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MC33680

Part Number	MC33680
Manufacturer	ON Semiconductor
Description	Dual DC-DC Regulator
Published	Apr 21, 2007
Detailed Description	MC33680 Dual DC−DC Regulator for Electronic Organizer The MC33680 is a dual DC−DC regulator designed for electronic orga...
Datasheet	MC33680 PDF File

Overview

MC33680 Dual DC−DC Regulator for Electronic Organizer The MC33680 is a dual DC−DC regulator designed for electronic organizer applications.
Both regulators apply Pulse−Frequency−Modulation (PFM).
The main step−up regulator output can be externally adjusted from 2.
7V to 5V.
An internal synchronous rectifier is used to ensure high efficiency (achieve 87%).
The auxiliary regulator with a built−in power transistor can be configured to produce a wide range of positive voltage (can be used for LCD contrast voltage).
This voltage can be adjusted from +5V to +25V by an external potentiometer.
The MC33680 has been designed for battery powered hand−held products.
With the low start−up voltage from 1V ...

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