G9941F11U

G9941 Global Mixed-mode Technology Inc. 4X Linear Fan Driver for 12V DC Fan Features General Description „ The G9941 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 0.5 Amps. The G9941 VO output voltage follows the 4.0 times of VSET voltage until it reaches VIN voltage. The VSET voltage must be larger than 1V to guarantee VO 4.0 times of VSET. An enable pin further reduces power dissipation while shut down. The G9941 provides excellent regulation over variations in line, load and temperature. „ „ „ „ „ VO Follows 4.0 Times of VSET 0.5V Dropout @ 0.5A Over Current and Over Temperature Protection Enable Pin 100µA Quiescent Current in Shutdown Power TO-252-5, SOP-8 with power pad Package Applications „ Notebook Computer Fan Driver Projector Cooling Fan „ Battery Powered Systems „ Motherboards „ Peripheral Cards „ The G9941 is available in the power TO-252-5 and SOP-8 with power pad package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G9941TJ1U G9941F11U G9941 G9941 -40°C ~ +85°C -40°C ~ +85°C TO-252-5 SOP-8 (FD) Note:TJ: TO-252-5 1: Bonding Code U: Tape & Reel F1:SOP (FD) Pin Configuration Typical Application Circuit G9941 VSET G9941 VSET VEN VEN GND Top View 1 VO 2 3 4 VIN VIN VO VO GND 5 CIN 2.2µF CO 10µF VIN GND VEN VSET TO-252-5 VO =4 X VSET G9941 * VSET VSET G9941 VO 1 VIN 2 VEN 3 VSET 4 Thermal Pad VEN 8 NC/GND VIN VIN 7 NC/GND VO VO 6 GND 5 NC/GND CO 10µF GND CIN 2.2µF SOP-8 (FD) VO =4 X VSET * : VSET < 0.3V Disable; VSET >1V Enable TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Aug 24, 2009 1