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STMicro voltage reference offers controlled output

Posted: 13 May 2004 ?? ?Print Version ?Bookmark and Share

Keywords:stmicroelectronics? shunt voltage reference? ts3431? zener diode?

The new low-voltage shunt voltage reference from STMicroelectronics is claimed by the company to provide a precisely controlled output.

Designed for computer motherboards and STBs, instrumentation, battery chargers, switch-mode power supplies (SMPS) and battery-operated equipment, the TS3431 can be used to replace Zener diodes.

According to STMicro, when the reference is used in the feedback control loop of an SMPS, it will enable it to generate low voltages, such as 3.3V or 3V. Other typical applications include shunt or series regulators, voltage monitors and error amplifiers.

The reference can be programmed with an external resistor bridge to output any voltage from 1.24V to 24V. It will then hold that voltage with an accuracy of 2 percent, 1 percent or 0.5 percent, depending on which version the user chooses.

The device will sink between 400?A and 100mA of current and maintain its accuracy over the industrial operating temperature range of -40C to 125C. Offered in two packages (SOT23-3L or TO-92), it is priced at 12 cents in quantities of 1,000 units. Additional information is available on the company's website.





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