Torex shrinks end product size with integrated DC/DC converters

The XCL104 / XCL105 synchronous step-up DC/DC converters integrate an inductor with a 0.17 Ohm N-channel driver FET and a 0.23 Ohm synchronous P-channel switching FET. 

In addition to the 1.4A driver, a coil is integrated which helps to reduce the size of the product as well as the time taken to select components because fewer external components are needed, said Torex. The coil pattern is also the shortest on the board layout to achieve a low noise performance.

The series is able to start operation from an input voltage of 0.9V, suitable for equipment using a single alkaline battery or nickel metal hydride battery. The output voltage range is 1.8V to 5.5V and can be set in 0.1V increments. 

The XCL104 / XCL105 achieves 1.4 times the output current of previous devices, said Torex. In addition, there are three selectable functions to further reduce the power consumption of IC-equipped devices and to extend battery life.

The load disconnect type is equipped with load disconnection and CL discharge functions to reduce the output voltage at high speed to prevent the output device from malfunctioning in standby mode.

The bypass type corresponds to a large range of working voltages in a microcontroller. For example, when the microcontroller is in sleep mode, input and output are conducted by the bypass function. Battery voltage is boosted only when a constant voltage such as 3.3V is required, to contribute to reduced overall power consumption.

The output OR types are suitable for output connection (OR connection) to multiple power supplies and backups. The load disconnection function cuts off the continuity between the input and output and makes an OR connection to the output with other power supplies. It also supports automatic switching with other power supplies connected by OR.

The under-voltage lockout function can stop IC operation when the battery voltage is too low, which can reduce the leakage of alkaline batteries, reported Torex.

The operating temperature range is up to +105°C, suitable for industrial equipment that requires small size, low power consumption such as IoT devices, mobile and wearable devices and all equipment in which extended battery life is paramount.

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