The
AX3903 is a high efficiency, 3A current mode synchronous step down DC/DC converter
with a wide input voltage range from 4.7V to 18V. The device integrates high side and low side
MOSFETs to achieve high efficiency conversion. The current mode architecture supports fast
transient response and internal compensation.
The
AX3903 provides complete fault protection including input under voltage lockout, output
short circuit protection, over current protection, and thermal shutdown. The switching frequency
is internally set at 500kHz.
To improve the light load efficiency,
AX3903 has proprietary light load power saving mode
(PSM) to minimize the switching loss by reducing the switching f requency.
The
AX3903 is available in the SOT23_6L package.