General Description

The APL431L is a 3-terminal low voltage adjustable precision reference with specified thermal stability over applicable commercial temperature ranges. Output voltage may be set to any value between Vref (1. 24 V) and 20 V with two external resistors (see Figure 2). When used with an photocoupler, the APL431L is an ideal voltage reference in isolated feedback circuits for 3V to 12V switching-mode power supplies. This device has a typical output impedance of 0.1?. Active output circuitry provides a very sharp turn-on characteristic,making the APL431L excellent replacements for zener diodes in many applications, including on-board regulation and adjustable power supplies.

Features

? Precise Reference Voltage to 1.24V

? Guaranteed 0.5 or 1 Reference Voltage Tolerance

? Sink Current Capability, 80uA to 100mA

? Quick Turn-on

? Adjustable Output Voltage, VO = VREF to 20V

? Low Operational Cathode Current, 80μA Typical

? 0.1? Typical Output Impedance

? SOT-23-3, SOT-23-5, TO-92 and SOT-89 Packages

? Lead Free Available (RoHS Compliant)

Applications

? Linear Regulators

? Adjustable Power Supply

? Switching Power Supply