Expanded lineup of ultra-low quiescent current step-up DC-DC converters

Torex Semiconductor Ltd. has released 400nA PWM/PFM Ultra-Low Quiescent Current, Step-up DC-DC Converters – XC9145 series.

The series decreases current consumption to 400nA with an ultra-low current consumption circuit. By using PWM/PFM control method, the efficiency at light load, particularly at the output current of several μA, has been hugely improved compared to the traditional product. Efficiency at VIN = 2.4V, VOUT = 3.3V, IOUT = 10μA reaches 89.9%, which works well with the MCUs and SoCs whose power consumption is becoming lower. Without complicated control, the constant boost operation greatly decreases the power consumption of devices with a large system standby ratio, such as IoT and portable devices. It also adds longer battery life.

We use an ultra-small WLP-6-05(1.28mm x 1.08mm x h0.4mm) in the series package. This makes it possible to save space in the IC mounting area. Even if peripheral parts (small coil, small ceramic capacitor) are externally attached, the mounting area can be accommodated within 5.4mm x 6.7mm. Also, the high efficiency throughout standby makes it possible to reduce the size and capacity of the battery. It also contributes to the miniaturisation of the entire device.

The operating ambient temperature corresponds to 105. The series are suitable for industrial equipment, IoT, mobile, wearable and all devices that emphasise better life where small size, saving area, high-efficiency performance at a light load current are important.