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LM2621

National Semiconductor
Part Number LM2621
Manufacturer National Semiconductor
Description Low Input Voltage/ Step-Up DC-DC Converter
Published Mar 22, 2005
Detailed Description LM2621 Low Input Voltage, Step-Up DC-DC Converter February 2000 LM2621 Low Input Voltage, Step-Up DC-DC Converter Gene...
Datasheet PDF File LM2621 PDF File

LM2621
LM2621

Overview
...ral Description 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.
2V and 14V and converts it into a regulated output voltage.
The output voltage can be adjusted between 1.
24V and 14V.
It has an internal 0.
17Ω N-Channel MOSFET power switch.
Efficiencies up to 90% are achievable using the LM2621.
The high switching frequency (adjustable up to 2MHz) 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 80µA because o...


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