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


HL7594K is a synchronous buck converter optimized to supply different sub systems of portable applications. Its input voltage range is 2.5V to 5.5V. Its output voltage range is either 0.600V to 1.394V in 6.25mV steps or 0.27V to 0.6272V in 2.8125mV steps, programmable through an I2C interface. Its output voltage can be adjusted on the fly to provide Dynamic Voltage Scaling (DVS) function with a programmable slew rate.

HL7594K can deliver up to 3A with max 88% efficiency, while maintaining over 80% efficiency at load currents as low as 10mA. It operates at fixed frequency of 2.4MHz, which reduces the value of the external components. A wide range of output capacitors can be used to optimize VOUT stability during load transients. Inductors from 0.33µH to 0.47µH 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
  • Programmable output voltage:
    • 0.600V to 1.394V in 6.25mV steps
    • 0.27V to 0.6272V in 2.8125mV steps
  • Maximum output current: 3A
  • 2.4MHz PWM with seamless PWM/PFM switching for light-load efficiency
  • Dynamic voltage scaling (DVS) with programmable voltage slew rate
  • Excellent load and line transient
  • Programmable VOUT startup delay times
  • Quiescent current in PFM tristate: 48µA
  • I2C interface with SM, FM, FM+ and HS modes
  • Comprehensive protections
    • Input under-voltage lockout (UVLO)
    • Input over-voltage protection (OVP)
    • Over-current and short-circuit protections
    • Thermal shut-down
  • 2.01mm x 1.21mm 15-Bump WLCSP

Block Diagram

HL7594K - HMI Main Photo

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

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