Descriptions
The SC81420BQ and SC81420CQ are synchronous Buck
converter with a wide input voltage range from 3V to 36V,
providing 2A current capability options. The converter
regulates the output voltage at customized voltage through
setting the divider resistors. It also provides highly efficiency
output current and fast loop response with current mode
control.
The SC81420BQ and SC81420CQ are specifically designed
for automotive applications. The device integrates useroptional
spread spectrum and QFN package, whose
symmetrical pinout to optimize the EMI performance. In
order to minimize solution size, two fixed switching
frequency options are available to remove RT resistor. The
switching frequency can also be synchronized to external
clock through multiplexing EN/SYNC pin. For fixed
frequency parts, a power good function is available by the
PG pin. In addition, the device incorporates highly efficient
PFM mode. If low output ripple is desired over full
operational load range, FPWM mode option is also available.
The SC81420BQ and SC81420CQ employ both peak
current limit and valley current limit to help protect the device
from overload as well as provides short-period heavy current
capability. It also provides thermal shutdown, input UVLO,
output short-circuit protection to enable systematical robust
operation.