output impedance of 0.1Ω. Active output circuitry
provides a very sharp turn-on characteristic, making
the APL1431 excellent replacements for zener diodes
in many applications, including on-board regulation and
adjustable power supplies.
Pin Configuration
ANODE
3
1
2
CATHODE REF
SOT-23 (Top View)
1
2
3
CATHODE ANODE REF
SOT-89 (Top View)
1 REF
2 ANODE
3 CATHODE
TO-92 (Top View)
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.
1
Rev. A.4 - Mar., 2008
www.anpec.com.tw
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