AT431
Preliminary Product Information
1.24V Low-Voltage Adjustable Precision
Shunt Regulator
Above shows the AT4311 used in a 3.3V isolated flyback supply. Output voltage Vo can be as low
as reference voltage V (1.24V±1%). The output of the regulator, plus the forward voltage drop
ref
of the optocoupler LED (1.24+1.4=2.64V), determine the minimum voltage that can be regulated
in an isolated in an isolated supply configuration. Regulated voltage as low as 2.7V is possible
using the circuit.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
2/8/2006 REV:1.1
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
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AIMTRON [ AIMTRON TECHNOLOGY ]
