The XC9307 is a negative voltage output DC/DC converter, available in a small, low profile package measuring 1.8 x 2.0 x 0.4mm.
The internal switching frequency is 2.5MHz, which allows the user to select a small, low profile external coil. A voltage inverting circuit can be built with a height of 0.65 mm or less including the external coil and capacitors.
Compared to a charge pump type solution, the switching method of the XC9307 maintains a stable output voltage even when the input voltage fluctuates. In addition, this new DC/DC converters can support maximum output current 300mA (when VIN = 3.3V, VOUT = -3.0V).
|Input Voltage Range||2.7V ~ 5.5V|
|Output Voltage||-3.2V ~ -3.6V|
|FB Voltage||0.5V ± 10mV|
|VREF Voltage||1.6V ± 40mV|
|Protection Circuits||Current Limit (1.1A TYP.)|
|Soft Start Time||Externally Adjusted|
|Op. Amb. Temperature||-40 ~ 105℃|
Output voltage can be adjusted within the range of -1.2V to -6.0V using externally mounted resistors. The PWM controlled XC9307 series is ideal for applications where low noise is important.
For applications where high efficiency at light load current and low noise at high load current is important, please check-out the XC9308 with PWM/PFM automatic switching control