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The HL7603 provides a power supply solution for products powered by Li-Ion Battery, Silicon Anode Battery or LiFePO4 Battery. By combining built-in power transistors, synchronous rectifier, and low supply current, this IC is optimized for single-cell portable applications like in mobile devices, tablet PCs, wearable devices or accessories.

The HL7603 is a boost regulator designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below system minimum requirement. This extends the battery run-time and overcomes input current and voltage limitations of the powered system. The output voltage regulation is guaranteed up to a maximum load current of 4A in continue and 5A in peak(<10mS). The regulator can transit smoothly between Bypass Mode and normal Boost Mode and also can work under Forced Bypass Mode for minimizing quiescent current.

The HL7603 is available in a 16-bump, 0.4mm pitch, Wafer-Level Chip-Scale Package (WLCSP).

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


  • Input Voltage Range: 2.3V~5.5V
  • Output Voltage Range:
    • Adjustable by I2C: 2.85V to 5.5V
  • Low IQ operating current:
    • 15uA IQ under Low IQ Forced Bypass Mode
    • 20uA IQ under Normal Forced Bypass Mode
    • 35uA IQ under Auto PFM Mode
  • Maximum Output Current:
    • Continuous 4A with 2.7V to 3.6V
    • Peak 5A@10mS with 2.7V to 3.6V
  • 5MHz Operation Frequency with Seamless PWM/PFM Transition
  • Bypass Mode Rdson: 10mohm@TYP
  • Optional Auto Bypass Mode and Forced Bypass Mode
  • Optional Forced PWM Mode and Auto PFM Mode for Boost Operating Mode

Block Diagram

HL7603 - HMI Main Photo

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

Related Products

Part Description
HL7601 2A Boost Regulator with Bypass Mode
HL7612 2.5MHz High Efficiency Boost Converter