Global Mixed-mode Technology Inc.
G9966
3A Low Dropout Regulator with Enable
Features
1.5V, 1.8V, 2.5V, 3.3V and Adjustable Outputs
Over Current and Over Temperature Protection
Output Current 3A
Enable Pin
20µA Quiescent Current in Shutdown
TO-263-5 Package
General Description
The G9966 is a high performance positive voltage
regulator designed for use in applications requiring
very low dropout voltage at up to 3 Amps. Since it has
superior dropout characteristics compared with regular
LDOs, it can be used to supply 2.5V on motherboards
or 1.5V, 1.8V, 3.3V on peripheral cards from the power
supply thus allowing the elimination of costly heatsinks.
An enable pin further reduces power dissipation while
shut down. The G9966 provides excellent regulation
over variations in line, load and temperature. It pro-
vides over current and over temperature protection
functions.
The G9966 is available with 1.5V, 1.8V, 2.5V, 3.3V
and adjustable outputs in TO-263-5 package.
Applications
Battery Powered Systems
Motherboards
Peripheral Cards
Network Cards
Set Top Boxes
Notebook Computers
Ordering Information
ORDER
NUMBER
G9966-15TGU
G9966-18TGU
G9966-25TGU
G9966-33TGU
G9966-ADJTGU
MARKING
G9966-15
G9966-18
G9966-25
G9966-33
G9966
TEMP.
RANGE
-40°C ~ +85°C
-40°C ~ +85°C
-40°C ~ +85°C
-40°C ~ +85°C
-40°C ~ +85°C
PACKAGE
(Pb free)
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
Pin Configuration
G9966-XX
Typical Application Circuit
G9966-XX
VEN
VIN
VO
VEN
VIN
VO
GND
C1
220µF
1
2
3
4
5
C2
220µF
VEN VIN GND VO N.C.
TO-263-5
G9966-ADJ
VEN
VIN
VO
R1
C1
220µF
1
2
3
4
5
C2
220µF
R2
G9966-ADJ
VEN
VIN
VO
ADJ
GND
VEN VIN GND VO ADJ
TO-263-5
VO =
1.2 (R1+R2)
Volts
R2
R2=12kΩ is recommended
Ver: 0.6 Preliminary
May 19, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
