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


The HL7504 is a synchronous buck converter optimized to supply different sub systems of portable applications. Its input voltage range is 2.5-5.5V. Its output voltage is a factory pre-set value between 1.05V and 3.3V.

The HL7504 can deliver up to 2.0A with 80% efficiency while maintaining over 80% efficiency at load currents as low as 10mA. It operates at a high frequency of 3MHz, which greatly reduces the value of the external components. A wide range of output capacitors can be used to optimize VOUT stability during load transients. The inductors from 1.0µH to 2.2µH may be used without affecting loop stability.

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


  • Input voltage range: 2.5-5.5V
  • Output voltages: 1.2V, 1.86V, 3.30V, 1.05V, 1.80V, 1.10V, 3.10V, 1.08V
  • Maximum output current: 2A
  • 3MHz PWM with seamless PWM/PFM switching for light-load efficiency
  • Excellent load and line transient
  • Quiescent current in PFM tristate: 60µA
  • Comprehensive protections
    • Input under-voltage lockout (UVLO)
    • Input over-voltage lockout (OVLO)
    • Over-current and short-circuit protections
    • Thermal shutdown
  • Active discharge when disabled
  • Automatic PFM
  • Enable input
  • Power good output
  • Soft start
  • 2mm x 2mm DFN-6 package

Block Diagram

HL7504 - HMI Main Photo

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

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