2A Low Dropout Regulator with Enable

G975
Global Mixed-mode Technology Inc.
2A Low Dropout Regulator with Enable
Features
General Description
Adjustable Output Low to 0.8V
260mV Dropout @ 2A, VO 1.2V
Over Current and Over Temperature Protection
Enable Pin
Low Reverse Leakage (Output to Input )
Power SOP-8 (FD) Packages with Thermal Pad
±2% Output Voltage
VO Power OK Signal
1.05V, 1.2V, 1.8V and 2.5V Options by Setting
ADJ Pin Below 0.2V and Adjustable Externally
Using Resistors
„ VO Pull Low Resistance when Disable
„ VO Soft Start when Enable
The G975 is a high performance positive voltage
regulator designed for use in applications requiring
very low Input voltage and very low dropout voltage at
up to 2 amps. It operates with VPP voltage 5V and
output voltage programmable as low as 0.8V. The
G975 features ultra low dropout, ideal for applications
where VOUT is very close to VIN. Additionally, the G975
has an enable pin to further reduce power dissipation
while shutdown. The G975 provides excellent regulation over variations in line, load and temperature. The
G975 provides a power OK signal to indicate if the
voltage level of VO reaches 92% of its rating value.
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The G975 is available in the power SOP-8 (FD) package. It is available with 1.05V, 1.2V, 1.8V and 2.5V
internally preset outputs that are also adjustable using
external resistors.
Applications
Motherboards
Peripheral Cards
„ Network Cards
„ Set Top Boxes
„ Notebook Computers
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Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Pb free)
G975-105ADJF11U
975-105
-40°C~+85°C
SOP-8 (FD)
G975-120ADJF11U
G975-180ADJF11U
975-120
975-180
-40°C~+85°C
-40°C~+85°C
SOP-8 (FD)
SOP-8 (FD)
G975-250ADJF11U
975-250
-40°C~+85°C
SOP-8 (FD)
Note: F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
e.g. 105 denotes the 1.05V output voltage
Pin Configuration
Typical Application Circuit
G975
VPP (5V)
VPP
G975
GND
ADJ
2
VO
3
VO
4
Thermal
Pad
10kΩ
VIN
VEN
8
1
POK
VEN
7
POK
6
VPP
5
VIN
VIN
VIN
VO
VO
R1
CPP
1µF
C1
20µF
GND
ADJ
C2
20µF
R2
Top View
SOP-8 (FD)
* Thermal Pad can be connected to VIN
** Connect Thermal Pad to ground plate will
have better thermal performance
0.8 (R1+R2)
Volts
R2
R2<120kΩ is recommended
VO =
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.1
Apr 27, 2007
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