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Shunt Regulator and Voltage Reference with Reduced Regulation Current


The MMTL431B extends our family of Shunt Regulators and Precision Voltage References. It offers a reduced minimum regulation current I_K(min) of typically 30 µA, and maximum 300 µA. This makes it ideally suited for secondary side control of flyback converters, used in offline power supplies and battery chargers, but also replacement of low voltage Zener diodes (< 10 V). Especially in latter case it is often desired to have a temperature compensated, stabilized voltage at low current consumption. With just few external components, the MMTL431B allows for exactly such function.


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