Torex simplifies PCB layout with integrated, micro DC/DC converters

Micro DC/DC converters from Torex Semiconductor now include the XCL303 and XCL304 converters, with an integrated inductor. The negative output voltage DC/DC converters are small coil-integrated negative voltage micro DC/DC converter ICs. They have oscillating frequency to 2.5MHz and by adopting the small package CL-2025-02(2.5 x 2.0 x 1.0mm). According to Torex, the mounting area is reduced by approximately 78 per cent compared to general negative voltage output DC/DC(from 65.25 to 14.43mm2 to 14.43mm2).

Integrating the coil with the DC/DC simplifies the circuit board layout and minimises potential noise interference.

Compared to a charge pump type solution, the switching method of the XCL303/XCL304 maintains a stable output voltage even when the input voltage fluctuates. In addition, the micro DC/DC can support maximum output current 300mA (when VIN is 3.3V, VOUT is -3.0V).

The PWM-controlled XCL303 series can be selected for applications where low noise is important, and the PWM/PFM automatic switching controlled XCL304 series can be selected for applications where high efficiency at light load current and low noise at high load current is important.

The XCL303/XCL304 series allows users to select either a PWM control or PWM/PFM automatic switching control method, which are optimum for low noise and small negative voltage devices such as optical communication equipment.

Output voltage can be adjusted within the range of -1.2 to -6.0V using externally mounted resistors.

Torex Semiconductor is a provider of CMOS power management ICs targeted toward battery powered and energy efficient applications. Torex specialises in CMOS analogue technology, with LDO voltage regulators, voltage detectors and DC/DC converters making up our core product offering.

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