LR18115

DESCRIPTION 

The UTC LR18115 is a low output resistance 1.6X positive 

voltage linear fan driver with very low dropout voltage at up to 

500mA. The UTC LR18115 consists of an error amplifier, output

stage, voltage divider, over temperature protection, current limiting 

scheme and Fully Control logic. VOUT voltage follows the 1.6 times of 

VSET voltage until it reaches VIN voltage. The VSET voltage must be 

larger than 1V to guarantee VOUT 1.6 times of VSET. When given low, 

VOUT can be fully turned on by FON pin. Good regulation over 

variation in line, load and temperature is also provided by UTC 

LR18115. 

FEATURES 

* VOUT Follows 1.6 Times of VSET

* 0.3Ω Output Resistance @ 0.5A 

* Over Temperature Protection 

* Current Limiting Protection 

* FON Pin to Turn VOUT Fully On