Regulator Transistor Raises Power Density in 48V Systems
Diodes Incorporated has introduced new space-saving package options for its ZXTR2000 series of high-voltage linear regulator transistors designed for 48V circuits in networking, telecom and power-over-ethernet (POE) equipment.
By monolithically integrating several discrete components into the ultra-low profile PowerDI5 and the higher power dissipation TO252 (DPAK) packaging, the regulator transistors offer designers the opportunity to increase power density in 48V DC primary-side and fan control applications.
Diodes say their regulators are able to operate where standard linear regulators cannot, the high-voltage ZXTR2005K, ZXTR2008K and ZXTR2012K (TO252) and the ZXTR2005P5, ZXTR2008P5 and ZXTR2012P5 (PowerDI5) produce fixed voltages of 5V, 8V and 12V, respectively, from nominal 48V inputs.
Device inputs are actually tolerant up to a maximum of 100V, meaning all regulator transistors offer plenty of headroom in the event of transient over-voltage conditions. High-performance line and load regulation also ensures transient voltage drops do not result in latch-up, enabling continuous supply operation.
