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Announcement: Introducing HL8545/G: Quad-Channel 50 mΩ High-Side Switch for Advanced Automotive Applications


The HL8512/22 family of E-Fuse are designed to protect circuitry on the output (OUT) from transients on power bus (IN) and large inrush current and protect the power bus from undesired output shorts and unexpected over-load condition.

When the output ramps up, inrush current is limited by limiting the slew rate of output voltage. The slew rate is controlled by a small capacitor at SS pin. An internal small current source charges the SS pin external capacitor. The output voltage tracks the SS pin voltage with a constant ratio until internal power MOSFET is fully turned on. When user leaves SS pin floating, the output typical ramps up time is 0.4 ms.

For more detailed description of the device, please download a product brief.



  • Integrated 23 mΩ power FET
  • Operating voltage range
    • HL8512: 4.5 V – 13.8 V
    • HL8522: 4.5 V – 5.5 V
  • Output over-voltage clamp
    • HL8512: 16 V maximum clamp voltage
    • HL8522: 6.75 V maximum clamp voltage
  • Thermal fault protection
    • HL8512FN01/22FN01: auto retry
    • HL8512FN02/22FN02: latch off
  • Programmable output ramps up rate
  • Programmable UVLO
  • Programmable, high accuracy current limit range from 1 A to 5 A
  • Reverse current blocking control
  • Meet the IEC 62368 requirements (single point failure and Annex G.9)
  • DFN-10L 3mm x 3mm

Block Diagram

HL8512 - HMI Main Photo

For more information or a full datasheet request, please contact the factory at

Related Products

Part Description
HL8511 12V Input Voltage 5A Continuous Load E-Fuse
HL8521 5V Input Voltage 5A Continuous Load E-Fuse
HL8522 5V Input Voltage 5A Continuous Load E-Fuse