Linear Technology has announced an MP-grade version of the LT1431, a three-terminal adjustable shunt voltage regulator that operates over a -55 to +150°C junction temperature range. The regulator has a 100mA sink capability, 0.4% initial reference voltage accuracy and a ±1.4% maximum voltage drift over temperature. On-chip divider resistors allow the regulator to be configured as a 5V shunt regulator. By adding two external resistors, the output voltage may be set to any value between 2.5 and 36V. The nominal internal current limit of 100mA may be decreased by including one external resistor.
Active output circuitry provides a sharp turn-on characteristic to replace the zener diodes in onboard regulation, adjustable power supplies, and isolated switching power supplies. The regulator is available in an SO-8 plastic package.
