The LM2621 is a high efficiency, step-up DC-DC switching regulator for battery-powered
and low input voltage systems. It accepts an input voltage between 1.2 V and 14 V and converts it
into a regulated output voltage. The output voltage can be adjusted between 1.24 V and 14 V. It has
an internal 0.17-Ω N-Channel MOSFET power switch. Efficiencies up to 90% are achievable using the
The high switching frequency (adjustable up to 2 MHz) of the LM2621 allows for tiny
surface mount inductors and capacitors. Because of the unique constant-duty-cycle gated oscillator
topology very high efficiencies are realized over a wide load range. The supply current is reduced
to 80 µA because of the BiCMOS process technology. In the shutdown mode, the supply current is less
than 2.5 µA.
The LM2621 is available in a VSSOP-8 package. This package uses half the board area of a
standard 8-pin SOIC and has a height of just 1.09 mm.
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