Halo Microelectronics’ DC-DC converter reduces power consumption

Halo Microelectronics announces its latest addition to the buck converter product line, the HL7543, designed specifically for wearable devices and its high efficiency makes it an ideal choice for battery-powered devices.

HL7543 features an input voltage range between 2.3V to 5.5V delivering up to 600mA high efficiency while maintaining over 90% efficiency at load current as low as 10μA. Its wide range of output capacitors can be used to optimize VOUT stability during load transients, and inductors of 2.2 μH may be used without affecting loop stability.

HL7543 operates at a high frequency of 1.2MHz, greatly reducing the value of the required external components. At moderate to light loads, the Pulse Frequency Modulation (PFM) is used to maintain conversion efficiency with non-switching quiescent currents. The system automatically switches to fixed-frequency Pulse Width Modulation (PWM) operation at 1.2MHz for minimum VOUT ripple and optimal load transient response at higher loads. In shutdown mode, the HL7543’s supply current drops below 270nA, significantly reducing power consumption.

Primary applications include wearables, fitness trackers, and smartwatches.

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