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MAX1912

Part Number	MAX1912
Manufacturer	Maxim
Description	1.5x/2x High-Efficiency White LED Charge Pumps
Published	May 6, 2005
Detailed Description	19-2290; Rev 2; 3/04 1.5x/2x High-Efficiency White LED Charge Pumps General Description The MAX1910/MAX1912 power LEDs ...
Datasheet	MAX1912 PDF File

Overview

19-2290; Rev 2; 3/04 1.
5x/2x High-Efficiency White LED Charge Pumps General Description The MAX1910/MAX1912 power LEDs with a regulated output voltage or current (up to 120mA) from an unregulated input supply (2.
7V to 5.
3V).
These are complete DC-DC converters requiring only four small ceramic capacitors and no inductors.
Input ripple is minimized by a unique regulation scheme that maintains a fixed 750kHz switching frequency over a wide load range.
Also included are logic-level shutdown and soft-start to reduce input current surges at startup.
The MAX1910 has two automatically selected operating modes: 1.
5x and 2x.
1.
5x mode improves efficiency at higher input voltages, while 2x mode maint...

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