Global Mixed-mode Technology Inc.
G9941
4X Linear Fan Driver for 12V DC Fan
Features
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
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 ex-
cellent regulation over variations in line, load and
temperature.
The G9941 is available in the power TO-252-5 and
SOP-8 with power pad package.
Applications
Notebook Computer Fan Driver
Projector Cooling Fan
Battery Powered Systems
Motherboards
Peripheral Cards
Ordering Information
ORDER
NUMBER
G9941TJ1U
G9941F11U
Note:TJ: TO-252-5
1: Bonding Code
U: Tape & Reel
F1:SOP (FD)
MARKING
G9941
G9941
TEMP.
RANGE
-40°C ~ +85°C
-40°C ~ +85°C
PACKAGE
(Green)
TO-252-5
SOP-8 (FD)
Pin Configuration
G9941
GND
Typical Application Circuit
G9941
VSET
VEN
VIN
VSET
VEN
VIN
VO
GND
Top View
1
2
3
4
5
VO
VO
VIN GND VEN VSET
C
O
10µF
C
IN
2.2µF
TO-252-5
VO =4 X VSET
G9941
VSET
*
VSET
VEN
G9941
VO
VIN
VEN
VSET
1
2
3
4
Thermal
Pad
8
7
6
5
NC/GND
NC/GND
GND
NC/GND
C
O
10µF
C
IN
2.2µF
VIN
VO
VIN
VO
GND
SOP-8 (FD)
VO =4 X VSET
*
: V
SET
< 0.3V Disable; V
SET
>1V Enable
Ver: 0.3
Aug 24, 2009
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
