LP3954 Datasheet, PDF (29/56 Pages) National Semiconductor (TI) – Advanced Lighting Management Unit

7V Shielding
To shield LP3954 from high input voltages 6…7.2V the use of external 2.8V LDO is required. This 2.8V voltage protects internally
the device against high voltage condition. The recommended connection is as shown in the picture below. Internally both logic and
analog circuitry works at 2.8V supply voltage. Both supply voltage pins should have separate filtering capacitors.
In cases where high voltage is not an issue the connection is as shown below
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