General Description

LN4919 is with proprietary Hall effect plate and single

CMOS output driver, mainly designed for battery–powered,

hand-held equipment (such as Cellular and Cordless

Phone, PDA).

When north-pole of sufficient strength on chip or south-pole

of sufficient strength under chip, the LN4919 will turn on

the OUT output. When south-pole of sufficient strength on

chip or north-pole of sufficient strength under chip, the

LN4919 will turn on the OUT output.

LN4919 series have above two kinds Hall effect output,

please select appropriate model for different application.

While the magnetic flux density (B) is larger than operate

point BOP, the OUT will be turned on (low), the output is

held until B is lower than release point BRP, then turned off

(high).

Features

 1.8V to 4.5V battery operation

 Operation with North or South Pole

 Chopper stabilized

 Superior temperature stability

 Extremely Low Switch-Point Drift

 Insensitive to Physical Stress

 Good RF noise immunity

 ESD HBM bigger than 4kV

 Lead Free Finish/RoHS Compliant

■ Application

 Mobile phones and Portable electronic devices

 Notebook