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LM3570

Part Number	LM3570
Manufacturer	National Semiconductor
Description	Low Noise White LED Driver System
Published	Mar 22, 2005
Detailed Description	LM3570 Low Noise White LED Driver System July 2004 LM3570 Low Noise White LED Driver System General Description The LM...
Datasheet	LM3570 PDF File

Overview

LM3570 Low Noise White LED Driver System July 2004 LM3570 Low Noise White LED Driver System General Description The LM3570 device provides a complete LED driver solution for wireless handsets and other portable devices using a display and keypad.
With three constant current sources, up to three white LEDs can be used for display lighting with excellent current matching (0.
3% typ.
).
The regulated 4.
35V output voltage is perfect for driving auxiliary keypad LEDs in voltage mode.
The LM3570 utilizes a high efficiency 3/2 CMOS chargepump with a pre-regulation loop that minimizes conducted noise on the input.
It accepts an input voltage range from 2.
7V to 5.
5V and maintains a constant current d...

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