The LM2623 is a high-efficiency, general-purpose, step-up DC-DC switching regulator for
battery-powered and low input voltage systems. It accepts an input voltage between 0.8 V and 14 V
and converts it into a regulated output voltage between 1.24 V and 14 V. Efficiencies up to 90% are
achievable with the LM2623.
In order to adapt to a number of applications, the LM2623 allows the designer to vary the
output voltage, the operating frequency (300 kHz to 2 MHz) and duty cycle (17% to 90%) to optimize
the part's performance. The selected values can be fixed or can vary with battery voltage or input
to output voltage ratio. The LM2623 uses a very simple, on/off regulation mode to produce good
efficiency and stable operation over a wide operating range. It normally regulates by skipping
switching cycles when it reaches the regulation limit (Pulse Frequency Modulation).
Note: Please read the Non-Linear Effect and Choosing the Correct C3 Capacitor sections so that any challenges with designing with this part can
be taken into account before a board design/layout is finalized.
For alternative solutions, See Also: LM2700, LM2622, LM2731, LM2733, and LM2621.
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