The HM3440 is high efficiency, fixed frequency,Buck-Boost DC/DC converter that operates frominput voltages above, below or equal to the outputvoltage. The devices are suitable for singlelithium-ion, m

>Description
The HM3440 is high efficiency, fixed frequency,
Buck-Boost DC/DC converter that operates from
input voltages above, below or equal to the output
voltage. The devices are suitable for single
lithium-ion, multicell alkaline or NiMH applications
where the output voltage is within the battery
voltage range.
The switching frequencies up to 1.5 MHz could be
fixed by employing an external resistor, and the
oscillator could be synchronized to an external
clock. The quiescent current is 1mA, and this
feature maximizing the battery life in portable
applications.
Other features include a 1µA shutdown, thermal
shutdown and current limit. The HM3440 is
available in the 10-pin thermally enhanced MSOP
packages (or upon request).
CD7嘉泰姆