Global Mixed-mode Technology Inc.
G961
1A Low Dropout Regulator with Enable
Features
Adjustable Output from 1.2V to 4.8V Using Ex-
ternal Resistors
1.5V, 1.8V and 2.5V Options by Setting ADJ Pin
Below 0.2V
Over current and over temperature protection
400mV dropout @1A
Enable pin
10碌A(chǔ) quiescent current in shutdown
SOT-89-5 Package
General Description
The G961 is a high performance positive voltage
regulator designed for use in applications requiring
very low dropout voltage at up to 1 Amps. Since it has
superior dropout characteristics compared to regular
LDOs, it can be used to supply 2.5V on motherboards
or 1.5V, 1.8V on peripheral cards from the 3.3V supply
thus allowing the elimination of costly heatsinks. An
enable pin further reduces power dissipation while
shut down. The G961 provides excellent regulation
over variations in line, load and temperature.
The SOT-89-5 is available with 1.5V, 1.8V and 2.5V
internally preset outputs that are also adjustable using
external resistors.
Applications
Battery powered systems
Motherboards
Peripheral cards
Network cards
Set Top Boxes
Medical Equipment
Notebook Computers
Ordering Information
ORDER
NUMBER
G961-15ADJTEU
G961-18ADJTEU
G961-25ADJTEU
ORDER NUMBER
(Pb free)
G961-15ADJTEUf
G961-18ADJTEUf
G961-25ADJTEUf
MARKING
961-15
961-18
961-25
TEMP.
RANGE
-40擄C ~ +85擄C
-40擄C ~ +85擄C
-40擄C ~ +85擄C
PACKAGE
SOT-89-5
SOT-89-5
SOT-89-5
Note:
TE: SOT-89-5
U : Tape & Reel
e.g. 18 denotes the 1.8V output voltage.
Pin Configuration
Typical Application Circuit
R3
I
ENH
G961
VEN
VIN
VO
GND
G961
VIN
5
VEN
4
VEN
VIN
VO
R1
C1
22碌F
C2
47碌F
R2
ADJ
1
ADJ
2
GND
3
VO
Volts
R2
R2=12k惟 is recommended
VO =
R3 should be connected for current I
ENH
restriction as V
EN
> V
IN
+0.3V
1.2 (R1+R2)
SOT-89-5
Ver: 1.2
Apr 01, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
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