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DC-DC converter family with negative outputs

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By Nick Flaherty


The XC9307 / XC9308 series are negative voltage output DC-DC converter modules measuring only 1.8×2.0x0.4mm.

The mounting area is reduced by approximately 70 percent (65.25mm2 to 19.11mm2) compared to general negative voltage output DC-DC converter, which can contribute to downsizing and thinning of electronic devices.

Compared to a charge pump type solution, the switching method of the XC9307/XC9308 maintains a stable output voltage even when the input voltage fluctuates. In addition, the DC-DC converter design supports a maximum output current of 300mA (when VIN = 3.3V, VOUT = -3.0V).

The output voltage can be adjusted within the range of -1.2V to -6.0V using externally mounted resistors. The PWM controlled XC9307 series can be selected for applications where low noise is important, and the PWM/PFM automatic switching controlled XCL304 XC9308 series can be selected for applications where high efficiency at light load current and low noise at high load current is important.

Torex Semiconductor – www.torexsemi.com

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