High-voltage regulator transistors

21 August 2013 Power Electronics / Power Management

The ZXTR2000 family of high-voltage regulators from Diodes Incorporated monolithically integrates a transistor, Zener diode and resistor into a standard SOT89 package.

Principal applications for the devices are in networking, telecom and Power-over-Ethernet (PoE) where they are ideal voltage supply regulators for primary-side controllers in 48 V DC-DC PSUs.

The ZXTR2005Z, ZXTR2008Z and ZXTR2012Z provide high-voltage regulation by taking a nominal 48 V input and generating fixed output voltages of 5 V, 8 V and 12 V, where standard linear regulators cannot be used.

The line and load regulation capabilities within the devices safeguard continuous operation by preventing latch-up from transient voltage drops. Additionally, the unique structure allows the input to successfully tolerate spurious voltages up to a maximum of 100 V, creating a safety margin in the event of transient over-voltage conditions.

For more information contact Erich Nast, Avnet Kopp, +27 (0)11 319 8600, erich.nast@avnet.eu, www.avnet.co.za

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