The HC1081 is a dual high efficiency
synchronous, PWM step-down DC/DC
converters working under an input voltage range
of 2.5V to 5.5V. This feature makes the
HC1081 suitable for single Li-lon
battery-powered applications. 100% duty cycle
capability extends battery life in portable devices,
while the quiescent current is 190 µ A with no load,
and drops to < 1 µ A in shutdown.
The internal synchronous switch is desired to
increase efficiency without an external Schottky
diode. The 1.43 MHz fixed switching frequency
allows the using of tiny, low profile inductors and
ceramic capacitors, which minimized overall
solution footprint.
The HC1081 converters are available in the
industry standard DFN-10L Packages.