ZXTR1005K4 and ZXTR1005PD8 High-Voltage Regulators

By Diodes Incorporated 69

ZXTR1005K4 and ZXTR1005PD8 High-Voltage Regulators

Diodes Incorporated introduced a pair of high-voltage linear regulators suitable for 48 VDC power systems in telecom, networking, and Power over Ethernet (PoE) equipment. Integrating several components into TO252-4 and PowerDI5060-8 packages, the ZXTR1005K4 and ZXTR1005PD8 help minimize circuit footprint while providing a fixed 5 V (±2%) output and a high drive capability of 50 mA.

For high-voltage regulation tasks, where industry-standard linear regulators cannot be used, the ZXTR1005 provides a cost-effective alternative that offers a significant improvement in supply reliability. The regulated 5 V output enables microcontrollers to be powered from 48 V telecom rails, while the devices’ 100 V tolerant inputs cope with any transient conditions.

The ZXTR1005’s high-performance line and load regulation capability also ensures transient voltage drops will not result in latch-up, thereby safeguarding continuous operation of the voltage supply. To simplify regulator control and aid diagnostics, the device includes an active-high enable pin allowing the output to be toggled on and off.

  • Series linear regulator using emitter-follower stage
  • Input voltage = 10 V to 100 V
  • Output voltage = 5 V ±2%
  • ±4% tolerance over -55 to +125°C
  • Output current up to 50 mA
  • Toggle output ON / OFF with enable pin
  • Totally lead-free and fully RoHS-compliant
  • Halogen- and antimony-free “Green” device
  • Supply voltage regulation in:
    • Networking
    • Telecom
    • Power over Ethernet (PoE)