0.8A step-up DC/DC converters feature load disconnection function

Furthermore, there is a significant need for space-saving and the demand for small package lineupsand the high efficiency that enables long battery life. A market needs step-up DC/DC converters that save space and have advanced functionality. The recently launched XC9141/XC9142 series of 0.8A step-up DC/DC converters with a load disconnection function are suitable power ICs for home healthcare and wearable devices that require space saving, advanced functionality and high efficiency.

The ultra-small WLP-6-01 package (1.28x1.08x0.4mm) makes a further contribution to space-saving design. Reduction of the on-resistance of the internal transistor enables high-efficiency supply of a stable current up to 0.8A. When the output voltage is 3.3V, the IC can start from an input voltage of 0.9V with a resistance load of 100Ω, enabling use in devices driven by one alkaline or nickel-hydrogen battery. The input voltage range is 0.65 to 6.0V, and the output voltage range can be set from 1.8 to 5.5V (accuracy ±2.0%) in steps of 0.1V.

A switching frequency of 1.2 or 3.0MHz can be selected to match the application. PWM control (XC9141) or PWM/PFM auto switching control (XC9142) can be selected for the operation mode.Internal functions include soft start, load disconnection, CL auto discharge, and a bypass switch function. Internalprotective circuits include over-current limiting, integral latch and output short protection. The SOT-25 package, small USP-6C package (1.8x2.0x0.6mm), and ultra-small WLP-6-01 package (1.28x1.08x0.4mm) are available to match the application.