Datasheet ZXRE160 (Diodes) - 3

A Product Line of Diodes Incorporated ZXRE160 Functional Block Diagram T UC NEW PROD
The ZXRE160 differs from most other shunt regulators in that it auxiliary rail voltage, or below the minimum VIN voltage. This has separate input and output pins and a low voltage reference. allows it to operate as a low-dropout voltage regulator for This enables it to regulate rails down to 600mV and makes the microprocessor/DSP/PLD cores. part ideal for isolated power supply applications that use As with other shunt regulators (and shunt references), the opto-couplers in the feedback loop and where the open-collector ZXRE160 compares its internal amplifier FB pin to a high output is required to operate down to voltages as low as 200mV. accuracy internal reference; if FB is below the reference then OUT The wide input voltage range of 2V to 18V and output voltage turns off, but if FB is above the reference then OUT sinks current range of 0.2V to 18V enables the ZXRE160 to be powered from – up to a maximum of 15mA. an auxiliary rail, while controlling a master rail which is above the ZXRE160 3 of 15 June 2012 Document number: DS35688 Rev. 2 - 2
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