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Global Mixed-mode Technology

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G973 Datasheet

4A Low Dropout Regulator

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Global Mixed-mode Technology Inc.
G973
4A Low Dropout Regulator with Enable
Features
„ Adjustable Output Low to 0.8V
„ 330mV Dropout @ 4A, 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
„ 1.2V Options by Setting ADJ Pin Below 0.2V
and Adjustable Externally Using Resistors
„ VO Pull Low Resistance when Disable
„ VO Soft Start when Enable
Applications
„ Motherboards
„ Peripheral Cards
„ Network Cards
„ Set Top Boxes
„ Notebook Computers
Ordering Information
ORDER
NUMBER
MARKING
G973-120ADJF11U
973-120
Note: F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
e.g. 120 denotes the 1.20V output voltage
Pin Configuration
General Description
The G973 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 4 amps. It operates with VPP voltage 5V and
output voltage programmable as low as 0.8V. The
G973 features ultra low dropout, ideal for applications
where VOUT is very close to VIN. Additionally, the G973
has an enable pin to further reduce power dissipation
while shutdown. The G973 provides excellent regula-
tion over variations in line, load and temperature. The
G973 provides a power OK signal to indicate if the
voltage level of VO reaches 92% of its rating value.
The G973 is available in the power SOP-8 (FD) pack-
age. It is available with 1.2V internally preset outputs
that are also adjustable using external resistors.
TEMP.
RANGE
-40°C~+85°C
PACKAGE
(Pb free)
SOP-8 (FD)
Typical Application Circuit
GND 1
G973
8 VEN
ADJ 2
VO 3
Thermal
Pad
7 POK
6 VPP
VO 4
5 VIN
Top View
SOP-8 (FD)
* Thermal Pad can be connected to VIN
** Connect Thermal Pad to ground plate will
have better thermal performance
VPP (5V)
VIN
VO
C1
(optional)
R1
CPP
CIN
CO
1µF 20µF 20µF
R2
G973
VPP
VEN
VIN
VO
ADJ
POK
GND
10kΩ
VIN
1. VO =
0.8 (R1+R2)
R2
Volts, R2<120kΩ is recommended
2. C1 is not necessary. VO is also stable if C1 = 22pF~150pF
Ver: 0.3
Nov 21, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
1


Part Number G973
Description 4A Low Dropout Regulator
Maker Global Mixed-mode Technology
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G973 Datasheet PDF






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