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LM2621 - Low Input Voltage/ Step-Up DC-DC Converter

Datasheet Summary

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.

Features

  • n Small Mini-SO8 Package (Half the Footprint of Standard 8-Pin SO Package) n 1.09 mm Package Height n Up to 2 MHz Switching Frequency n 1.2V to 14V Input Voltage n 1.24V - 14V Adjustable Output Voltage n Up to 1A Load Current n 0.17 Ω Internal MOSFET n Up to 90% Regulator Efficiency n 80 µA Typical Operating Current n < 2.5µA Guaranteed Supply Current In Shutdown.

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Datasheet preview – LM2621

Datasheet Details

Part number LM2621
Manufacturer National Semiconductor
File Size 254.88 KB
Description Low Input Voltage/ Step-Up DC-DC Converter
Datasheet download datasheet LM2621 Datasheet
Additional preview pages of the LM2621 datasheet.

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Full PDF Text Transcription

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LM2621 Low Input Voltage, Step-Up DC-DC Converter February 2000 LM2621 Low Input Voltage, Step-Up DC-DC Converter General 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.
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