RT9027A

RT9027A/B Linear Fan Driver General Description The RT9027A/B is a high performance positive voltage regulator designed for very low dropout voltage up to 0.5 Amps. The VSET voltage must be larger than 1V to guarantee that VOUT is 1.6 times of VSET. When VSET is less than 1V, the IC will be shutdown. The FON pin turns VOUT to fullyon when FON is given low. For RT9027B (EN version), FON pin is equivalent to EN pin. The RT9027A/B provides excellent regulation over variations in line, load and temperature. The RT9027A/B is available in the SOP-8 package. Features z z z z z VOUT Follows 1.6 Times of VSET 150mV Dropout @ 0.5A Over Current and Over Temperature Protection FON Pin Turns VOUT Fully On RoHS Compliant and 100% Lead (Pb)-Free Applications z z z z Notebook Computer Fan Driver Battery Powered System Motherboard Peripheral Card Ordering Information RT9027 Package Type S : SOP-8 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) A : FON Function B : EN Function Pin Configurations (TOP VIEW) FON VIN VOUT VSET 2 3 4 8 7 6 5 GND GND GND GND RT9027A EN VIN VOUT VSET 2 3 4 8 7 6 5 GND GND GND GND Note : Richtek Pb-free and Green products are : ` RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. ` RT9027B SOP-8 Typical Application Circuit VIN CIN 2.2uF VSET FON/EN 4 1 2 VIN VOUT 3 COUT 2.2uF 5 to 8 VOUT RT9027A/B VS...